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2023 International Conference on Computer Graphics, Artificial Intelligence, and Data Processing, ICCAID 2023

作者： Chen, Yanjiang Lin, Junqin Yu, Zhiyuan Zheng, Zaiping Fu, ChunYu Huang, Kui Laboratory of Aerospace Servo Actuation and Transmission Beijing Research Institute of Precise Mechatronics and Controls Beijing100000 China

ISBN: (纸本)9781510677685

At present, multi-agent reinforcement learning(MARL) is in the initial stage of development, and research on strongly coupled multi-agent reinforcement learning is not in-depth. We propose a deep reinforcement learning network architecture for multi-heterogeneous robot systems based on a global status simulation platform. This architecture is based on clipped PPO and constructs a strategy model by constructing the full state action space and full action space of multi-heterogeneous robots. We trained and tested the algorithm on a multi-heterogeneous robot simulation platform, and the results showed that the proposed method can effectively target artificially fixed strategies and achieve victory. © 2024 SPIE.

关键词： Network architecture

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Research on high-speed milling of high-strength steel 10

Research on high-speed milling of high-strength steel

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2024 10th International Forum on Manufacturing Technology and Engineering Materials, ICMTEM 2024

作者： Luo, Zhiwen Huang, Kui Yuan, Guifang Liang, Binyan He, Chao Liu, Hongwei Beijing Institute of Precision Mechatronics and Controls Beijing100076 China Laboratory of Aerospace Servo Actuation and Transmission Beijing100076 China

PCrNi3MoVA is a prevalently employed high-strength steel, primarily utilized in aerospace, the national defense industry, the nuclear industry, medicine, and other domains. This study mainly probed into the milling forces and surface roughness of PCrNi3MoVA steel when it was milled at high speed with a 10 mm solid carbide end mill on the side and made a comparison by end milling. The primary factors influencing surface roughness and milling forces in both milling approaches were determined, and a prediction model for cutting forces was obtained. © Published under licence by IOP Publishing Ltd.

关键词： Milling (machining)

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Multiple Resonant Load Characteristics and Control Strategy of Electro-Hydraulic Actuator for Launch Vehicles 9

Multiple Resonant Load Characteristics and Control Strategy ...

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9th International Conference on Fluid Power and mechatronics, FPM 2023

作者： Chen, Keqin Xiao, Xue Zhao, Yingxin Huang, Mingming Beijing Institute of Precision Mechatronics and Controls Laboratory of Aerospace Servo Actuation and Transmission Beijing China

ISBN: (纸本)9798350304947

The China's new generation of launch vehicles adopt high thrust liquid oxygen-kerosene engines, aiming at its load characteristics of heavy inertia, low structural natural frequency and multiple resonance frequency, a high-order spring-mass physical model and a normalized control model of an electro-hydraulic actuator were developed. A combined control strategy based on the whole interested frequency range was proposed, including the piecewise feed-forward, the nonlinear PID and the multiple notch filter. The parameters of the normalized control model were identified by the frequency scanning tests of electro-hydraulic actuators frequency and optimized based on Particle Swarm Optimization algorithm. The approach has been demonstrated by simulation analysis and trial experiment, the dynamic performances met all the amplitude and phase requirements at the selected frequencies of the electro-hydraulic actuators for launch vehicle. The result shows that appropriate high-order normalized control model and combined control strategy are enabling contributors to obtain satisfactory high dynamic performance. © 2023 IEEE.

关键词： Launch vehicles

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Intelligent Power Management System for Vehicle

Intelligent Power Management System for Vehicle

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2023 IEEE International Conference on Power Science and Technology, ICPST 2023

作者： Xu, Xiuhua Zhao, Xu Wang, Kaichun Zhang, Yiqi Yue, Cairui Beijing Institute of Precision Mechatronics and Controls Laboratory of Aerospace Servo Actuation and Transmission Beijing China

ISBN: (纸本)9798350311358

Integrated power system of vehicle integrates the traditionally independent propulsion system and power system in the form of electric energy. This paper presents a reliable and stable power management system. This system mainly provides energy for electrical equipment, and is responsible for the real-time control, fault diagnosis and protection of each subsystem equipment. It realizes the functions of multi-channel independent high and low voltage transformation isolation power supply, modular design of power distribution, residual power supply of key equipment, etc. The principal prototype and system test show that the intelligent power management system operation parameters and status in real time. Power system supply and outage relocation, providing stable and continuous high-quality energy for the propulsion load and other loads. © 2023 IEEE.

