Search

A quadruple micro PANDA ring resonator quantum gate device is designed and investigated schematically. The simulation results of the optimum propagation of soliton polarized states in the device depend heavily on initial phase angles of the input ports. The quality factor under varying of nonlinear coupling constant of micro strip line waveguides are also analyzed. The simulation results show more robust under the wide range of the outer tunneling frequency in whispering gallery modes of the device. This means that an optical trapping efficiency is attained and get more stable qubit processing.

From practical experience is well known that the establishment of the right values for the cutting regime parameters (without taking into consideration the cutting schematics) is requiring a large volume of work, thorough calculations and accurate input information regarding the process to be conducted. The high competition from the market is generating increased requirements concerning the productivity of processes, quality of the products as well as the production costs. There it is a strong correlation between these issues and the accurate determination of the cutting regime parameters. This article presents the methods of calculation for the cutting regime parameters for drilling process by using analytical method (classical) and automated method (by using specialized software packages) and the analysis of the results obtained with the goal of establishing which of them are providing the best results in the shortest period of time.

EMU gearbox is a key component of high-speed train, the reliability of the gearbox will directly affect the operational safety of EMU. The box of EMU gearbox is with light alloy materials, bearing structure, so the box is subjected to greater loads and shock and vibration. Designers most take into account the static strength and stiffness of the box, ignore the fatigue failure. Fatigue failure is the leading cause of mechanical structural failure, while the peak load cycle fatigue failure is often far less than estimated in accordance with the static fracture analysis "safe" load, so the EMU gearbox box’s fatigue analysis is needed. Combining high-speed EMU gearbox actual operating conditions, using finite element method to do fatigue analysis of the gearbox box while the analysis result is evaluated and amended by the Smith schematic analysis method.

This article describes the alternative mathematical modelling of a human's leg by means of switched system approach. The leg is considered three joints connected by a rotational link. The novelty of each of the links being represented as a rectangular prism changing shape during motion introduces new possibilities of model application. Each of the links is represented as a rectangular prism which's shape depends on the three state coordinates - the angular displacements q1, q2 and q3. A design process is then made on the basis of switched system theory. In several steps we show the transition from the general equation of the three-link leg dynamics to the switched linear system where the switching rule depends on the state vector. A switching method is presented in schematics.

Improvement of calculation accuracy of dynamical processes in an inductor with the massive magnetic core is an actual problem. The mathematical model of these processes consists of electrical and magnetic balance differential equations derived for the non-linear inductor generalized equivalent circuit. The main attention is focused on the non-linear inductor dynamical model schematic implementation, and development of a robust algorithm to analyze electromagnetic processes in non-stationary modes by means of structured modeling in Matlab Simulink.

Installing capacitors in a large unbalanced electrical distribution system will indeed improves the performance of the system in terms of its voltage profile and real power loss stability. However, determining the suitable locations for capacitors installation with an appropriate sizing in an unbalanced electrical distribution system involves an intricate process. This impediment can be resolved by implementing an optimal capacitors placement and sizing. The proposed technique is a highly nonlinear optimization problem which requires discrete and multi-dimensional control variables of capacitor locations and sizes. This paper proposed a new artificial intelligence approach used to reduce the total line real power loss and total real power consumption while maintaining the voltage profile along the feeders. It was done by integrating the circuitry schematic diagram of an unbalanced electrical distribution system modeled in SIMULINK® software with the computational programming based differential evolution particle swarm optimization (DEPSO) for optimal capacitors placement and sizing developed under the MATLAB® software. In this study, pre-selection of the capacitor locations can be considered as the first stage of the proposed concept and it is commenced prior to the optimization process performed by the DEPSO algorithm considered as the second stage of the proposed concept. A modified IEEE 13-bus unbalanced radial distribution system is used verify effectiveness of the proposed technique in solving the problem. The results will be discussed notably through comparative studies on the objective function of total cost and performance of the DEPSO technique.

