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Refined modeling and experimental verification of a torque motor for an electro-hydraulic servo valve

Chinese Journal of Aeronautics 2023年第6期36卷 302-317页

作者： Zhichuang CHEN Shenghong GE Yulei JIANG Wenhao CHENG Yuchuan ZHU National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft SystemsNanjing 210061China AVIC Nanjing Servo Control System Co. LtdNanjing 210032China

The Permanent Magnet Torque Motor(PMTM)is the key electro-mechanical conversion device in an Electro-Hydraulic Servo Valve(EHSV).In this work,a refined model of a PMTM is developed,considering the non-working air-gaps between the upper or lower yoke and the armature,the fringing effect at the limiting holes,and the nonlinear permeability of soft magnetic *** on the refined model,the influences of various factors on the calculation accuracy of the magnetic flux at the pole surfaces of the armature and the output torque are *** verifying the validity of the refined model,a Finite Element Analysis(FEA)of the PMTM is conducted,and a test platform is *** with existing models,the refined model can better reveal the intrinsic mechanism of the PMTM,and its calculations are more consistent with the FEA *** experimental results of the armature deflection displacement show that the refined model can accurately describe the output characteristics of the PMTM.

关键词： Calculation accuracy Electro-hydraulic servo valve Experimental verification Finite element analysis Refined model Torque motor

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Data-Driven Based Model-Free MPC for DTP-PMSM with Optimized Space Vector 27

Data-Driven Based Model-Free MPC for DTP-PMSM with Optimized...

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27th International Conference on Electrical Machines and systems, ICEMS 2024

作者： Zhang, Xiaojun Yan, Liang Yang, Jiaqiang Sun, Weiqiang Jia, Yuqi Situ, Anqi College of Electrical Engineering Zhejiang University Hangzhou China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (纸本)9784886864406

Finite control set model predictive control (FCS-MPC) has been extensively investigated owing to its numerous disadvantage, such as fast response and easy implementation. However, FCS-MPC is highly sensitive to system modeling and parameters, and its performance deteriorate when the system has unmodeled dynamics and parameter mismatches. To address this issue, a data-driven based model-free predictive current control (MFPCC) for dual-three phase permanent magnet synchronous machine (DTP-PMSM) is proposed, which use only the input and output data of the system instead of the accurate mathematical models and parameters. In addition, the virtual voltage vectors (V3s) is utilized to reduce the harmonic current. More specifically, the space vector is optimized for reducing the torque ripple. Simulation investigations on DTP-PMSM platform validate the superiority of the proposed strategy. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Vectors

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An Improved Speed Estimation Method for PMSM Using Speed Correction 27

An Improved Speed Estimation Method for PMSM Using Speed Cor...

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27th International Conference on Electrical Machines and systems, ICEMS 2024

作者： Sun, Weiqiang Yang, Zhebin Zhang, Xiaojun Situ, Anqi Jia, Yuqi Yang, Jiaqiang School of Electrical Engineering Zhejiang University Hangzhou China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (纸本)9784886864406

Sensorless control technology has been received significant attention in recent years due to its advantages of reducing system size and cost while enhancing reliability. As a result, it has become a key focus in the field of motor control research. However, the speed regulation and load capacity of sensorless methods diminish during low-speed operation, thereby negatively impacting the performance across broad range. To address this issue, an improved speed sensorless estimation method for permanent magnet synchronous machines (PMSM) combined with speed correction is proposed, which use the principle of corrective parameter selection and current estimation error to correct speed estimation. The outcomes of the experiments indicate that proposed method still run stably under full load at 10% of the rated speed during low-speed operation, verifying the feasibility and effectiveness of the method. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Permanent magnets

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Trade-Off of the Clearance at the Control Plunger Section of a Solenoid Valve 6th

Trade-Off of the Clearance at the Control Plunger Section of...