关键词： Fault tolerance

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High-Performance Continuous Control Set-Model Predictive Control for Three-Phase Two-Level Power Converters 26

High-Performance Continuous Control Set-Model Predictive Con...

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26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Lin, Hao Zhao, Yufei Zhang, Jing Qi, Chong Zhao, Hui Beijing Institute of Precision Mechatronics and Controls Laboratory of Aerospace Servo Actuation and Transmission Beijing China

ISBN: (纸本)9798350317589

Three-phase two-level power converter has become one of the most commonly used converters in industrial applications due to its high efficiency, bidirectional power flow and simple structure. In this paper, a simple and efficient high-performance continuous control set-model predictive control strategy is proposed for the three-phase two-level converter, which improves the quality of phase currents with suppressed power oscillation, disturbance rejection ability and dynamic performance. Through the simulation comparison with different strategies in different conditions, the feasibility and superiority of the proposed strategy are validated. © 2023 IEEE.

关键词： Model predictive control

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Design of a Multi-axis Motion Control System for Smart Hands Based on SOC 19th

Design of a Multi-axis Motion Control System for Smart Hands...

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19th Chinese Intelligent Systems Conference, CISC 2023

作者： Li, Pengfei Wang, Shouhao Lv, Bohan Zhang, Junning Zhao, Qing Liu, Shuxuan Laboratory of Aerospace Servo Actuation and Transmission Beijing Research Institute Precision Mechatronics and Controls Beijing100076 China

ISBN: (纸本)9789819968855

In order to address the issues of low flexibility and poor synchronization in multi axis motion control systems, as well as the integration and coordination of dexterous hands, a multi axis motion control system for dexterous hands based on System on Chip was designed and implemented. This system is composed of upper computer software and motion controller. The upper computer is responsible for setting parameters and receiving feedback information;The motion controller is responsible for the planning of the control algorithm, the driving of the motor and the real-time acquisition of the signal, and storing the alarm information for the user to analyze the abnormality. Finally, perform performance testing on the entire system. The results indicate that the control system has good stability, strong controllability, and high synchronization, which is helpful for the collaborative control of dexterous hands and is of great significance for the development of motion control systems. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： System-on-chip

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Coupled evolution of piston asperity and cylinder bore contour of piston/cylinder pair in axial piston pump

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Chinese Journal of Aeronautics 2023年第8期36卷 395-407页

作者： Fei LYU Junhui ZHANG Shoujun ZHAO Kun LI Bing XU Weidi HUANG Haogong XU Xiaochen HUANG State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Beijing Institute of Precision Mechatronics and Controls Beijing 100076China Qing’an Group Co. Ltd.Xi’an 710077China

The wear condition of the piston/cylinder pair is crucial to the performance and reliability of the axial piston *** hard piston surface,the soft cylinder bore surface,and the interface oil film affects each other during the wear ***,in the mixed lubrication region,the geometry of the hard piston surface asperity directly affects the wear of soft cylinder bore surface,while the asperities may deform or even degrade when penetrating and sliding against the cylinder *** far,there is no suitable method to simulate their coupled *** paper proposed a wear process simulation model considering the real-time interaction between the elasto-plastic deformation of the piston surface asperity,the wear contour of the cylinder bore,and the lubrication condition of the *** offline library of the elasto-plastic constitutive behavior of the asperity based on the finite element method(FEM)is established as a part of the simulation model to precisely analyze the deformation and degradation of the asperity and quickly invoke them in the numerical wear process *** simulation and experimental results show that the piston asperity and the cylinder bore contour converge to a steady state after running-in for about 0.5 *** distribution of the simulated asperity degradation and wear depth is also verified by the experiment.