The procedure, by which the functional and physical elements of a product are arranged, is known as the product architecture. It highlights the interaction between parts of product. It is a phase where the function of a product is assigned to its physical. The role of product architecture in a product development is very vital since a comprehensive choice of the product architecture provides a good idea on how the functions are understood and how a standardization is achieved. In this regard, this paper presents the following: the product schematic, product cluster, product geometry, and fundamental and incidental product elements interactions of a grease trap design.

In this research power rock cutting mechanisms are considered. Impact and vibratory impact mechanisms are presented, their design characteristics are given. The new peenless power pulse hydraulic mechanism is considered, its operating principle is described, and the schematic diagram is provided. The new system can be used at building of the new rock-drilling machines with a hydraulic actuator for the intensification of the process of rocks destruction.

Analysis has been made on the adaptive optimization design of machining center tool changing manipulator by the application of the quantitative analysis tools. Thus adaptive comprehensive evaluation index is proposed and the adaptive comprehensive evaluation model of product is established. On the basis of primary evaluation on various indicators such as Product function adaptability with methods of Multilevel Fuzzy Integrative Evaluation, then, the secondary comprehensive evaluation will be continued and comprehensive adaptability evaluation level of FV-1100A machining center tool changing manipulator will be gained, thus providing guides and evidence for further improvement of product design. Through presenting adaptive measuring values of all proposals in schematic design phase and the quantitate evaluation on the complexity of modifying the design.

In this paper, we report a dual-wavelength temperature sensor based on fiber optic delay. This temperature sensor don’t need to rely on accurate spectrum measurement, but to realize temperature measurement by detecting the variation of delay, which can efficiently reduce the cost and complexity of sensor system. In this dual-wavelength system, one wavelength of light is used as a reference and the other one is used for temperature sensing, so this design can effectively eliminate the negative influences of unstable external environment. The principle of this temperature sensor is theoretically derived, the schematic of sensor system is analyzed and the feasibility of this method is tested in the temperature range of 0°C-80°C. Results indicate that, this temperature sensor is able to achieve temperature measurement in a simple way with low cost.

The paper substantiates the use of the controlled electric drive of the circulating pumps in the hot-water supply systems of buildings. It considers the pump capacity control method as a function of the daily hot water consumption. The law of controlling motor speed with limitation of the minimum and maximum allowable water consumption has been proved. The schematic structure of the system controlling water consumption in the hot water supply circulation circuit is provided. Based on results of analysis of the daily water supply diagram both in case of controlled and uncontrolled consumption, the efficiency of the proposed method has been confirmed. Energy resource saving in the hot water supply system of the existing heating unit has been experimentally substantiated.

s. At present, based on the bypass method to measurement the dynamic of the high pressure side flow in hydraulic system became more and more. In order to analysis the dynamic characteristics, the bypass method measurement system flow schematic was introduced in this paper, the dynamic flow of the main oil and the system was obtained by using dynamic flow of the side oil. Meanwhile, the dynamic pressure of the main oil was obtained by using dynamic pressure of the side oil. From the results of numerical analysis indicates that it is feasible to use the bypass method to get the characteristics of the dynamic flow and dynamic pressure in the system.

In this paper, a design and an implementation on an intelligent guide system based on Android platform is proposed. The hardware of system is based on ARM platform, and the schematics of its main modules such as power, SDRAM are given. Then Android operation system is transplanted on the ARM platform. On this basis, the application software is developed using Eclipse and Android SDK, and it is consisted of three modules: multimedia application, web maps and recording. The module of multimedia application includes audio, picture and video. Web maps can display Google Maps on the device and achieve positioning. The record module has implemented the several normal operation on a record, such as creating, modifying and displaying.

