中国机械工程 ›› 2016, Vol. 27 ›› Issue (06): 805-809,832.

• 机械基础工程 • 上一篇    下一篇

变转速液压动力源的负载前馈-反馈复合补偿控制

李昭;谷立臣;马玉   

  1. 西安建筑科技大学,西安,710055
  • 出版日期:2016-03-25 发布日期:2016-03-24
  • 基金资助:
    国家自然科学基金资助项目(51275375);陕西省教育厅专项研究项目(15JK1412)

Load Feedforward and Feedback Compounded Compensation Controlfor Variable Speed Hydraulic Power Supply

Li Zhao;Gu Lichen;Ma Yu   

  1. Xi'an University of Architecture&Technology,Xi'an,710055
  • Online:2016-03-25 Published:2016-03-24
  • Supported by:

摘要:

研究了前馈控制和反馈控制的原理及优缺点,提出采用负载前馈-反馈复合补偿控制策略实现液压动力源在典型工况下的恒流量控制。以变转速机电液系统实验平台为基础,建立变转速液压动力源的Simulink仿真模型,分别在简单PID反馈控制和复合补偿控制策略下进行仿真和实验,结果证明了该复合补偿控制策略在液压动力源恒流量控制中的可行性和有效性,其抗负载扰动性能明显优于简单PID反馈控制。

关键词: 反馈控制, 负载前馈, 液压动力源, 抗负载扰动性

Abstract:

The principles and characteristics of feedforward control and feedback control were studied,a method called the load feedforward and feedback compounded compensation control strategy was proposed herein to realize the constant flow control of hydraulic power supply under typical operating conditions. Based on the experimental platform of mechanical-electrical-hydraulic system, a Simulink model of variable speed hydraulic power supply was established. The simulations and experiments were carried out respectively under a simple PID feedback control and a compounded compensation control strategy. The results verify the compounded compensation control strategy is efficient and feasible in constant flow control of hydraulic power supply,and the resistance to load disturbance of the compounded  compensation control strategy is superior to the simple PID control .

Key words: feedback control, load feedforward, hydraulic power supply, resistance to load disturbance

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