静压驱动系统PID参数整定及其模糊自适应控制

文章在分析静压驱动系统组成及数学模型的基础上。分别采用临界比例带法和NCD优化法对PID参数进行整定，并应用模糊控制理论，设计了一种模糊自适应PID控制器。该控制器根据马达转速偏差和偏差的变化率，利用模糊逻辑实现PID参数的在线调整，使系统具有较好的自适应能力和较强的抗干扰性。并在Matlab／Simulink环境下对其进行了动态仿真。仿真结果表明，NCD优化法的整定效果较好，模糊自适应PID控制器的性能优于常规PID控制器。

A Study on the Tuning of PID Parameters and Fuzzy-adaptive Control of Hydrostatic Driving System

On basis of analyzing the constitution and mathematical model of hydrostatic driving system, this article makes an attempt to apply the critical proportioning method and the Optimization Method of NCD respec- tively to the tuning of PID parameters. In addition, in combination with the fuzzy control theory and the tradition- al PID control, it attempts to design a kind of fuzzy-adaptive-PID controller, which applies fuzzy logic to the on- line self-adjustment of PID parameters, combined with the motor speed error and its derivative, so as to ensure its better self-adaptive ability and disturbance resistance performance. Lastly, the dynamic simulation is made in the Matlab/Simulink environment, the results of which indicate that the Optimization Method of NCD produces better tuning effects and the fuzzy-adaptive controllers are superior to the conventional ones in performance.