Brushless DC Motor is a kind of a new motor which commutation signals replaces traditional motor mechanical structure with electronic signals. Square wave brushless DC motor can be divided into sensor motor and sensorless motor. Position sensor will increase system cost, motor size and maintenance difficulty, which bring about limitation and limits to promote its application in all areas. This project designs sensorless BLDC Motor control system with the core of the stm32 micro-controller and uses Back-EMF zero-crossing detection method. In the system designing software control algorithm, drawing schematic diagram of hardware and making PCB board have been completed dependently. The experimental results show that the system can well realize the starting and running of sensorless BLDC Motor control system, and have a good measure of protection.

This article introduces the operating schematic of the ABS. Based on its working characters, an ABS testing bench is introduced. The main parameters of the testing bench are also designed. Its validity and feasibility are proved by modeling and the fem simulative analysis.

A second-order single bit Sigma - Delta modulator which can be applied to pressure sensor is designed in this paper.The modulator uses switched-capacitor circuit,and the operational amplifier adopts a differential folded-cascode structure with PMOS tube as input. Optimizes the coefficients at the system level design using Simulink tool. The schematic simulation and analysis is by the tools of Spectre and MATLAB with Global Foundry 0.35um CMOS technology. The modulator with oversampling rate of 256 is designed at the 3.3V power supply. Finally, this paper shows the circuit simulation results of the sigma-delta modulator whose signal-noise rate is 103.9dB and resolution is 16.97bits.

This paper mainly introduces how to design an upper computer interface for two-dimensional turntable under the environment of VS2010 using MFC, in order to provide a comfortable and easy operating environment for user. These technology are amply analyzed such as the serial communication, the curve drawing of motor speed, the display of hand wheel schematic. The PC software has the function of management and control of the two-dimensional turntable which is verified by experiments.

In combination with ALU design, this paper proposes a design method based on the sharing of resources equivalent transformation. Based on the analysis of a resource-shared ALU design example, an ALU function is presented. Compared with method based on the instruction function design, the resource sharing design methods have unique advantages in terms of saving resources. The design method is not suitable for modern HDL-based design method described herein, but also to the schematic design of a conventional method.

This paper focuses on scraps of paper splicing recovery issues. To deal with complex scraps restoration problem, first the image should be changed as pixel grey level binary image, generating binary matrix, and then classify the scraps using SOM neural network data and feature comparison method. Combining with the Euclidean distance discriminant method, we match the scraps of paper with same edges and obtain a complete stitching schematic finally.

In this paper, we use 3D imaging technique to conduct in-depth research in the football training, and obtain the 3D space image of the best football team. We use FPGA hardware platform to design the control program of 3D image, and judge the performance of synthetic parameters, and test process curve and schematic diagram of 3D imaging. Combined with Kmeans algorithm we design the clustering algorithm mathematical model of 3D image, and give the control programming. Finally, based on the 3D synthesis image and optimization of display technology, using the image acquisition and skill of physical body, finally we get the best offensive and defensive football team. It provides the theory reference for the training of football players.

This paper studies a residual current monitoring system; PLC and PC select a combination of hardware, and to identify the specific method for AC and DC small signal data acquisition. On the software side, gives the effect of a schematic diagram of a data processing program, summed up the real-time data acquisition methods section. In the PLC control test procedures, test procedures were analyzed for comparison with the given process flow diagram of the main test and the numerical results, the present system reduces the complexity of the control to improve the automation of the detection process.

The hierarchy design method of digital system based on EDA is proposed through the design of digital frequency meter system in this paper. Firstly, it divides the frequency meter into different function module and Writes VHDL code to describe each module circuit. Then, it creates the schematic diagram of top circuit. Design input, compiled, logic synthesize and function simulation are accomplished use MAX+PLUS II. In the end, digital frequency meter is implemented in CPLD. The results show that the design method can greatly simplify the complexity of hardware circuit structure. Its characteristic is high reliability and strong flexibility.

