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The main obstacle to the development of large-scale electrochemical hydrogen production based on water splitting is the slow four-electron kinetics of OER (oxygen evolution reaction). The most efficient method is to create sophisticated and effective OER catalysts. Here, we proposed the controlled synthesis of high-entropy layered double hydroxides (HELDH) for wide component regulation and the component design of high OER activity to make up for the restricted component regulation in conventional catalysts. Through the use of coprecipitation and hydrothermal synthesis, the representative sample (MgCoNi) 3 (FeAl)-LDH is created and systematically characterized. Significantly, this technique of preparation may generically synthesize a variety of HELDH with various component combinations, demonstrating the remarkable adaptability of the HELDH components. Subsequently, (FeCoNi) 3 (FeCr)-LDH with high OER activity is designed and synthesized. (FeCoNi) 3 (FeCr)-LDH shows excellent OER activity (overpotential is only 230 mV at 10 mA cm -2 ). A new platform for the creation of high-performance catalysts and high-entropy materials was established by the synthesis and design of HELDH.

A long list of criteria determining the hot cracking susceptibility already exists. A main influence on solidification cracking can result from the design of the welded construction, i.e. from the influence of external loads. Using the Controlled Tensile Weldability (CTW) test, an external load hot cracking test, the influence of constant pre-load and different extension rates on the solidification cracking behavior of GTA (Gas Tungsten Arc) welds in an austenitic (AISI 309) and a ferritic (AISI 441) steel were investigated. Compared to specimens welded allowing free shrinkage and welded with an applied constant tensile pre-load, the specimens welded during the application of increasing tensile load show solidification cracks. In the weld seams, a characteristic angle α between the predominantly columnar grains and the fusion line can be observed. Specimens showing solidification cracks show a significantly larger angle α compared to the crack-free specimens. Based on these observations, the characteristic angle α is proposed as a new hot cracking criterion. [ABSTRACT FROM AUTHOR]

This current project is carried out at Philadelphia University and describes the work associated with the design, build, and test a Formula Student racing car in order to compete at Formula Student competition at UK 2014. Following the Formula Society of Automotive Engineers regulations 2014,1 this car must be a single seat car with an engine displacement not exceeding 610 cc. It is important to recognize that the design of a Formula Student racing car must involve the study of material structure, aerodynamics, suspension dynamics, internal combustion engine, selection of materials, and the requirements for manufacturing. All of these procedures must be followed to reach an optimum design. The challenge to teams is to develop a vehicle that can successfully compete in all the events (static and dynamic) described in the Formula Society of Automotive Engineers rules. This project is considered as an educational, practical, and training exercise on mechanical engineering principles for the undergraduate and graduate students. Also, it is a high performance engineering project for engineering students to acquire design concepts in automotive, engineering skills, and the freedom to express their creativity and imaginations. Finally, this project will develop experience, skills, and professionalism as ‘hands on engineers’, and hopefully to enhance automotive industry in Jordan. [ABSTRACT FROM AUTHOR]

Purpose: This study aimed to compare the position of the patella at 90° of flexion before and after implantation of two TKA models with identical tibiofemoral geometry but different trochlear and patellar designs. The hypothesis was that the design with the deeper 'anatomic' trochlea could produce more natural patellar positions. Methods: Intra-operative navigation data were collected from 22 consecutive cases that received two TKA designs (9 HLS Noetos and 13 HLS KneeTec). Both implants were cemented postero-stabilised TKAs with mobile tibial inserts and patellar resurfacing. Operations were guided by a non-image-based system that recorded relative femoral, tibial and patellar positions pre- and post-operatively. Results: The two groups exhibited little difference in femoral internal-external rotation and anterior-posterior translation during knee flexion. The two groups exhibited significant differences in patellar position at 90° of flexion. Post-operatively, the patella was similarly shifted medially relative to the femur (Noetos 6.9 mm, KneeTec 6.0 mm, n.s.). Patellar flexion was equivalent in native knees (Noetos 18.3°, KneeTec 20.5°, n.s.), but in implanted knees, it was considerably different (Noetos 6.3°, KneeTec 23.5°, p = 0.031). Conclusions: The present study compared intra-operative navigation data from two patient series that received TKA implants with identical tibiofemoral articular geometry but different patellofemoral designs. The results confirm that tibiofemoral kinematics are unchanged, but that patellar positions at 90° of flexion offer greater mechanical advantage to the quadriceps using the KneeTec than using the Noetos. The findings raise awareness of influence of patellofemoral geometry on mid-flexion kinematics and help surgeons select the most suitable implant for patients with weak quadriceps muscles or with history of patellar instability. Level of evidence: Comparative study, Level III. [ABSTRACT FROM AUTHOR]

