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Welding is a very commonly used permanent joining process. Owing to great advancement in welding technology, it has secured a prominent place in manufacturing machine components. Some typically welded machine components are Pressure vessels, steel structures, Flanges welded to shafts and axles, Crank shafts Heavy hydraulic turbine shafts, Large gears, pulleys, flywheels, Gear housing Machine frames and bases, Housing and mill-stands. In the project, the behavior of welded plates was analyzed when subjected to fatigue loading. The behavior of different types of materials like structural steel, aluminum alloy and their combinations was checked. All these analysis were completed by applying 1000N constant amplitude fully reversed.

Regenerative Braking System (RBS) converts kinetic energy into electrical energy by using a motor and functions as a generator when decelerations occur. Regenerative braking is an effective alternative to increase the driving range of a vehicle and can save around 8% - 25% of the total energy used by a vehicle. The purpose of this research is to produce a design of the Ratchet Flywheel Regenerative System and its system topology. The design of this system is to optimize the download of vehicle kinetic energy based on the duration of energy transfer that occurs. This study focuses on the flywheel energy download system and is done by numerical simulation using MATLAB software. The method to be designed is to apply of ratchet flywheel topologies.

In this paper, we propose a new experimental method for determining the moments of inertia of the ship model. The paper gives a brief review of existing methods, a description of the proposed method and experimental stand, test procedures and calculation formulas and experimental results. The proposed method is based on the energy approach with special program motions. The ship model is fixed in a special rack consisting of a torsion element and a set of additional servo drives with flywheels (reactive wheels), which correct the motion. The servo drives with an adaptive controller provide the symmetry of the motion, which is necessary for the proposed identification procedure. The effectiveness of the proposed approach is confirmed by experimental results.

The increase of collision cases experienced by two-wheeled vehicle occurs due to its unstable characteristic. In this study, double-gyroscope stabilization as a vehicle balancer system is going to be discussed. Double-gyroscope with a double flywheel direction of rotation on different directions will add greater precession torque compared with the single-gyroscope. The gyroscopic phenomenon with a double-gyroscope will show the effect of the rotation of the flywheel used. The goal of this system is to restore the tilting vehicle due to a collision to its original position of the vertical axis. The first step of this reasearch is formulation of dynamic equation of motion of two-wheeled motorcycle with two gyroscopes. The next step is to create a block diagram of the equation of motion that has been previously formulated in Simulink Matlab Software. The last step is 3D modeling of a two-wheeled motocycle using Autodesk Inventor Software. The vehicle tilt angle is used as input parameter (θ) at 0°, 1°, 2°, 3°, 4°, 5°. The result obtained from Simlink Matlab is 5600 rpm until 7544 rpmof flywheel rotation to stabilize tilt angle 0°-5° and from Autodesk Inventor result is 5700 rpm until 7700 rpm of flywheel rotation with the same tilt angle. The difference occurred due to the theoretical test, only described the state of mass component center in 2D only, while in the simulation, the system is described in 3D and has an additional component that can illustrate the angle of vehicle oscillation.

Ziziphus is the one of the most abundant plant of arid region of Rajasthan and rest part of desert land in world. There are a lots of research work going on and has been done on medical applications of this plant and it is playing very important role in economy of desert areas. In this paper our discussion will bring the attention its physical properties so that we can find the possibility of its applications in the various field of fiber reinforced composites which either can be used in such as interior & exterior part of automotive so it can reduce their overall weight, cost and improve its fuel efficiency without compromising in strength or can be used in flywheel technology for energy saving in automobiles or in building materials and so on. In this paper our approach is to extract the fiber from this plant, analyze the mechanical properties of the fiber and then discuss the various possibility of its application in appropriate field of composites. To find the possibility in FRC for Ziziphus fiber our next step is to compare it with other fibers whose composites have already been formed and studied.Ziziphus is the one of the most abundant plant of arid region of Rajasthan and rest part of desert land in world. There are a lots of research work going on and has been done on medical applications of this plant and it is playing very important role in economy of desert areas. In this paper our discussion will bring the attention its physical properties so that we can find the possibility of its applications in the various field of fiber reinforced composites which either can be used in such as interior & exterior part of automotive so it can reduce their overall weight, cost and improve its fuel efficiency without compromising in strength or can be used in flywheel technology for energy saving in automobiles or in building materials and so on. In this paper our approach is to extract the fiber from this plant, analyze the mechanical properties of the fiber and then discuss the various possibility of its application in appropriate field of composites. To find the possibility in FRC for Ziziphus fiber our...

The problem of damping of the satellite fast-linear oscillations about its center of mass on yaw and roll channels is considered. The satellite is moving along a stationary orbit and equipped with a hard spun flywheel with a kinematic momentum H. The controlled motion of the satellite can be represented by the linear ODE system with constant coefficients. The admissible control is a piecewise constant function that blanks fast frequency components of the solution of linear equations at the moment T. As “the expenditure” functional we use the integral of the sum of the modules of coordinates of the control along the interval [0, T]. The problem under consideration is to construct an admissible control which minimizes the expenditure. To solve this problem the method is proposed which leads to explicit formulas.

The type of distributed generation unit that is the subject of this paper relates to renewable energy sources, especially wind power. The wind generator used is based on a double fed induction Generator (DFIG). The stator of the DFIG is connected directly to the network and the rotor is connected to the network through the power converter with three levels. The objective of this work is to study the association a Flywheel Energy Storage System (FESS) in wind generator. This system is used to improve the quality of electricity provided by wind generator. It is composed of a flywheel; an induction machine (IM) and a power electronic converter. A maximum power tracking technique « Maximum Power Point Tracking » (MPPT) and a strategy for controlling the pitch angle is presented. The model of the complete system is developed in Matlab/Simulink environment / to analyze the results from simulation the integration of wind chain to networks.