In marine organisms the carbon sink function of shellfish moves in circles. It not only has a great influence on the marine environment, also has the very important significance for the construction of marine ranching to realize the benefits of recycling economy. If the carbon consumption exceeds marine soil and Photosynthesis Carbon input, the marine environment will be subject to different degrees damage, and affect the marine farming production process. Based on this, this paper analyses and studies the shellfish and algae carbon sink function. The first part of this paper introduces shellfish and algae carbon sink regulation function, gives the schematic diagram of carbon cycle, and establishes a column chart through using the preliminary statistical data. The second part establishes the shellfish and algae carbon sink ecological economic system mathematical model in the construction of marine ranching, and gives the adjustment function diagram of ecosystems two coordination function. The third part uses the professional statistical analysis software SAS to draw the shellfish and algae carbon curve of marine ranching construction, which provides theoretical reference for considering the carbon sink function of marine ranching construction.

In the author’s opinion, Spot Welding Procedures Chart D.1 (hereafter referred to as Figure D.1) in Appendix D of International Standard ISO 15609-5 [1] is not accurate in principle. This figure is not suitable for materials need exerting forging force for spot welding such as aluminum alloy, especially hard aluminum alloy, for it does not correctively reflect loading moment of forging force. In the author’s opinion, the loading moment of forging force given by Figure D.1 is too late, which will lead to the generation of crack. In addition, two important reasons equally considered to advance loading moment of forging force are: (1) different spot welding equipments have different response time for welding pressure; (2) electric response speed is faster than that of mechanical or pneumatic mechanism, that is to say, response speed of current shall be faster than implementation speed of forging force. Is this paper, we discuss such above-mentioned kinds of different situations. We suggest advancing the forging force in Figure D.1 to the maintenance course of welding current. We propose an amended spot welding course schematic diagram and a simplified schematic diagram.

In this thesis, we take SH79F32 as main chip, the ultrasonic sensor of HC-SR04 as collection tools, wireless transceiver based on nRF905 as communication tool, and reach the function of wireless sensor networks. Through Altium DXP-2004 to conduct schematic design and draw PCB, and then solder circuit boards, use the software of Keil to design process, to realize wireless ultrasonic sensor communication between different microcontrollers, after that, complete the design and production of wireless ultrasonic sensor design and production.

By describing the environmental requirements for food storage, puts forward the green air conditioning system to create a low-temperature environment for food of these creatures such as ice storage air-conditioning, ground source heat pumps, solar cooling and so on. Combined the related system diagram or schematic in the context of promoting green and healthy, pointed out the future direction of development of the low-temperature grain storage.

A clock-inverter feed-forward toggle flip-flop (CIFF-TFF) based ultra-high-speed 2:1 dynamic frequency divider is designed in a GaAs heterojunction bipolar transistor (HBT) technology with fT of 60 GHz from Win Semiconductors corporation. The co-simulation methodology of electromagnetic field and schematic diagram is utilized in the design. Through tuning the currents in the core and the other parts of the divider separately, the dynamic frequency divider approaches an operating speed of 36 GHz with a power consumption of 162 mW in the core part from a single 6 V supply. The design is currently taped out.

This work studies the reconstruction of high-speed roll grinder for sculptured surfaces with high feed rates. Experiments and predictions were focused on representative surfaces of dies and molds, whose geometric complexity and complexity distribution were modified parametrically. CNC programs for machining these surfaces were executed in a HERKULES HSF2CNC machining center with a SIEMENS 840D controller, with different levels of programmed feed rate. Discrepancies between programmed and actual feed rates were evaluated. A mechanistic approach for roll grinder in high-speed milling of sculptured surfaces is proposed. The mechanistic model construction is based on: (a) the frequency distribution of linear interpolation path lengths in the CNC program and (b) a characterization of the machine tool for brisk and smooth movements. Two case studies were used to demonstrate the effectiveness of the proposed approach. The reconstruction model is capable of the manufacturing.

