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IEEE International Conference on Aircraft Utility Systems

作者： Lingxiao QUAN Qiwei ZHANG Zongxia JIAO Jianwei LIU Song Liu Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control and Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China Yanshan University School of Mechanical Engineering Yanshan University

ISBN: (纸本)9781509010882

The mechanical vibration transfer path model of the axial piston pump was established for aiming at the aviation hydraulic vibration that it has been more intense with the development trend of high speed and high pressure. In this paper, firstly, based on the first-order trajectory sensitivity method to solve the time-domain sensitivity function curves, the system parameters that have influence on the vibration response of the pump were determined. Secondly, two sensitivity measure indexes were defined to quantitative analysis of the effect that various parameters on the rear shell vibration displacement. We hope that the work in this paper can have some benefit for controlling the aircraft hydraulic system machinery vibration coming from the pump, optimizing the structure of aviation hydraulic pump and promoting the development of domestic large aircraft, providing theoretical and technical basis.

关键词： Transmission Path axial piston pump Mechanical Vibration system parameter Pumps aviation High speed hydraulic oscillation

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Dynamics Parameter Identification and Control of a Spherical 2-DOF Redundant Driven Parallel Robot System

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Zhongguo Jixie Gongcheng/China Mechanical Engineering 2019年第16期30卷 1967-1975页

作者： Li, Yongquan Wu, Pengtao Zhang, Yang Zhang, Lijie Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University QinhuangdaoHebei066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science Ministry of Education Yanshan University QinhuangdaoHebei066004 China Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University QinhuangdaoHebei066004 China

A spherical 2-DOF redundant drive parallel robot driven by servo motor was the research ***, the inertia parameter identification model of the mechanisms was established, and the inertial parameter identification trajectory was ***, the friction parameter identification model of the mechanism pairs and the friction parameter identification model of the driving system were established, and their identification principles were analyzed *** trajectory of friction parameter identification was also ***, through the identification experiments, the mechanism inertia parameters, the mechanism rotation pair friction parameters and the driving system friction parameter identification results were obtained, the original mechanism parameters were modified by the identification results, a more accurate robot system dynamics model was obtained, and the identification results were validated by the trajectory test ***, a feed forward control strategy was developed based on the dynamics model of the robot system and compared with the traditional mechanism kinematics closed-loop control *** feasibility of this control strategy was proved. © 2019, China Mechanical Engineering Magazine Office. All right reserved.

关键词： Mechanisms

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Environmental Stress Analysis of the Aviation Hydraulic Pipeline Effected by the Hydraulic Pressure

Environmental Stress Analysis of the Aviation Hydraulic Pipe...

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2016 IEEE/CSAA International Conference on Aircraft Utility Systems(AUS)

作者： Lingxiao Quan Xu Ding Junqiang Shi Hui Yu Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control and Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of ChinaYanshan University School of Mechanical Engineering Yanshan University

China’s first self-developed aircraft C919 has been assembly *** in the ability to analyze the environmental stress of aviation pipeline will result in less reliability and higher failure rate of aircraft hydraulic system under variable environment *** we have selected a straight pipeline and a bend one of the wing position,and whose environmental stress were analyzed on ABAQUS ***,the article gave the three-dimensional model and provided the relevant *** mathematical model of straight pipeline and bend pipeline were established with the transfer matrix *** but not the least,we have completed straight pipeline stress distribution analysis under different shock pressures and static pressure,analysis of bend pipeline modal and vibration *** results will support guidelines for research of aviation hydraulic pipeline stress,which also will be significant for the next step with optimal design of aircraft hydraulic pipeline.

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Active Disturbance Rejection Trajectory Tracking Control for Two-Joint Driven by Pneumatic Artificial Muscles

Active Disturbance Rejection Trajectory Tracking Control for...

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2015 International Conference on Fluid Power and Mechatronics

作者： Ling Zhao Linlin Ge Yafei Yang 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 Electrical Engineering Yanshan University

Active disturbance rejection control is proposed to study the problems on trajectory tracking and decoupling for a two-joint system driven by pneumatic artificial muscles. Because of coupling and nonlinearity, it is very hard to obtain good performance in trajectory tracking for the two-joint system. The active disturbance rejection nonlinear controller includes a tracking differentiator, an extended state observer and a nonlinear error feedback controller. The tracking differentiator is introduced to arrange a transitional process to track input signal and get differential signal. The extended state observer is designed to estimate the non-linearity of system. The nonlinear error feedback controller is designed to improve the performance of system. Simulation results are given to show the effectiveness of proposed controller in this paper.

关键词： Active disturbance rejection control two-joint system decoupling control pneumatic artificial muscle

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Axial piston pump mechanical vibration transmission path and the rear shell sensitivity analysis

Axial piston pump mechanical vibration transmission path and...

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2016 IEEE/CSAA International Conference on Aircraft Utility Systems(AUS)

作者： Lingxiao QUAN Qiwei ZHANG Zongxia JIAO Jianwei LIU Song Liu Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control and Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of ChinaYanshan University School of Mechanical Engineering Yanshan University

The mechanical vibration transfer path model of the axial piston pump was established for aiming at the aviation hydraulic vibration that it has been more intense with the development trend of high speed and high *** this paper,firstly,based on the first-order trajectory sensitivity method to solve the time-domain sensitivity function curves,the system parameters that have influence on the vibration response of the pump were ***,two sensitivity measure indexes were defined to quantitative analysis of the effect that various parameters on the rear shell vibration *** hope that the work in this paper can have some benefit for controlling the aircraft hydraulic system machinery vibration coming from the pump,optimizing the structure of aviation hydraulic pump and promoting the development of domestic large aircraft,providing theoretical and technical basis.