关键词： Asperity Contour Coupled evolution Piston/cylinder pair Wear process

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Performance optimization for high speed axial piston pump considering cylinder block tilt

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Chinese Journal of Aeronautics 2023年第9期36卷 437-450页

作者： Haogong XU Junhui ZHANG Shoujun ZHAO Junyuan CHEN Weidi HUANG Xiaochen HUANG Fei LYU Qi SU Bing XU State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058China Beijing Institute of Precision Mechatronics and Controls Beijing 100076China Jiangsu Jinling Intelligent Manufacturing Research Institute Co LtdNanjing 210006China

Increasing the rotating speed is considered as an efficient approach to upgrade the power-to-weight ratio in an axial piston pump,but penalized by more leakage and more severe wear resulting from the adverse cylinder block *** studies mainly focused on the bearing characteristic of the valve plate/cylinder block pair,but the spline coupling also plays a key role in the undesired cylinder block tilt,which has been little studied.A theoretical model for the rotating assembly is presented to investigate the effect of the spline coupling length on the cylinder block tilt and the performance of the valve plate/cylinder block pair.A typical high-speed axial piston pump with the displacement of 5.2 mL/r at 10000 r/min was studied by simulation and *** shows that the optimal spline coupling length is one value increased by 2 mm from the original,bringing a remarkable leakage reduction under the high-speed condition by decreasing the cylinder block tilting *** experiment result matches well with the *** influences of the spline coupling on the cylinder block tilt and the leakage were demonstrated.

关键词： Cylinder block tilt High-speed axial piston pump Leakage Spline coupling Wear

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Experimental Research on Surface Integrity of High Strength Steel Turning by Analysis of Variance Method 19th

Experimental Research on Surface Integrity of High Strengt...

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19th Chinese Intelligent Systems Conference, CISC 2023

作者： Luo, Zhiwen Huang, Kui He, Chao Zhang, Junning Wang, Qu Cai, He Beijing Institute of Precision Mechatronics and Controls Beijing100076 China Laboratory of Aerospace Servo Actuation and Transmission Beijing100076 China

ISBN: (纸本)9789819968855

To study the change rule of surface integrity evaluation index of high strength steel affected by cutting parameters. Single factor and orthogonal experiments were designed, and the turning tests were carried out on high-strength steel with coated carbide cutter. The effects of cutting depth, feed speed and cutting speed on surface roughness, residual stress, microhardness and surface microstructure were discussed by collecting relevant data. Results: The results showed that the feed speed had the most significant effect on the surface roughness. The change of cutting depth has no direct effect on the surface roughness. The residual stress on the machined surface increases with the increase of cutting speed and feed rate. The microhardness decreases with the increase of cutting depth and increases with the increase of feed rate, while the microhardness at layer depth decreases first and then increases. The surface microstructure is little affected by the cutting speed and there is no obvious phase transformation and grain distortion. Reducing the feed speed is the most direct and effective way to reduce the workpiece surface roughness, increasing the cutting speed can not reduce the surface roughness obviously. The axial and tangential residual stresses on the workpiece surface are tensile stresses. In order to improve the performance of parts, corresponding measures should be taken to convert them into compressive stresses. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： High strength steel

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Research on high-voltage pulse ignition power supply technology based on μc_os_ii 19th

Research on high-voltage pulse ignition power supply technol...

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19th Chinese Intelligent Systems Conference, CISC 2023

作者： Zhao, Xu Yue, Changlu Xu, Xiuhua Hu, Cong Yang, Lei Beijing Institute of Precision Mechatronics and Controls Beijing100076 China Laboratory of Aerospace Servo Actuation and Transmission Beijing100076 China

ISBN: (纸本)9789819968817

The μC_OS_II is a complete, portable, curable, and customizable preemptive multitasking kernel, contains basic functions such as task scheduling, task management, time management, memory management, and communication and synchronization between tasks. lntroduce a high-voltage pulse ignition power supply design based on μC_OS_II, and made a more detailed description of the system structure and the realization of multitasking. The conclusion shows that the use of embedded real-time operating system can improve the reliability and maintainability of the system, the power supply has been successfully used in the pulse plasma space electric propulsion power system. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Multitasking

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