The design is WIFI wireless transmission module based on the control of MCU. It can achieve the point to point communication between WIFI modules. The design includes hardware schematics and wireless transmission process, describes the principle of WIFI wireless transmission based on the MCU. As it has many advantages like fast and stable, its application prospects will be broad in the life. The wireless transmission module circuit based on WIFI module was implemented in the paper. The main communication flow chart is described in detail.

Based on the unsteady incompressible three-dimensional N-S equations and standard k-ε turbulent model, Sliding Interface Method (SIM) is used to simulate the relative movement between the train and tunnel. The exchange process between the tunnel and the external atmosphere was simulated during the train traveling in subway. Meanwhile, the ventilation capability concerning such factors as train assembly, areas and length of duct were analyzed in detail. Result showed: The schematic of shafts at both end of subway station is more efficiency of ventilation, and improving the train assembly and shortening the length of shaft are helpful to enhance the air exchange of tunnel. In non-air-conditioning, the Open-MTR environmental control system model is feasible. Expanding the area of shaft would not enlarge the air exchange of tunnel efficiently.

In allusion to the current existing problems of automotive wire-harness design, which are no interaction between 2D design and 3D design, and disconnect between design level and simulation level, the advanced design methods are needed. In this paper, it puts forward a kind of automotive wire-harness design method based on CHS and PRO/E software. Then it details its design steps including schematic / layout / harness design, 3D interaction, data management, etc. Finally, it summarizes the advantages of this advanced design method.

This paper introduces the electromagnetic identification intelligent vehicles hardware system design diagram and software design process based MC9S12XSl28 microcontroller, focusing on the design of intelligent vehicle power unit circuit, the electromagnetic signal amplification circuit, the motor drive module, gives a detailed schematic. Software design give a specific design flow, integrated hardware and software design constitutes intelligent vehicles overall system.

On the basis of the autopilot control principle and the STM32F103RBT6 controller, an tracking autopilot for the leisure yacht was designed with manual steering and automatic steering function in this paper. The schematic circuit design and software design were detailedly described. Practical application confirmed that the autopilot has high reliability and good steering performance.

The current pipe fitting forming process is characterized by more than one equipment and gradually formation processes, it is high misinformation, low performance, and poor versatile inferior. Therefore, an automatic integrated system about the pipe cutting, the pipe bending, the molding pipe end and the discharging is presented in this paper. The integrated system can realize the integrated numerical control, willfully combine the whole processes, and enhance the process quality. The following works have been done: design the processes schematic, optimize the integrated pipe processes, and design the integration process system structure. The research lays the rationale for the development of the integration process numerical control equipment.

To realize the closed-cycle control of the giant magnetostricitive accurate driver sensorless, it must make the effective identification and precise extraction to the self-sensing signal of the driver. Based on the characteristic of self-permeability change of the magnetostricitive material under the effect of the external loading, establishing the electromagnetic model which can reflect the dynamic feature of the driver and the bridge circuit analysis model of GMM self-sensing driver. According to the established eletromagnetic and mechanical models, it proposes a kind of new self-sensing signal extraction technology, to make the driving function and self-sensing function to be realized by using a coil. Besides, it presents the schematic circuit diagram and analyzes the working principle of the circuit. The research of the experiment indicates that the circuit designed can successfully detect the variation of the displacement of the driver.

From the request of practical applications,according to the basic theory of IIR filters, a scheme of hardware implementation is worked out combining with the fact that coefficients of numerator and denominator of transfer function are fixed and the structural feature of selected FPGA. From the clew of implementing stratified ,modularized and parameterized design ,the thesis describes the hardware implementation of the IIR filter with VHDL and schematic diagram design method.

