Adaptive Fuzzy PID Control of Direct Drive Pump-controlled Pressure Servo System
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摘要: 直驱泵控压力伺服系统属于典型的非线性时变系统,采用传统PID控制存在系统适应性差、压力波动幅度大以及跟踪控制精度低等问题。根据PID参数对压力伺服系统响应特性的影响规律,设计了根据系统误差和误差变化率在线自适应调整PID参数的自适应模糊PID控制器,分别采用传统PID控制和自适应模糊PID控制策略进行了直驱泵控压力伺服控制仿真与实验研究。结果表明,自适应模糊PID控制策略能大大改善PID控制的性能,使系统具有响应速度快、压力波动幅度降低、滞后与超调小的特点,提高了系统的动态品质和控制精度。
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关键词:
- 直驱泵控系统 /
- 压力伺服控制 /
- PID控制 /
- 自适应模糊PID控制
Abstract: Owing to the nonlinearity and time-variation in the direct drive pump-controlled pressure servo system, a conventional PID control method causes poor adaptability, great pressure fluctuation and poor tracking control performances. Based on the influence of the PID parameters on the response characteristic of the pressure servo system, the adaptive fuzzy PID controller that adjusts the PID parameters adaptively based on the error and change in error was designed. The simulations and experiments on the conventional PID control and the adaptive fuzzy PID control of the direct drive pump-controlled pressure servo system were carried out. The results show that the adaptive fuzzy PID controller can greatly improve the performance of the conventional PID control method and has fast response, less pressure fluctuation, small sluggishness and overshooting. The dynamic performance of the pressure servo system and its control accuracy are improved. -
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