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17th Chinese Intelligent Systems Conference, CISC 2021

作者： Cui, Peijuan Zhang, Qianfan Hou, Zhanlin Fu, Jie He, Luman Song, Xiancheng Harbin Institute of Technology Harbin China Laboratory of Aerospace Servo Actuation and Transmission Beijing China Beijing Institute of Precision Mechatronics and Controls Beijing China

ISBN: (纸本)9789811663192

Permanent magnet electromagnetic brake(PMEMB) is the optimal solution in the redundancy differential actuation system of aircraft. In this paper, the performance degradation factors of PMEMB which have strong correlation with time factors are analyzed systematically. It is considered that the electrochemical corrosion of iron-based friction pair is the main weak link of performance degradation of the PMEMB. Based on the analysis of the physical properties such as wear resistance and hardness gradient of the surface strengthening layer of the friction pair, the simulated accelerated storage test scheme is formulated with temperature and humidity as acceleration factors, the performance degradation laws of the PMEMB are discussed, and the correlation between the storage environment conditions and the distribution of braking performance degradation is studied, and the performance recoverability is verified. Different corrosion inhibition measures, such as cathodic protection, volatile chemical molecular protection and three-proofing lacquer coating, are compared and studied, and the optimal inhibition scheme is obtained. Finally, the performance degradation and characterization technology of PMEMB for further study are proposed. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Permanent magnets

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Research On Simulation Mechanism And Method Of The Bolt Preload

Research On Simulation Mechanism And Method Of The Bolt Prel...

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2022 CSAA/IET International Conference on Aircraft Utility Systems, AUS 2022

作者： Huang, Jing Liu, Yadong Zhou, Weiwei Mei, Hong Hu, Baobin First Beijing Institute of Precision Mechatronics and Controls Beijing China Second Laboratory of Aerospace Servo Actuation and Transmission 1 Nandahongmen Road Beijing China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

Bolt pre-load plays an important role in strengthening the stiffness and tightness of bolted joints and preventing looseness and slippage. It is widely used in the aircraft manufacturing process. To find an optimal bolt pre-load realization method, the finite element model of bolt-connection structure is established with simulation software. The bolt pre-load is simulated by the preload section method and the temperature load method respectively, and the difference between them and their applicability are discussed. The results show that the two methods can reflect the stress state of the connection structure. However, compared with the pre-load section method, the temperature load method which is based on the trial-calculation and iteration, has a certain deviation between the bolt stress and the actual situation. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Bolts

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Intelligent Power Management System for Vehicle

Intelligent Power Management System for Vehicle

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Power Science and Technology (ICPST), IEEE International Conference on

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

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.

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Oil-separation properties of aviation grease under thermal aging 64

Oil-separation properties of aviation grease under thermal a...

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64th International Conference on Vibroengineering

作者： Wang, Chaoyi Chen, Chuanhai Liu, Zhifeng Liu, Changxin Guo, Jinyan Cui, Peijuan Key Laboratory of CNC Equipment Reliability Ministry of Education Jilin University Changchun China School of Mechanical and Aerospace Engineering Jilin University Jilin Changchun China Beijing Institute of Precision Mechatronics and Controls Beijing China

During work or long-term storage, grease is susceptible to thermal oxygen or mechanical aging, which affects the performance of grease or even leads to the destruction of the structural surface of grease lubricated products. As the main mechanism of grease lubrication, grease partitioning can explore the aging law of grease and effectively identify whether the grease fails. In this paper, 7014 aerospace grease was selected as the research object and accelerated test was conducted by high temperature thermal oxygen. The combination of grease separation degree and mass change rate was selected for comprehensive characterization of grease separation performance. The results show that the grease partitioning degree has a significant decreasing trend;the quality change has also decreased and the degradation trajectory is similar to the partitioning degree;it is inferred that the main reason for the decrease of grease partitioning performance may be the loss of base oil and the change of thickener fiber structure. © 2023 JVE International. All rights reserved.

关键词： Thermal aging

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

Multiple Resonant Load Characteristics and Control Strategy ...

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International Conference on Fluid Power and mechatronics (FPM)

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

ISBN: (数字)9798350304947

ISBN: (纸本)9798350304954

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.

关键词： Actuators mechatronics Resonant frequency Aerodynamics Resonance Vehicle dynamics Particle swarm optimization

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Design and Implementation of Integrated Distribution Auxiliary Power Supply Based on Flyback Converter

Design and Implementation of Integrated Distribution Auxilia...

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International Symposium on Computer Science and Intelligent controls (ISCSIC)

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

In order to solve the problem of high voltage stress of the switching caused by the High DC input single-ended flyback converter and serious mutual influence between the multiple outputs of the single-ended flyback converter due to strong coupling, a dual-switch flyback converter and a full bridge are designed. The converter two-stage topology structure, in order to avoid the influence of the zero point of the right half plane of the continuous current mode, a type II feedback compensation network is used, the open-loop transfer function of the dual-switch flyback converter before and after compensation is calculated, and by applying Matlab provided Bode diagram analyzes its stability. After that, the closed-loop feedback system of the dual-switch flyback converter is built in the PSIM simulation environment to simulate the rationality of the design parameters. Finally, the stability of the closed-loop feedback system and the independence of the multi-channel power supply output are verified by experiments.