Altium Desinger summer 09 is a circuit board design software with more perfect software function, quick operation and strong rationality. To make the beginner grasp the PCB design process well, this paper will describe the whole process and analyze every step with a circuit example

In order to rapidly develop the control system of the Electromechanical Actuator(EMA), the DSP development platform is established using rapid prototyping method based on the MATLAB software, and all the models is configured and researched. First, the DSP development platform structure in the environment of MATLAB is mainly presented. And the operation principle has been showed. Then, the EMA control circuit board schematic diagram is necessarily introduced, which one is for the developer to conveniently configure the system model. Finally, the developer reasonably configures the control system models used in the Simulink library and constitutes them to speed closed loop control system of the EMA. The EMA control system code will be compiled and debugged rapidly through this platform. The executed program will automatically download into the DSP processor. And the result of debugging would be sent to the CAN bus receiver. For generally speaking, the difficulty of EMA control system code development method is reduced and the development cycle is shortened using this rapid prototyping method. And this system development method is fast and effective. (2013) Trans Tech Publications, Switzerland.

A sliding mode controller for buck converter based on PWM technology is discussed.Firstly, the schematic diagram of buck converter circuit based on a slidingmode control strategy is designed. Then a sliding mode control approach basedon reaching law is constructed. A circuit model based on MULTISIM is proposed.Finally, the simulation result show that the proposed method can effectively improvethe system dynamic characteristics.

Provided by ALTERA FPGA/CPLD Quartus II development software development platform. programmable timer/counter 8253s functions and internal circuitry as the basis, combined with programmable gate array (FPGA) products FLEX10KE characteristics, using VHDL hardware description language and schematic Figure two ways 8253 for hierarchical, modular, parameterized logic design. The completed design will be configured to the chip of FLEX10KE,and Proved to be correct.

Based on direct digital frequency synthesizer ( DDS ) of the working principle, designfunction signal generator based on FPGA chip as the core, the application of Verilog language andQuartus II provided by software schematic design function, completed a system circuit design, using Modelsim on the circuit in the simulation, the simulation results are analyzed, the validationof the design method for the reliability and feasibility.

Multiband transceivers are very popular nowadays. As a key component in the system, the broadband VCO is a hot research topic. This paper presents a broadband inductor capacitor voltage controlled oscillator (LC-VCO) with an adaptive frequency calibration (AFC) circuit. The VCO uses a 5-bit differential switched-capacitor array for extending the tuning range. Two couples of AMOS varactors are employed to linearize the VCO tuning gain. An AFC circuit is utilized to automatically select the optimal sub-band for the VCO by binary search algorithm.

Unlike rigid-body mechanisms, compliant mechanisms (CMs) gain some or all of their motion from relative flexibility of their joints. This paper presents a pseudo-rigid-body model (PRBM) method and virtual work to design and analyze kinematics and dynamics for compliant rotary joints or flexure hinges in the processing of compliant mechanisms. The stress at flexible pivot, the nonlinear-large deflection of flexure hinge, the relationship between displacement and force and/or torque, stress were taken into account in this work based on PRBM. A numerical software package, ANSYS, was exploited to illustrate schematic diagram of the stress versus to horizontal displacement of free end AB of flexure hinge. A mechanism with the desired structure is that one of the most popular aspects, which is needed to take into account in the design phase in advance. The results revealed that the proposed effective approach can be further easily applied in compliant mechanism structures. Future work will focus on multi-objective structural optimization of the flexure hinge.

Frequency meter as a kind of electronic measuring instruments, have been widely applied in the field of Mechanical and Electrical automation. The design of a frequency meter based on EDA technology, is implemented in EDA software platform of Quartus II, using hardware description language (HDL) editor can also be seasonal schematic, design, system hardware circuit compiler, simulation, system is divided into five modules: frequency module, control module, counting module, range switching module and display module, the hardware design requires a download chip EPM7128S and input and output circuit.

