嵌入并联压电执行机构的空间柔性结构振动抑制

doi:10.3901/JME.2025.23.170

摘要/Abstract

摘要： 针对空间柔性结构的振动抑制问题，设计嵌入并联压电执行机构的柔性结构振动抑制系统。提出一种二维大力矩输出的并联压电执行机构，进行执行机构的参数设计与性能分析，研制执行机构的原理样机并完成执行机构的作动性能测试，测试结果显示提出的压电执行机构力矩输出能力达100 N·m。考虑到桁架结构可以等效为柔性梁，建立嵌入压电执行机构的柔性梁振动抑制系统的动力学模型，分析执行机构的刚度、阻尼和质量等动力学参量对振动抑制系统响应的影响规律，在此基础上分析速度反馈控制策略下柔性梁的振动抑制效果。搭建嵌入并联压电执行机构的柔性梁振动控制实验系统，并开展振动抑制实验，实验结果显示提出的振动抑制系统具有良好的振动控制效果，能在较短时间内将柔性梁的振动幅值抑制到较小范围内。研究结果将为空间柔性结构振动抑制执行机构设计与控制提供理论基础。

关键词: 空间柔性结构, 振动控制, 并联机构, 压电执行机构

Abstract: A flexible structure vibration suppression system embedded with parallel piezoelectric actuators is proposed to solve the problem of space flexible structures vibration suppression. A two-dimensional parallel piezoelectric actuator with high torque output is proposed, the parameter design and performance analysis of the actuator are carried out, the principle prototype of the actuator is developed and its actuation performance test is completed. The test results show the torque output capacity of the proposed actuator is over 100 N·m. Considering the truss structure can be equivalent to a flexible beam, a dynamic model of the flexible beam embedded with the piezoelectric actuator is established, and the influence of the dynamic parameters such as stiffness, damping and mass of the actuator on the response of the vibration suppression system is analyzed, and the vibration suppression effect under the velocity feedback control is clarified. The experimental results show that the proposed vibration suppression system has a good vibration control effect, and can suppress the vibration amplitude of the flexible beam to a small range in a short time. The research results will provide a theoretical basis for the space flexible structures vibration suppression actuators design and control.

Key words: space flexible structure, vibration control, parallel mechanisms, piezoelectric actuator

中图分类号:

V448

程明, 付俊, 朱东方, 孙俊. 嵌入并联压电执行机构的空间柔性结构振动抑制[J]. 机械工程学报, 2025, 61(23): 170-181.

CHENG Ming, FU Jun, ZHU Dongfang, SUN Jun. Vibration Suppression of Space Flexible Structures Embedded with Parallel Piezoelectric Actuators[J]. Journal of Mechanical Engineering, 2025, 61(23): 170-181.

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