关键词： Axial piston pump mechanical vibration transmission path and the rear shell sensitivity analysis

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A precise frequency-domain integral method of vibration acceleration signal

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ICIC Express Letters 2015年第6期9卷 1617-1624页

作者： Zhu, Yong Jiang, Wanlu Hu, Haosong Kang, Hongzhi Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University No. 438 Hebei Street Qinhuangdao China Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Education Yanshan University No. 438 Hebei Street Qinhuangdao China

Aiming at the defects of traditional frequency-domain integral (TFDI), a precise FDI (PFDI) based on vibration intensity (VI) and feature component extraction (FCE) was proposed. This method applied the merits of ensemble empirical mode decomposition (EEMD), and merged the superiorities of kurtosis, mean square error, energy and singular value decomposition (SVD) on feature extraction. The connotative feature components were extracted, and the desired signal was precisely reconstructed. Meanwhile, the optimal lower limit of cut-off frequency was determined according to the mutation feature of VI. Results indicate that the interference problem of invalid signal is commendably solved. Moreover, the low-frequency error is effectively overcome. © 2015 ICIC International.

关键词： Mean square error

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Force Analysis of the Overconstrained Mechanisms Based on Equivalent Stiffness Considering Limb Axial Deformation

Research Square

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Research Square 2021年

作者： Guo, Jinwei Zhao, Yongsheng Chen, Bo Zhang, Guoxing Xu, Yundou Yao, Jiantao Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science Ministry of National Education Yanshan University Qinhuangdao066004 China

Considering the limb axial deformation, taking typical 2SS+P and 7-SS passive overconstrained mechanisms, 2SPS+P and 7-SPS active overconstrained mechanisms, and 2SPS+P and 7-SPS passive-input overconstrained mechanisms as examples, a new force analysis method based on the idea of equivalent stiffness is proposed. The equivalent stiffness matrix of passive overconstrained mechanism is derived by combining the force balance and deformation compatibility equations with consideration of axial elastic limb deformations. The relationship between the constraint wrench magnitudes and the external force, limb stiffness is established. The equivalent stiffness matrix of active overconstrained mechanism is derived by combining the force balance and displacement compatibility equations. Here, the relationship between the magnitudes of the actuated wrenches and the external force, limb stiffness is investigated. Combining with the equivalent stiffness of the passive overconstrained mechanism, an analytical relationship between the actuated forces of passive-input overconstrained mechanism and the output displacement, limb stiffness is explored. Finally, adaptability of the equivalent stiffness to overconstrained mechanisms is discussed, and the effect of the limb stiffness on overconstrained mechanisms force distribution is revealed. © 2021, CC BY.

关键词： Stiffness

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Incentives of nonlinear dynamics behaviors in electro-hydraulic servo system

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ICIC Express Letters 2015年第1期9卷 231-236页

作者： Zhu, Yong Jiang, Wanlu Liu, Siyuan Liu, Zhiqiang Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University No. 438 Hebei Street Qinhuangdao China Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Education of China Yanshan University No. 438 Hebei Street Qinhuangdao China

Based on the nonlinear dynamics principle, the nonlinear dynamic model of electro-hydraulic servo system (EHSS) was established. The influence laws of nonlinear spring force and friction on dynamic characteristics of EHSS were explored. Moreover, the bifurcation characteristics arising from primary excitations were investigated. The incentives of nonlinear dynamics behaviors (NDBs) in EHSS were revealed. Results show that the dynamic differential equations of EHSS can be described by Duffing-Van Der Pol equation. When EHSS is in working, excitation force, spring force nonlinear term and damping can result in complicated NDBs. The results can provide theoretical guidance for the parameter optimization during EHSS designing.

关键词： Dynamics

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Dynamic Characteristics Analysis Of Axial Piston Pump Slipper Pair With Wear Fault

Dynamic Characteristics Analysis Of Axial Piston Pump Slippe...

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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 Geng-xin Zhang Jian-jiao Wang Chuang Liu Si-yuan Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science Ministry of Education of ChinaYanshan University CRRC Nanjing Puzhen Co. Ltd.

Considering development mechanism of slipper pair wear fault,the mathematical description equation of slipper wear loss and wear profile was presented,and was used to be wear correction quantity to es

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Research on a kind of leg-wheel stair-climbing wheelchair

Research on a kind of leg-wheel stair-climbing wheelchair

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IEEE International Conference on Mechatronics and Automation

作者： Hongbo Wang Li He Qi Li When Zhang Dong Zhang Peng Xu Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao Hebei Province China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao Hebei Province China

ISBN: (纸本)9781479939800

A kind of leg-wheel stair-climbing wheelchair is proposed. The device adopts a leg-wheel composite structure. Both leg type and wheel type can achieve the function of climbing stairs independently, but together they complement each other nicely to strengthen the performance. Stair climbing is completed by coordinating the movement of the legs and the mobile system. There are two control schemes proposed in the control system. Two different kinds of motors, including DC servo motors and DC motors, are controlled. The device has simple operation and good performance which can realize the free conversion from ground model to stair model.

关键词： Conferences Mechatronics Automation

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