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6th China Aeronautical science and technology Conference, CASTC 2023

作者： Li, Changming Cui, Pengbo Xu, Xiangrong AVIC Jincheng Nanjing Engineering Institute of Aircraft System Nanjing211106 China Aviation Key Laboratory of Science and Technology On Aero Electromechanical System Integration Nanjing211106 China

ISBN: (纸本)9789819988662

Aiming at block failure of a type of solenoid valve, the clearance at the control plunger section was trade-off, and the purpose is to solve the block while not causing over leakage of the whole valve. According to the analysis of the internal leakage channel of the solenoid valve, it is known that there is no leakage in the clearance at the control plunger section under the power-off condition, and the leakage through the clearance is far less than the allowable value when the power is turned on, that is, the clearance can be increased to eliminate the jam. Within the allowable range of leakage, calculated according to the annular gap flow formula, when the eccentricity of the control plunger in the sleeve takes the extreme values 0 and 1, the unilateral maximum allowable values of the clearance are 6.3 μm and 4.6 μm respectively. According to the estimation of the leakage test results, the eccentricity of the control plunger in the sleeve is 0.42, and the unilateral maximum allowable value of the clearance is 5.8 μm. By increasing the clearance of the control plunger section, the block failure of the solenoid valve is eliminated, and no over-leakage occurs. © 2024, Chinese Society of Aeronautics and Astronautics.

关键词： Blockage Clearance Leakage Solenoid valve Trade-off

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INFLUENCE OF CONTROL COMPONENTS ON THE OPEN-LOOP CHARACTERISTICS OF AIRBORNE EVAPORATIVE CYCLE system

INFLUENCE OF CONTROL COMPONENTS ON THE OPEN-LOOP CHARACTERIS...

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2024 CSAA/IET International Conference on Aircraft Utility systems, AUS 2024

作者： Wang, Ruiqi Zhan, Hongbo Ouyang, Jingpeng Gao, Zanjun Yang, Hua Hu, Wenchao Nanjing Engineering Institute of Aircraft Systems AVIC Jincheng Nanjing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

In this paper, an airborne evaporative cycle system is built, and R1234ze is used as the working medium. To explore the open-loop behavior of an airborne evaporative cycle system, we examined how adjusting the compressor speed and electronic expansion valve opening affects the compressor inlet superheat, heat source outlet temperature, and refrigeration capacity. The test results indicate that, in the specified testing conditions, the impact of compressor speed and electronic expansion valve opening on system performance is evident. As compressor speed increases, there is a significant rise in compressor inlet superheat, a notable decrease in heat source outlet temperature, and a substantial increase in refrigeration capacity. Conversely, an increase in electronic expansion valve opening leads to a significant reduction in compressor inlet superheat. © The Institution of Engineering & technology 2024.

关键词： Compressors

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DESIGN OF THE MAGNETIC CIRCUIT COMPENSATION TYPE OF LARGE ANGLE MEASUREMENT OF RVDT

DESIGN OF THE MAGNETIC CIRCUIT COMPENSATION TYPE OF LARGE AN...

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2024 CSAA/IET International Conference on Aircraft Utility systems, AUS 2024

作者： Wang, Hongchao Jiang, Hongyan Mao, Shijie Wang, Yin Han, Chao Zhao, Yuqing Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Engineering Institute of Aircraft Systems AVIC Jincheng Jiangsu Nanjing211106 China

In order to meet the need of large angle measurement of actuating system, the miniaturization and dexterity is taken as the design idea. By redesigning the structure of rotor core and stator coil, the measuring angle is expanded without increasing the number of components, the volume and weight of RVDT. In addition, in order to improve the linearity of induced voltage of RVDT, the method of magnetic circuit compensation is adopted. When making the rotor core, tilting its side, the total magnetic flux of RVDT is stable when the rotor core rotates at any angle. By using theoretical analysis, simulation experiment and prototype test, the design of magnetic circuit compensation type of large angle measurement of RVDT is verified. © The Institution of Engineering & technology 2024.

关键词： Angle measurement

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Research on the cabin pressure control system based on the gray wolf fuzzy PID algorithm 2

Research on the cabin pressure control system based on the g...

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2023 2nd International Conference on Aerospace and Control Engineering, ICoACE 2023

作者： Wang, Shun Meng, Fanxing Yang, Yonghui Yang, Changbao Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing211106 China Nanjing Engineering Institute of Aircraft Systems Nanjing211106 China

The cabin pressure control system is typically nonaffine-nonlinear time-varying system. In this paper, the fuzzy PID control method optimized by gray wolf algorithm is proposed to solve the problems of large overshoot and long adjustment times in traditional control methods. Simulation results show that the fuzzy PID control method optimized by gray wolf algorithm proposed in this paper improves the dynamic characteristics of the system, reduces cabin pressure error and adjustment time, stabilizes the control process, and improves the comfortableness of passengers. © Published under licence by IOP Publishing Ltd.