Background: Total knee arthroplasty gives excellent objective results. Nevertheless, the subjective findings do not match the normal knee perception: Often, it depends on patellar pain onset. In this study, we analyzed clinical and radiological items that can affect resurfaced patellar tracking, and role of a patella-friendly femoral component and patellar size on patellar pain onset. Materials and methods: Thirty consecutive patients were implanted using the same-cemented posterior-stabilized TKA associated with patella resurfacing. Fifteen patients were implanted using a classical femoral component, while another 15 patients were implanted using a patella-friendly femoral component. The statistical analysis was set to detect a significant difference ( p < 0.05) in clinical and radiological outcomes related to several surgical parameters. Clinical and functional outcomes were recorded using the Knee Society Scoring System (KSS) and patellar pain with the Burnett questionnaire. Results: Mean follow-up was 25 months. KSS results were excellent in both groups. Group 2 (patella-friendly femoral model) reached a higher percentage of 100 points in the clinical and functional KSS, but there was no statistical difference. Also, no statistical differences for Burnett Questionnaire results were recorded. We had one case of patellar clunk syndrome in the standard femoral component group and one poor result in the second group. Postoperative radiographic measurements evidenced no statistical differences in both groups. In group 1 (classical femoral component), better significant result ( p < 0.05) war recorded at clinical evaluation according to the Knee Society Scoring System (KSS) in case of wider patellar component resurfaced. Conclusions: The present study reveals no statistically significant difference in the incidence of anterior knee pain between classical and 'patella-friendly' femoral components. With the particular type of implant design utilized in this study, when the classical femoral component is used, bigger patellar implant sizes (38 and 41 mm) showed superior clinical outcome. [ABSTRACT FROM AUTHOR]

The femoral component and proprietary instrumentation of a mobile-bearing unicompartmental knee arthroplasty (UKA) was redesigned with an additional peg for enhanced fixation, 15° of extra femoral surface for contact in deep flexion, more rounded profile, better fit into the milled surface, and redesigned intramedullary based instrumentation. To assess the benefit of these changes, we compared postoperative radiographs of 219 single-peg and 186 twin-peg UKAs done in 2008–2011. All surviving knees demonstrated satisfactory position and alignment with no radiolucencies observed. Radiographic analysis showed improved and consistent component positioning with the twin-peg design implanted with updated instrumentation compared with the single-peg. The radiographic benefits of improved implant positioning using the twin-peg component and updated instrumentation are clear and carry tremendous potential. More robust follow-up is imperative. [ABSTRACT FROM AUTHOR]

Purpose: The design of the trochlear compartment is crucial in patellofemoral arthroplasty (PFA), because 78 % of patients with isolated patellofemoral arthritis present concomitant trochlear dysplasia with patellar maltracking and therefore remain predisposed to post-operative patellar subluxation and dislocation. The study investigated whether current PFA implants are designed with anatomic trochlear parameters such as the sulcus angle, lateral facet height and groove orientation. Methods: Five trochlear components of commercially available PFA implants were scanned, and the generated three-dimensional surfaces were measured using engineering design software. The mediolateral trochlear profiles were plotted at various flexion angles (0°, 15°, 30° and 45°) to deduce the following variables: sulcus angle, height of lateral facet and trochlear groove orientation. Results: Four specimens had sulcus angle >144° in the 45° of flexion, and all five specimens had sulcus angle >143° in 30° of flexion. Three specimens had a facet <5 mm high through the entire range of early flexion (0°-30°), and two specimens had a facet <5 mm high beyond early flexion (30°-45°). The trochlear groove was oriented laterally in all specimens (range 1.6°-13.5°). Conclusion: Current PFA trochlear components are not always designed with anatomic parameters, and some models exhibit characteristics of trochlear dysplasia. Surgeons are therefore advised to implant components with a deep sulcus, particularly in patients with history of patellofemoral disorders, and to adapt the surgical technique and extensor mechanism if the component implanted has a shallow sulcus, to ensure normal patellar tracking. Level of evidence: III. [ABSTRACT FROM AUTHOR]

