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Life prediction and test period optimization research based on small sample reliability test of hydraulic pumps

High technology Letters 2017年第1期23卷 63-70页

作者：郭锐 Ning Chao Zhao Jingyi Wang Ping Shi Yu Zhou Jinsheng Luo Jing Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan UniversityKey Laboratory of Advanced Forging&Stamping Technology and Science(Yanshan University)Qinhuangdao 066004P.R.China Huachuang Tianyuan Industrial Developing Co. LtdLangfang 065000P.R.China College of Art and Design Yanshan UniversityQinhuangdao 066004P.R.China Beijing Research Institute of Automation for Machinery Industry Beijing 100120P.R.China

Hydraulic pumps belong to reliable long-life hydraulic components. The reliability evaluation includes characters such as long test period,high cost,and high power loss and so on. Based on the principle of energy-saving and power recovery,a small sample hydraulic pump reliability test rig is built,and the service life of hydraulic pump is predicted,and then the sampling period of reliability test is optimized. On the basis of considering the performance degradation mechanism of hydraulic pump,the feature information of degradation distribution of hydraulic pump volumetric efficiency during the test is collected,so an optimal degradation path model of feature information is selected from the aspect of fitting accuracy,and pseudo life data are obtained. Then a small sample reliability test of period constrained optimization search strategy for hydraulic pump is constructed to solve the optimization problem of the test sampling period and tightening end threshold,and it is verified that the accuracy of the minimum sampling period by the non-parametric hypothes is tested. Simulation result shows it could possess instructional significance and referenced value for hydraulic pump reliability life evaluation and the test's research and design.

关键词： hydraulic pump small sample test volumetric efficiency degradation path model life span period optimal

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Study on Feature Extraction of Fault Vibration Signal of Hydraulic Pump Under Square-wave Loading Condition

Study on Feature Extraction of Fault Vibration Signal of Hyd...

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第六届工程机械与车辆工程新进展国际学术会议

作者： Zhang Jian-jiao Zhang Geng-xin Yang Meng-xue Liu Si-yuan Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China Yanshan University

The change of load will cause the hydraulic pump shaft drive motor speed to fluctuate,it will cause the vibration characteristics caused by hydraulic pump fault to change when the fluctuation is exces

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Influence Analysis of Strong Impact Load on Load-bearing Characteristics of Swash Plate Pump Slipper Pair

Influence Analysis of Strong Impact Load on Load-bearing Cha...

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第六届工程机械与车辆工程新进展国际学术会议

作者： J.X.Liu S.Y.Liu G.X.Zhang Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China Yanshan University

The strong impact load is one of the main reasons of slipper pair wear of swash plate pump,which seriously affects the load-bearing characteristics of slipper pair and service life of swash plate pump

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Prediction of Critical Conditions for Dynamic Recrystallization in 316LN Austenitic Steel

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Journal of Iron and Steel Research International 2016年第3期23卷 238-243页

作者： Xin-gang LIU Li-ge ZHANG Rong-sheng QI Lei CHEN Miao JIN Bao-feng GUO Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China Yanshan University Library Yanshan University National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University

Hot compression experiments conducted on a Gleeble-3500thermo-mechanical simulator and metallographic observation tests were employed to study the critical conditions of dynamic recrystallization（DRX）of 316 LN austenitic stainless *** true stress-true strain curves of 316 LN were obtained at deformation temperatures ranging from 900℃to 1 200℃and strain rates ranging from 0.001s-1 to *** on the above tests,the critical conditions of DRX were determined and compared with those obtained from work-hardening theory and the Cingara-McQueen flow stress ***,the microstructure was observed to validate the calculated *** ratio of critical strain to peak strain（εc/εp）for 316 LN was determined,and the quantitative relationship between the critical strain and the deformation parameters of 316 LN was *** results demonstrated that the onset of DRX corresponds to the constant normalized strain hardening rate（Γ）,namely,the critical strain hardening rateΓcfor316LN is equal to 0.65.

关键词： 316LN austenitic stainless steel hot deformation dynamic recrystallization critical condition

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Reliability Evaluation of Axial Piston Pump based on Degradation Failure

Reliability Evaluation of Axial Piston Pump based on Degrada...

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第六届工程机械与车辆工程新进展国际学术会议

作者： Rui Guo Jinsheng Zhou Chi Zhang Jingyi Zhao Yi Zhang Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University College of Mechanical Engineering Yanshan University

Axial piston pump is very important in the hydraulic system,and its health affects the entire system *** wear and tear of the port plate pair is the main reason for the decrease of the axial

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Research of refrigeration system for a new type of constant temperature hydraulic tank

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High technology Letters 2016年第4期22卷 436-444页

作者：郭锐 Zhang Zhenmiao Zhao Jingyi Ning Chao Li Bingliang Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan UniversityKey Laboratory of Advanced Forging & Stamping Technology and Science ( Yanshan University) Lianyungang Tianming Equipment Co. Ltd

Different from the traditional hydraulic oil cooling method,a new type of constant temperature oil tank cooling system based on semiconductor refrigeration technology is designed. This paper studies the principle of semiconductor refrigeration and establishes a heat transfer model. Semiconductor cooler on piping refrigeration is simulated,and influence of the parameters on the outlet temperature,such as pipe pressure difference of inlet and outlet,pipe length,pipe radius,are gotten,and then hydraulic tank semiconductor refrigeration system is proposed. The semiconductor refrigeration system can control temperature at 37 ± 1°C.