The most important addition of modern science is renewable energy. And the most useful and the most cheaply renewable power generation source is Hydropower. Flowing water creates energy that can be captured and turned into electricity. This is called Hydroelectric power or Hydropower. Hydropower is considered a renewable energy resource because it uses the earth’s water cycle to generate electricity. Water evaporates from the earth’s surface, forms clouds, precipitates back to earth, and flows toward the ocean. As far as Bangladesh is concerned, only a small fraction of electricity is generated by hydropower. The government has set a target of meeting 5 per cent of the electricity demand by 2015 by utilizing renewable energy and 10 per cent by the year 2020. Currently, renewable energies contribute to less than 1 per cent of the country’s total electricity generation. The aim of our analysis is to demonstrate and observe the hydropower of our country in micro-scale by our experimental setup which is completely new in concept. This paper consists results of our findings and we find larger the number of stroke higher the rpm correspondingly higher efficiency. We find maximum rpm for 2stroke when fixed fly wheel weight was 18Kg and water was 10liter. It might help in case of utilizing this renewable energy potential at high scale.

This paper presents a new driving strategy to increase the operational time of flywheel hybrid module. The flywheel hybrid module contains low cost mechanical parts which installed on the small motorcycle. Based on normal driving cycles characteristics, the Mini-AD driving strategy is develop. It is involved a series of short or mini acceleration cycle and short deceleration cycle on top of the normal driving cycles. The new strategy is simulated for flywheel hybrid module, aimed for acceleration phase only. Simulations show that the new driving strategy can increase the operational time of flywheel hybrid module up to 62.5%.

This study is to examine the forming features of flow stress property and the incremental forming method with increasing the thickness of material. Recently, the optimized forming method is widely studied through the finite element analysis to optimize forming process conditions in many different forming fields. The optimal forming method should be adopted to meet geometric requirements as the reduction in volume per unit length of material such as forging, rolling, spinning etc. However conventional studies have not dealt with issue regarding volume per unit length. For the study we use the finite element method and model a gear part of an automotive engine flywheel as the study model, which is a weld assembly of a plate and a gear with respective different thickness. In simulation of the present study, a optimized forming condition for gear machining, considering the thickness of the outer edge of flywheel is studied using the finite elements analysis for the increasing thickness of the forming method. It is concluded from the study that forming method to increase the thickness per unit length for gear machining is reasonable using the finite elements analysis and forming test.

Flywheel energy storage devices comprising multi-layered composite rotor systems were investigated with a recently developed ultrasonic spectroscopy technique. The ultrasonic system employs a continuous swept sine waveform and performs a fast Fourier transform (FFT) on the frequency response spectrum. Equalization of the frequency spectrum, along with the second FFT aids in the evaluation of the fundamental resonant frequency. The responses from multi-layered material samples, with and without known defects, were analyzed to assess the capabilities and limitations of this nondestructive evaluation (NDE) technique for material characterization and defect detection.

Flywheels can exert torque that alters the Station’s attitude motion, either intentionally or unintentionally. A design is presented for a once planned experiment to contribute torque for Station attitude control, while storing or discharging energy. Two contingencies are studied: the abrupt stop of one rotor while another rotor continues to spin at high speed, and energy storage performed with one rotor instead of a counter rotating pair. Finally, the possible advantages to attitude control offered by a system of ninety-six flywheels are discussed.

The current state of our single indium ion work will be presented, with emphasis on the construction of a narrow, solid-state source of tunable UV radiation which will serve as a “clock” laser for the single-ion standard. Indium is shown to be a favorable candidate for a standard with a long term inaccuracy of less than one part in 1017. Its advantages are small systematic errors which are well-understood and relatively straightforward generation of the cooling and “clock” radiation. The stringent requirements on the long term stability of the “flywheel” clock laser and the difficulty in coherently relating the optical clock laser frequency to a convenient microwave source are problems which should soon be overcome.

The use of magnetic bearings (MB) for support of space based flywheels can provide significant improvement in efficiency due to reduction in drag torque. A NASA supported program directed through the Texas A&M Center for Space Power has been formed to advance the technology of MB’s for satellite flywheel applications. The five areas of the program are: (a) Magnetic Field Simulation, (b) MB controller Development, (c) Electromechanical Rotordynamics Modeling, (d) Testing and (e) Technology Exchange. Planned innovations in these tasks include eddy current drag torque and power loss determination including moving conductor effects, digital (DSP) based control for high speed operation, MATLAB-based coupled flexible rotor/controller/actuator electromechanical model with fuzzy logic nonlinear control, and ultra high speed>100 krpm measurement of drag torque. The paper examines these areas and provides an overview of the project.

The U.S. Flywheel Systems’ flywheel energy storage system could be the answer to a critical question: How do we replace conventional chemical batteries with a more-efficient system that lasts longer and is non-polluting? The new product, which has a virtually unlimited life expectancy, has a storage capacity four times greater per pound than conventional chemical batteries. USFS designed and built each component of the system—from the specially wound carbon fiber wheel, the magnetic bearing, the motor/generator, and the electronic control. The flywheel is designed to spin at speeds up to 100,000 rpm and deliver about 50 horsepower using a proprietary high-speed, high-power-density motor/generator that is the size of a typical coffee mug. Some of the important markets and applications for the flywheel storage system include electric vehicles, back-up power supply, peak power smoothing, satellite energy storage systems, and locomotive power.

We have designed 20 MW, 5 sec RF generator system. The duty cycle is 1/20 minutes and the frequencies are 30–71 MHz in 9 pre‐set channels. The system consists of 12 units and each unit delivers 2 MW. The total power of the power supply system is 60 MVA supplied by the flywheel and 900 kVA supplied directly by the line.