Pressure meter is an important testing and storage investment during oilfield hydraulic fracturing. The pressure meter electronic system mainly composed by the microcontroller module, battery module, temperature signal acquisition and processing module, the pressure signal acquisition and processing module and memory module. This paper briefly introduced the principle of pressure meter, and established fault tree based on schematic diagram of pressure meter electronic system and specific cause of failure; Aiming at solving traditional reliability analysis the limitation of long cycle and poor economy, the paper adopt reliability simulation by using MATLAB and combined with the theory of Monte Carlo. Ultimately,getting the reliability curve and life of pressure meter electronic system. The reliability of electronic systems gradually decreases with increasing time and obeyed exponentially distributed law; Electronic system simulation life of 2877.7 hours. In other words, the electronic system can work 2877.7 hours since down to underground of oil well. It has some guidance for engineering practice, as well as provides a measure of reliability analysis for pressure meter electronic system.

With the increase of the power demand and reduction of land resources, it is imperative to increase AC transmission line capacity. Tri-pole HVDC is proposed as a new technique to solve this problem. This paper presents the basic principle of tri-pole HVDC, including its schematic and current modulation strategy. Based on the platform of PSCAD/EMTDC a tri-pole simulation model is built to carry out the simulation on deblock startup and block shun down. Besides, a cooperation mode of the controller with the protection under emergency outage of single converter station or under fault occurred in DC transmission line is put forward, and simulation results show that the proposed control and protection strategies are effective.

This paper describes a Human-Machine interface for rudder control system based on WinCC. This interface contains the dynamic monitoring screen for rudder control system, and it can communicate with PLC and WinCC. The Human-Machine Interface has an overview schematic of steering system, and there are five sub-screens in the overview schematic including Unit screen, Measure screen, Alarm screen, Trend screen and Table screen. The display patterns of data are virtual dashboard and curves, and it can be recoded, saved and printed. The system achieves the communication between PLC and WinCC by using OPC. Experiments demonstrated that setting up a monitoring platform for industrial production achieve a visual monitoring, data acquisition and display effectively.

Aimed at the problem that the traditional data acquisition system design with low efficiency and high cost. It is proposed that the C8051F040 microcontroller is based on the integrated A/D converter and CAN controller; utilize dynamic control simulation input quantity into the built-in A/D converter, process and store the data through the micro-processing unit, and use integrated CAN controller to transmit the data. From schematics design to the boards development, we have achieved the functions that acquisition of multi-channel data combined with CAN network communication through hardware and software debugging. The design of this product is small, powerful and wide used. It has good application and development prospects.

With the increasing application of lightweight multi-materials in vehicle body, the SPR （self-piercing riveting）with half-hollow rivet is used to connect hybrid metals due to its simple operation and reliable connection. In this paper, appropriate size parameters of half-hollow rivet and die are selected according to sheets’ thickness after the determination of hybrid metal materials, namely FAS2205 dual phase steel, AA2036 aluminum alloy, AA7050 aluminum alloy, AA6061 aluminum alloy and 460E high strength steel. The finite element model of SPR with half-hollow rivets is constructed and the accuracy of which is proved by comparing with the experiment in the relative reference. What’s more, the Johnson-Cook constitutive model is taken as material model to simulate the plastic and hardening behaviors during riveting process. The influence on joint quality of the strength matching of rivet/bottom sheet is studied through numerical simulation and direct observation, and the relationship schematic diagram between them is gained. Meanwhile, the riveting joints at several uniform loading velocities are simulated and the quality of which are analyzed. The research results show that the appropriate matching of rivet to the bottom sheet strength is a key prerequisite for joint quality and the punch velocity plays an important role on the riveting joint quality and efficiency of assembly.

This thesis put forward a hydraulic wave simulation system based on valve-controlled cylinder hydraulic system, which simulated wave movement on the land. The mathematical model of valve-controlled symmetric cylinder was deduced and the mathematical models of servo valve, displacement sensor and servo amplifier were established according to the schematic diagram of the hydraulic system designed, on the basis of which the mathematical model of hydraulic wave simulation system was obtained. Then the stability of the system was analyzed. The results indicated that the system was reliable.