In this study, the design methodology for PHEV component design environment is proposed, which consists of power evaluation, component evaluation, component analysis and vehicle performance evaluation environments. First, PHEV simulators were developed based on the dynamic model of the target PHEV powertrain, and a PHEV control algorithm was designed based on the general power-split type PHEV using MATLAB/Simulink. Experimental results were used to validate the constructed PHEV simulators. The power evaluation environment provides the magnitude and direction of the power between components at the vehicle level at any selected time that the user wants to evaluate. The component evaluation environment is designed to evaluate the parameter behaviors of a component using the effort-flow causality relationship. The component analysis environment is designed to investigate component performance according to the variations of component parameters. The vehicle evaluation environment is designed to evaluate equivalent fuel economy at any selected time. It is expected that the design methodology of the PHEV component design environment proposed in this study can be extended to other x-EVs for evaluating and designing vehicle components. [ABSTRACT FROM AUTHOR]

Submodule construction is the problem of finding a new submodule which, together with a given submodule, provides a behavior that conforms to a given desired global behavior. A new formulation of this problem and its solution in first-order logic is presented, and it is shown how the known solutions to this problem in the context of various communication paradigms and specification formalisms can be derived. Communication paradigms are: synchronous rendezvous at several interfaces; interleaved rendezvous; input/output automata with complete or partial behavior specifications and with synchronous or interleaved communication. A new algorithm for deriving a progressive solution is also presented. [ABSTRACT FROM AUTHOR]

Purpose: Despite the frequency with which total knee arthroplasties (TKAs) are performed, whether they are best performed using all-polyethylene or metal-backed tibial components remains a controversy. The aim of the present study was to determine the advantages and disadvantages of metal-backed compared with all-polyethylene tibial components during TKAs through an evaluation of current literature. Methods: A meta-analysis and systematic review of randomized and non-randomized comparative studies comparing metal-backed with all-polyethylene tibial components during TKAs were performed. The focus of the analysis was on the outcomes of knee score, range of motion (ROM), quality of life, implant alignment, tibial migration, radiolucent line, complication, reoperation, and implant survivorship. Results: A total of 10 randomized/quasi-randomized controlled trials and 13 non-randomized comparative studies assessing 19,767 TKAs were eligible. On the basis of these studies, no significant differences were found between the 2 groups with regard to knee score, ROM, quality of life, complication, and reoperation. The findings indicated that using all-polyethylene tibial components is associated with lower continuous migration rate compared with metal-backed tibial components. Only 13 studies provided adequate data on implant survivorship during intermediate or long-term follow-up. Of these, 9 found that no statistical significance existed between the 2 groups. The other 3 studies found that using all-polyethylene components yielded a higher survival rate than using metal-backed components. Conclusions: Metal-backed tibial components had no obvious advantages over all-polyethylene tibial components in TKAs. However, this finding should be interpreted with caution due to publication bias, low methodological quality of the included studies, and different surgical interventions. Level of evidence: Therapeutic study (systematic review and meta-analysis), Level III. [ABSTRACT FROM AUTHOR]

Free-space optical (FSO) communications, also known as wireless optical communications, is a cost-effective and high bandwidth access technique and has compelling economic advantages. With the potential high-data-rate capacity, low cost and particularly wide bandwidth on unregulated spectrum, FSO communications is an attractive solution for the "last mile" problem to bridge the gap between the end user and the fiber-optic infrastructure already in place. However, also other structural conditions atmospheric losses fairly affect the signal gain communication due to the fact that communication medium is an air. In this study, a FSO component is designed using Matlab software for geometrical and atmospheric losses and integrated into OptSim 4.0 software to analyze the FSO system. Somewhat apart, signal attenuations due to the atmosphere conditions are eliminated using Erbium Doped Fiber Amplifier (EDFA). In this way, signal transmission distance is increased in comparison with the traditional FSO systems. [ABSTRACT FROM AUTHOR]

Abstract: In this present paper, a coupled 3D thermo fluid–thermo mechanical modelling approach of a plate type air pre-heater is introduced. The conjugate heat transfer within the pre-heater is numerically solved using 3D computational fluid dynamics. The model considers the discrete structure of the whole pre-heater assembly including the air channels, plates and manifold ports. Wall surface and gas temperature measurements are performed using thermocouples to validate the numerically predicted calculations. The results show good agreement, implying that the proposed model can be used in the design and process optimisation of the air pre-heater. Moreover, a submodel created from the thermofluid analysis has been used to investigate the thermomechanical behaviour of the air pre-heater manifold region using the nonlinear finite element method. The nonlinear elastic–plastic behaviour of the material has been considered. The component locations susceptible to stress could be determined. The approach results in reduced prototype costs and product development time in the design and optimisation of efficient air pre-heater designs. [Copyright &y& Elsevier]