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Design Of Multi-Level Fault-Tolerant Interactive Control Drive System For Aviation Electric Mechanism

Design Of Multi-Level Fault-Tolerant Interactive Control Dri...

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2022 CSAA/IET International Conference on Aircraft Utility Systems, AUS 2022

作者： Mou, Pengtao Ji, Yuan Bao, Jingjing Xu, Zhishu Yue, Zongshuai Beijing Institute of Precision Mechatronics and Controls Beijing China Certification & Testing Co. Ltd. Laboratory of Aerospace Servo Actuation and Transmission Beijing China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

In this paper, we designed a multi-level fault-tolerant interactive control drive system for aviation electric mechanism. It has a multi-level fault-tolerant mechanism and can automatically switch the working circuit step by step under different failure modes, which greatly improves the interaction utilization rate of each system module and guarantees the electric mechanism. The system works long-term and reliably, The system can meeting the requirements of the aviation system's long-endurance, high-reliability, and long-life tasks. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Fault tolerance

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HTEC foot:A novel foot structure for humanoid robots combining static stability and dynamic adaptability

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Defence Technology(防务技术) 2025年第2期44卷 30-51页

作者： Jintao Zhang Xuechao Chen Zhangguo Yu Lianqiang Han Zhifa Gao Qingrui Zhao Gao Huang Ke Li Qiang Huang School of Mechatronical Engineering Beijing Institute of TechnologyNo.5South StreetZhongguancunHaidian DistrictBeijing100081China Key Laboratory of Biomimetic Robots and Systems Ministry of EducationNo.5South StreetZhongguancunHaidian DistrictBeijing100081China School of Information Science and Technology Beijing University of TechnologyNo.100PingleyuanChaoyang DistrictBeijing100124China Innovation Center for Control Actuators Beijing Institute of Precision Mechatronics and ControlsDonggaodiFengtai DistrictBeijing100076China

Passive bionic feet,known for their human-like compliance,have garnered attention for their potential to achieve notable environmental *** this paper,a method was proposed to unifying passive bionic feet static supporting stability and dynamic terrain adaptability through the utilization of the Rigid-Elastic Hybrid(REH)dynamics ***,a bionic foot model,named the Hinge Tension Elastic Complex(HTEC)model,was developed by extracting key features from human ***,the kinematics and REH dynamics of the HTEC model were *** on the foot dynamics,a nonlinear optimization method for stiffness matching(NOSM)was ***,the HTEC-based foot was constructed and applied onto BHR-B2 humanoid *** foot static stability is *** enhanced adaptability is observed as the robot traverses square steel,lawn,and cobblestone *** proposed design method and structure,the mobility of the humanoid robot is improved.

关键词： Humanoid robot Bionic structure Passive foot structure Rigid-elastic hybrid dynamics model Optimal stiffness matching

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Research on control of solid rocket electric actuator based on LQR

Research on control of solid rocket electric actuator based ...

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2021 IEEE International Conference on Artificial Intelligence and Computer Applications, ICAICA 2021

作者： Li, Qi Zhang, Meng Chang, Dongyan Zhou, Weiwei Li, Huaibing Li, Zhe Shao, Chong Heng, Chunying Beijing Institute of Precision Mechatronics and Controls Laboratory of Aerospace Servo Actuation and Transmission Beijing China

ISBN: (纸本)9781665418676

Considering the dynamic model of the air rudder of the solid rocket, the state space expression of the electric actuator is derived. Considering the practical demand of low cost and reuse of commercial rocket, the linear quadratic regulator (LQR) scheme of angle and current integrated control is designed according to the optimal control theory. Based on the simulation and dSPACE hardware in the loop testing, the influence of parameters in LQR controller on the dynamic and static performance of the system is studied. The results show that LQR control can achieve more rapid and accurate control of the electric actuator than the traditional PID control, and avoid excessive energy consumption to meet the needs of the rocket servo control. © 2021 IEEE.

关键词： Three term control systems

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A Novel Time-varying Path Planning Method for Dynamic Obstacles 6

A Novel Time-varying Path Planning Method for Dynamic Obstac...

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6th International Conference on Robotics and Automation Engineering, ICRAE 2021

作者： Jia, Longfei Yu, Zhiyuan Zheng, Jigui Guo, Yaxing Chen, Zhong Huang, Yuping Beijing Institute of Precision Mechatronics and Controls Laboratory of Aerospace Servo Actuation and Transmission Beijing China

ISBN: (纸本)9781665406970

In the research of snake-like manipulator and mobile robot obstacle avoidance, most researchers only plan the path for static obstacles. However, there are many dynamic obstacles in the real world. Therefore, this paper proposes a general method that can plan the real-time changing path for the dynamic obstacle avoidance of moving objects such as quasi-continuous manipulators. The size, position, and other information of the obstacle are extracted by point cloud or image processing. The bounding box method is selected according to the shape of the obstacle so that the obstacle is equivalent to some basic shapes. For the dynamically updated bounding box, the corresponding continuous time-varying path/function is formulated, so that real-time obstacle avoidance can be realized. By analyzing the constraints that the continuous function that characterizes the time-varying path needs to be satisfied, the ultimate continuous function is selected by formulating the optimization objective. For various types of dynamic obstacles, the corresponding time-varying path can be planned, and the quasi-continuous manipulator moving along this path can realize real-time obstacle avoidance. Simulation results demonstrate the effectiveness of the proposed method. © 2021 IEEE.

关键词： Manipulators

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