并联驱动电液系统振动控制策略研究

沈 刚1,芮光超2,张明飞3,李 戈1,汤 裕1

振动与冲击 ›› 2019, Vol. 38 ›› Issue (12) : 81-89.

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PDF(3035 KB)
振动与冲击 ›› 2019, Vol. 38 ›› Issue (12) : 81-89.
论文

并联驱动电液系统振动控制策略研究

  • 沈  刚1,芮光超2,张明飞3,李  戈1,汤  裕1
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A study on vibration control strategy for a parallel driven electro-hydraulic system

  • SHEN Gang1,RUI Guangchao2,ZHANG Mingfei1,LI Ge1,TANG Yu1
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摘要

针对并联驱动电液系统的内力耦合问题,建立了振动系统的动力学模型,分析了干扰耦合的产生原因。利用自由度分解实现了多个激振器的独立控制,通过内力反馈解耦控制消除系统在运行过程中产生的耦合内力。在此基础上,利用三状态控制器对系统进行加速度闭环控制,改善系统的动态特性;通过引入前馈逆模型控制策略拓展系统频宽,利用并联驱动电液试验台对振动控制策略进行实验验证,试验结果证明提出的控制策略能够提高振动控制精度。
 

Abstract

In order to suppress internal force coupling of a parallel driven electro-hydraulic system, a dynamic model of the vibration system was established and the causes of coupling disturbance were analyzed.Then, the degree-of-freedom decomposition was applied to realize independent control of eight exciters, an internal force decoupling controller was applied to eliminate the coupling internal force in the process of operation.On this basis, a three-variable controller was applied to realize acceleration closed-loop control of the electro-hydraulic system and improve dynamic characteristics of the vibration system, and a feedforward inverse controller was applied to expand the system bandwidth.Performances of the proposed control strategy were validated through experiments using a parallel driven electro-hydraulic testing rig, and the experimental results demonstrate that the proposed control strategy can improve vibration accuracy.

关键词

并联驱动 / 电液系统 / 内力解耦 / 前馈补偿

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沈 刚1,芮光超2,张明飞3,李 戈1,汤 裕1. 并联驱动电液系统振动控制策略研究[J]. 振动与冲击, 2019, 38(12): 81-89
SHEN Gang1,RUI Guangchao2,ZHANG Mingfei1,LI Ge1,TANG Yu1. A study on vibration control strategy for a parallel driven electro-hydraulic system[J]. Journal of Vibration and Shock, 2019, 38(12): 81-89

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