Abstract: This study investigated the change in joint line position after posterior cruciate–retaining and posterior-stabilized total knee arthroplasty with AMK (DePuy, Warsaw, Ind) and Genesis II (Smith & Nephew, Memphis, Tenn) components. A total of 200 primary total knee arthroplasty patients were randomly selected so as to have 50 patients with each of the 4 prosthesis types. Joint line position was measured on preoperative and 2 year postoperative radiographs by both a lateral and an anteroposterior measurement method. Two-year follow-up functional data were assessed. There were no statistically significant differences in the joint line elevation between posterior-stabilized and posterior cruciate–retaining designs within the same implant system as measured on lateral radiographs. There were no differences in clinical functional outcomes in patients with variable joint line elevation. [Copyright &y& Elsevier]

In this paper, a visual marker called Coded Landmark for Ubiquitous Environment (CLUE) is proposed for easy robot manipulation using the RT-middleware component technology. Currently, home service robots are being expected to work in human living environments; however, such environments might be highly complex for robots. One of the solutions to solve such problems might be the development of structured environments for robots, such as visual marks in human living space, which could often be used in industrial fields, e.g., marked lines for mobile robots in industry. For application of structured environments from the factory to the human living environment, the affinity to humans might be important, such as marks invisible to humans, but visible to robots. In this paper, an invisible marker, CLUE, which is based on QR codes, is proposed; this will provide robots with information on the objects that are to be manipulated and visual guidance required for robot manipulation based on the RT-middleware platform. Finally, by means of actual robot applications, the method to use the proposed robot technology component is shown. [ABSTRACT FROM AUTHOR]

The article describes the development of a graphic computer tool that helps the generation of control software for a new distributed fuel management system for aircraft. It is stated that the system has been the result of a three-year European Community Research Project. The first part of the article presents the state of the art and gives some previous concepts that are necessary to understand the research framework and the employed terminology. The main ideas of the new distributed avionic system and graphical tool are described. Some experimental results in a laboratory plant simulator are also shown.

Abstract: A component may be made of different materials in its different regions to satisfy different requirements from its applications. The materials can be homogeneous ones and heterogeneous ones that include composites, functionally graded materials and heterogeneous materials with a periodic microstructure. For such a component, its design should be implemented from function requirements to its geometry, to material properties, and to material microstructures and/or constituent compositions. This paper develops a detailed approach and its corresponding computer software prototype for selecting optimal material constituent compositions and microstructures according to the determined or optimized material properties using an improved Genetic Algorithm. As an example for applying the approach and the corresponding software prototype, the material selection of different regions for a special cantilever beam made of multiphase materials is also described in the paper. [Copyright &y& Elsevier]

A system's perspective of services is contained herein. Analogous to manufacturing, services can and should also be viewed from a system's perspective. While the interdependences, similarities, and complementarities of manufacturing and services are significant, there are considerable differences between goods and services, including the shift in focus from mass production to mass customization (whereby a service is produced and delivered in response to a customer's stated or imputed needs). In general, a service system can be considered to be a combination or recombination of three essential components-people (characterized by behaviors, attitudes, values, etc.), processes (characterized by collaboration, customization, etc.), and products (characterized by software, hardware, infrastructures, etc.). Furthermore, inasmuch as a service system is an integrated system, it is, in essence, a system-of-systems (SoS) which objectives are to enhance its efficiency (leading to greater interdependency), effectiveness (leading to greater usefulness), and adaptiveness (leading to greater responsiveness). The integrative methods include a component's design, interface, and interdependency; a decision's strategic, tactical, and operational orientation; and an organization's data, modeling, and cybernetic consideration. A number of insights are also provided, including an alternative SoS view of services; the increasing complexity of systems (especially service systems), with all the attendant life-cycle design, human interface, and system integration issues; the increasing need for real-time, adaptive decision making within such an SoS; and the fact that modern systems are also becoming increasingly more human-centered, if not human-focused-thus, products and services are becoming more complex and more personalized or customized. [ABSTRACT FROM PUBLISHER]

