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当前位置: 首页 > 文章 > 变排量非对称轴向柱塞泵控制特性分析 农业机械学报 2019 (3) 368-376
Position: Home > Articles > Analysis of Control Characteristics of Variable-displacement Asymmetric Axial Piston Pump Transactions of the Chinese Society for Agricultural Machinery 2019 (3) 368-376

变排量非对称轴向柱塞泵控制特性分析

作  者：
黄家海;贺伟;郝惠敏;权龙
单  位：
太原理工大学机械与运载工程学院
关键词：
轴向柱塞泵;变排量;泵控缸;斜盘受力
摘  要：
变排量非对称轴向柱塞泵(Variable-displacement asymmetric axial piston pump,VDAAPP)直接控制单活塞杆缸闭式系统具有结构紧凑、能效高的优势。在定排量三配流窗口轴向柱塞泵的基础上,提出基于斜盘摆角位置反馈的PD变排量控制策略。建立VDAAPP的数学模型,运用近似线性化及降阶的方法分析影响VDAAPP频响的因素,并对斜盘变量阻力矩进行研究。在AMESim中建立VDAAPP电液仿真模型,通过对斜盘受力特性的仿真分析,验证了阻力矩计算的正确性。搭建VDAAPP试验平台,对系统的动态性能进行测试。试验和仿真结果表明,当非对称轴向柱塞泵一个配流窗口吸油、两个配流窗口排油时,非对称轴向柱塞泵斜盘存在较大的单向阻力矩,此单向力矩会降低斜盘摆角减小过程中的动态响应;当采用PD控制、比例系数kp=3时,VDAAPP可实现零超调的变排量控制,且具有较高的响应速度,验证了所提控制方法的合理性。
译  名：
Analysis of Control Characteristics of Variable-displacement Asymmetric Axial Piston Pump
作  者：
HUANG Jiahai;HE Wei;HAO Huimin;QUAN Long;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology;Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan University of Technology;
单  位：
HUANG Jiahai%HE Wei%HAO Huimin%QUAN Long%College of Mechanical and Vehicle Engineering,Taiyuan University of Technology%Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan University of Technology
关键词：
axial piston pump;;variable-displacement;;pump-controlled cylinder;;swashplate force
摘  要：
Variable-displacement asymmetric axial piston pump( VDAAPP) directly control single piston rod hydraulic cylinder closed loop system has the advantages of compact structure and high energy efficiency. In order to develop VDAAPP,according to the fixed-displacement asymmetric axial piston pump with three flow distribution windows,a PD variable displacement control scheme based on position feedback of swashplate angle was proposed. The mathematical model of VDAAPP was established. The factors affecting the frequency response of VDAAPP were analyzed by using approximate linearization and order reduction methods. The resistance torque of swashplate was also studied. The electro-hydraulic simulation model of VDAAPP was established in AMESim. The correctness of the resistance moment formula was verified by simulation analysis of force characteristics of swashplate. The experimental platform of VDAAPP was built to test the dynamic performance of the system. The results of experiment and simulation showed that when VDAAPP sucked oil by one flow distribution window and discharged oil by two flow distribution windows,the VDAAPP swashplate had a large one-way resistance moment,which would reduce the dynamic response of the swashplate in the process of reducing the swashplate angle;when the PD control was used and the proportional gain kpwas 3,VDAAPP can achieve zero overshoot variable displacement control and had high response speed,which demonstrated the rationality of the proposed control scheme.

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