关键词： refrigeration system constant temperature control semiconductor refrigeration technology hydraulic tank simulated analysis experimental study

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Dynamic Topology Multi Force Particle Swarm Optimization Algorithm and Its Application

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Chinese Journal of Mechanical Engineering 2016年第1期29卷 124-135页

作者： CHEN Dongning ZHANG Ruixing YAO Chengyu ZHAO Zheyu Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao 066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China Qinhuangdao 066004 China Hebei Provincial Key Laboratory of Industrial Computer Control Engineering Yanshan University Qinhuangdao 066004 China

Particle swarm optimization （PSO） algorithm is an effective bio-inspired algorithm but it has shortage of premature convergence. Researchers have made some improvements especially in force rules and population topologies. However, the current algorithms only consider a single kind of force rules and lack consideration of comprehensive improvement in both multi force rules and population topologies. In this paper, a dynamic topology multi force particle swarm optimization （DTMFPSO） algorithm is proposed in order to get better search performance. First of all, the principle of the presented multi force particle swarm optimization （MFPSO） algorithm is that different force rules are used in different search stages, which can balance the ability of global and local search. Secondly, a fitness-driven edge-changing （FE） topology based on the probability selection mechanism of roulette method is designed to cut and add edges between the particles, and the DTMFPSO algorithm is proposed by combining the FE topology with the MFPSO algorithm through concurrent evolution of both algorithm and structure in order to further improve the search accuracy. Thirdly, Benchmark functions are employed to evaluate the performance of the DTMFPSO algorithm, and test results show that the proposed algorithm is better than the well-known PSO algorithms, such as gPSO, MPSO, and EPSO algorithms. Finally, the proposed algorithm is applied to optimize the process parameters for ultrasonic vibration cutting on SiC wafer, and the surface quality of the SiC wafer is improved by 12.8% compared with the PSO algorithm in Ref. [25]. This research proposes a DTMFPSO algorithm with multi force rules and dynamic population topologies evolved simultaneously, and it has better search performance.

关键词： force rule MFPSO algorithm FE topology DTMFPSO algorithm parameter optimization

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Stiffness analysis of a planar 3-RPS parallel manipulator

Lecture Notes in Mechanical Engineering

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Lecture Notes in Mechanical Engineering 2017年 13-28页

作者： Hu, Bo Song, Chunxiao Li, Bo Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University QinhuangdaoHebei066004 China Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of National Education Yanshan University QinhuangdaoHebei066004 China

This paper studied the stiffness model and characteristics of a planar 3-RPS PM with 3-DOF. The 6 × 6 form stiffness matrix of the planar 3-RPS PM is derived with both active and constrained wrenches considered. To characteristic the stiffness of the planer 3-RPS PM, two decomposition methods including the eigenscrew decomposition and the principle axes decomposition are applied to the stiffness matrix. The stiffness matrix decomposition provides a physical interpretation and allows the identification of the compliant axes of the planar 3-RPS PM. © Springer International Publishing Switzerland 2017.

关键词： Stiffness

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Study on co-simulation model of forging manipulator based on virtual prototyping

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High technology Letters 2016年第2期22卷 128-134页

作者：翟富刚 Zhu Hanyin Wu Qilei Kong Xiangdong School of Mechanical Engineering Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University

Based on the characteristics of integrated virtual prototype technology, the mechanical system sub-model, the hydraulic system sub-model and the control system sub-model of a forging manipula- tor system have been built using a variety of software, and a forging manipulator mtrltidisciplinary co- simulation model has been also built using a method of simulation models interface. Then the simu- lation and experiment are finished, and the result of the experiment is in good agreement with the re- sult of the simulation. It shows that the co-simulation model established can simulate accurately pa- rameter changes in real time during the moving of the forging manipulator such as displacement, ve- locity and pressure flow, which is of important significance for the optimized design of the forging manipulator system to establish the models.

关键词： forging manipulator virtual prototype co-simulation control characteristics

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Simulation and Experimental Research of Digital Valve Control Servo System Based on CMAC-PID Control Method

Simulation and Experimental Research of Digital Valve Contro...

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第六届工程机械与车辆工程新进展国际学术会议

作者： ZHAO Jin-song ZHAO Zi-ning WANG Zhi-peng ZHANG Chuan-bi YAO Jing Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China School of Mechanical Engineering Yanshan University

Digital valve control servo system is studied in this *** order to solve the system problems of poor control precision and slow response time,this paper proposes a CMAC-PID(Cerebellar model artic

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