Abstract: Components made of multi-materials become more and more important in high-tech applications. Such a component consists of several different homogeneous and/or heterogeneous materials in its different portions to satisfy the critical functional requirements from its applications. Under some working conditions, chemical reactions may be generated and relevant resultants will be produced on the interface between different materials in two adjacent material regions. Since the strength of resultants is usually much smaller than those in the two adjacent material regions, the peeling off is much easier to take place on the interface. Besides, the mismatching of material properties in two adjacent material regions can induce the stress concentration or even stress singularity, which can also cause the failure of components. In order to select suitable or optimal materials for adjacent material regions during the design of such a component, their material compatibility or affinity has to be considered, for which an effective evaluation method of the material affinity is needed. In this paper, the definitions, evaluation criteria, and calculation formula deductions of material affinities including physical and chemical affinities are developed and described in detail. As the examples for applying the evaluation method, material affinities of several material pairs under mechanical or thermal loads are evaluated and some guidelines for selecting suitable material pairs are also concluded. [Copyright &y& Elsevier]

Abstract: This paper, reports an investigation carried out on an automotive-formed suspension component that was supposed to last at least 300.000 load cycles, but that did not meet the necessary fatigue requirements. The main damaging factor was related to fretting fatigue. Design improvement, in order to avoid the fretting phenomena, was then carried out on the suspension car component. Some linear and nonlinear analyses using “cosmos works” were carried out to determine the stress state along the component. At the end, a significant improvement in fatigue life was achieved. The design improvement was obtained with a simple solution, without any further costs or component material substitution. [Copyright &y& Elsevier]

Abstract: The satisfactory design of engineering components is highly dependent on adequate information. Often this information is not available, is incomplete, or inaccurate, leading to assumptions being made, increasing the risk of possible failure. A considerable amount of data exists on the performance of materials, most of which if easily accessible facilitates design decisions. Unfortunately, these data are mostly discrete and selective, leading to gaps in knowledge, and therefore the ability to make informed decisions. This paper discusses the issues surrounding the use of available materials knowledge and its implication on the quality of design decision-making. [Copyright &y& Elsevier]

This article presents a methodology for component fabrication. Grounded on principles of manufacturing design, component-based software development has been viewed as the future trend in software development. The difficulties of missed schedules, exceeded budgets, and defective products in software development are well documented. Component-based software development presents a novel approach to software development--building an integrated whole from independent parts. It has been viewed as a possible solution for the current software "crisis," and has gained considerable attention in the software industry.

The commercial market for telecom components has had an increasing demand for laser transmitter packages with higher functionality and smaller form factor. These higher levels of integration require an optical bench platform that can incorporate multiple active and passive elements and withstand stringent reliability requirements. Furthermore, the laser package must be compatible with high-volume manufacturing. We have developed an optical platform for building hybrid (multiple active elements) optoelectronic devices in a stable, hermetically sealed package. Two novel approaches to optical packaging have been developed: a localized laser soldering process and a flexure-based lens mount with large dynamic range. We present the optical bench and component design and the results of engineering reliability testing of the assembled package. [ABSTRACT FROM PUBLISHER]

The optimisation of complex engineering design problems is highly challenging due to the consideration of various design variables. To obtain acceptable near-optimal solutions within reasonable computation time, metaheuristics can be employed for such problems. However, a plethora of novel metaheuristic algorithms are developed and constantly improved and hence it is important to evaluate the applicability of the novel optimisation strategies and compare their performance using real-world engineering design problems. Therefore, in this paper, eight recent population-based metaheuristic optimisation algorithms—African Vultures Optimisation Algorithm (AVOA), Crystal Structure Algorithm (CryStAl), Human-Behaviour Based Optimisation (HBBO), Gradient-Based Optimiser (GBO), Gorilla Troops Optimiser (GTO), Runge–Kutta optimiser (RUN), Social Network Search (SNS) and Sparrow Search Algorithm (SSA)—are applied to five different mechanical component design problems and their performance on such problems are compared. The results show that the SNS algorithm is consistent, robust and provides better quality solutions at a relatively fast computation time for the considered design problems. GTO and GBO also show comparable performance across the considered problems and AVOA is the most efficient in terms of computation time. [ABSTRACT FROM AUTHOR]