关键词： Three term control systems

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RESEARCH ON AUTO-TUNING OF CONTROL PARAMETERS FOR aviation ELECTROHYDROSTATIC ACTUATOR BASED ON INTELLIGENT ALGORITHM OPTIMIZATION

RESEARCH ON AUTO-TUNING OF CONTROL PARAMETERS FOR AVIATION E...

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2024 CSAA/IET International Conference on Aircraft Utility systems, AUS 2024

作者： Chen, Yuxi Chen, Lijun Yao, Yeming Wang, Xiaoping Chang, Cheng Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China Nanjing Engineering Institute of Aircraft Systems Jincheng Corporation AVIC Nanjing China

This paper takes the aviation Electro-hydrostatic Actuator (EHA) as the research object, analyses its working principle and structural characteristics, establishes mathematical models for the drive motor, pump and cylinder, and builds a simulation model based on MATLAB/Simulink. Addressing the issues of strong nonlinearity, cumbersome manual tuning of PI parameters under strong disturbances, and poor control effects in the EHA systems, this paper proposes an auto-tuning method for PI control parameters based on improved Bayesian optimization. A comparative analysis is conducted with traditional manual tuning methods and RF methods. According to simulation comparison results, the proposed method outperforms traditional tuning methods in terms of robustness and rapidity. © The Institution of Engineering & technology 2024.

关键词： MATLAB

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STUDY ON THE RELATIONSHIP BETWEEN THE FRICTION PAIRS WEAR AND THE PLUNGER FRACTURE

STUDY ON THE RELATIONSHIP BETWEEN THE FRICTION PAIRS WEAR AN...

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2024 CSAA/IET International Conference on Aircraft Utility systems, AUS 2024

作者： Zou, Pengjian Zhang, Haoran Gu, Manning Xia, Tianxiang Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing211106 China Nanjing Engineering Institute of Aircraft System Jincheng Corporation AVIC Nanjing211106 China

The plunger pump is one of the most complicated hydraulic components, the fault reason is hidden, the traditional analysis method such as theoretical formula is difficult to study its fault principle and correlation. In some cases of plunger pump failure, the fracture of the plunger is usually accompanied by serious wear of plunger and sliding shoe. In order to study the correlation between kinematic pairs wear and plunger fracture, a flexible-solid coupling dynamic digital prototype of plunger pump is built, which takes into account the action of hydraulic pressure and rotating load in a rotating cycle. The friction force of the friction pair is considered by modifying the contact method of the friction surface of kinematic pair. The simulation results show that the plunger pair wear leads to the increase of supporting force of sliding shoes, the wear of plunger and sliding shoe leads to the sharp increase of stress of plunger neck, the wear of kinematic pair is related to the plunger fracture. © The Institution of Engineering & technology 2024.

关键词： Friction

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Exploration of the design method of fuel pump parts structure optimization

Exploration of the design method of fuel pump parts structur...

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2024 CSAA/IET International Conference on Aircraft Utility systems, AUS 2024

作者： Zongtai, Cui Xun, Shen Xian, GuJing Yang, Yang Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing211106 China Nanjing Engineering Institute of Aircraft Systems AVIC Nanjing211106 China

With the continuous improvement of performance requirements for aircraft combat, transportation, and power, the weight requirements for aircraft are becoming increasingly stringent, and the demand for lightweight design of aircraft accessories is becoming increasingly urgent. The aviation fuel pump is the core component of the aircraft fuel system. It is of great significance to reduce the mass of redundant structures and improve the power to weight ratio of pumps while ensuring structural strength. Traditional fuel pump design mainly relies on the designer's experience in selecting structural forms and determining parameters. With the development of technology, especially finite element technology, important methods and means have been provided for strength analysis in the design process of fuel pump structures. However, in terms of design methods, pump design has not yet broken through the limitations of traditional empirical design, such as the determination of structural topology, selection of shape, and optimization of structural size parameters. This article explores the commonly used methods of structural optimization design, with a focus on introducing topology optimization theory and its applications. It takes the structural optimization design of a certain type of fuel pump component as the research object, in order to provide some theoretical reference for future fuel pump structural design optimization. © The Institution of Engineering & technology 2024.

关键词： Fuel pump Shape optimization Structural design Topology optimization Abstract

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