Distortion (1), residual stresses and hot cracks can facilitate significant decreases in quality characteristics of casting products. Their reduction by a suitable component design (2) and process control is therefore desirable. In the casting process, these characteristics are assumed as a result of the combination of solidification shrinkage paired with the local self-feeding and the geometric constraints imposed on the component by the mold. In gravity die casting (3) of aluminum (4) with thermally well conducting and rigid metal molds, the control of solidification through a localized adjustment of the heat balance (5) appears to be a suitable approach to minimize these effects. The development of an experimental setup for the assessment of the interdependencies of the alloy, casting geometry and cooling are described in this work. A first series of experiments with A356 aluminum alloy and the introduction to the different methods of evaluation are presented. Furthermore, an approach to improve the understanding of the underlying mechanisms is outlined. [ABSTRACT FROM AUTHOR]

The objective of this work is to investigate the use of metallurgical gradients (MG) in the design of structural components made of ductile cast iron (DCI). MG have been realized in this study by locally varying the pearlite fraction of the matrix. Exemplarily, the allowable cyclic load for a drive shaft as well as the allowable static displacement are calculated. The performed calculations are based on static and cyclic strength data of four different DCI with amounts of pearlite ranging from 0% to 96.8%. To show the advantage of the purposeful usage of local MG, ten different configurations are examined by numerical simulation studies of a generic drive shaft comprising a circumferential notch. Four configurations are calculated assuming homogenous material throughout the entire component. In the other six configurations the surface region of the notch root has an increased amount of pearlite. For each configuration the allowable multiaxial cyclic load by combinations of torsion and bending was calculated and subsequently the allowable static bending displacement. The results show that the targeted realization of MG results in a significant increase in the multiaxial fatigue strength of the shaft as well as in a slight improvement of the allowable static bending displacement. [ABSTRACT FROM AUTHOR]

• Honey formation optimization (HFO) is proposed as a framework for artificial bee colony algorithms (ABC), which improves the effectiveness of current ABC variants. • The work proposes new optimization algorithms: HFO-ABC and HFO-GABC with their performance tests on well-known 9 benchmark functions. • Each food source has its own associated honey form which is conceptually decomposed into components by using solution decomposition or function decomposition. • The results show that HFO framework increases the exploitation and exploration abilities of ABC variants significantly. In this paper, Honey Formation Optimization (HFO) Framework is proposed for design problems where the functions of the objective functions are known or under design. We applied HFO framework to three ABC variants, namely, ABC, GABC and ABC/Best/1 by adapting their local search strategies into HFO. Thus, 6 algorithms consisting of 3 ABC variants (ABC, GABC, ABC/Best/1) and 3 HFO variants (HFO-ABC, HFO-GABC, HFO-ABC/Best/1) are comparatively studied. The HFO-GABC and HFO-ABC/Best/1 algorithms are our new contributions to the literature. The HFO considers a food source consisting of multiple components, and models the honey formation inside bees as a process of mixing the components with their special enzymes according to a honey function. Each food source has its own associated honey form. Thus, HFO looks for the best honey form. HFO requires component design where component function measures the amount of component (component fitness) in a food source and the honey function maps the components to honey amount (quality) to measure the honey fitness. HFO generalises the ABC by considering worker bees that exploit only the selected components of the food sources. In this paper, the 6 algorithms are compared on the basis of 14 benchmark functions, alongside demonstration of the component design. The results show that HFO variants increase the exploitation and exploration abilities of ABC variants significantly. [ABSTRACT FROM AUTHOR]

The oxygen compressor is one of the key components in the onboard oxygen generating system (OBOGS), with a high-pressure canister for backup. In this paper, a multistage compressor unit with a non-crank mechanism is proposed for the compression of the generated oxygen for storage in the high-pressure canister in the oxygen backup line of the OBOGS. The working principle, control strategy, and the design method of the key components of the non-crank compressor are provided to realize the preliminary design. The experimental study was carried out to investigate the control accuracy and the technical feasibility, including the compression capacity and the cooling performance. Results show that the motion control program could realize the motion scheme of the compressor with an error of less than 2%. The discharge pressure reached a relative stability after around 40 cycles of compression, while the discharge temperature achieved relative stability after approximately 100 cycles. The average discharge pressure at the last stage could meet the pressure requirement under standard working conditions. The average inlet temperature of the oxygen to the gasholder was 25 °C under standard working conditions. [ABSTRACT FROM AUTHOR]