泵阀并联系统复合式控制策略研究

为综合泵控高效节能和阀控高精度快响应的优势,研究一种泵阀并联位置伺服系统. 建立泵阀并联系统数学模型,并分析系统特性及油源效率;针对系统定位控制,提出一种泵PID控制、阀分段作用PID控制的分段双PID复合控制策略;针对系统动态跟踪控制,提出泵控回路采取PID控制并固定其输出,阀控回路始终采取迭代学习控制的复合控制策略. 仿真结果表明,在定位控制方面,相比纯泵控系统,分段双PID控制策略能够明显提高系统响应速度;在动态跟踪控制方面,固定PID输出和迭代学习控制相结合的复合控制策略,能使系统兼具高效节能和高精度快响应的优势. 

Hybrid Control Strategy Research Based on Pump and Valve Cooperate System in Parallel

In order to combine efficient of pump control with accuracy and fast response of valve control, this paper investigates the pump and valve cooperate system in parallel. First, the system mathematic model was built, the system performance and oil source efficiency were analyzed. Then, a hybrid control strategythat includes pump PID control and valve segmented PID control was proposed for system localization control, a hybrid control strategy that includes pump PID control and fix the output, valve apply iterative learning control was proposed for system dynamic tracking control. Simulation shows that, compare to pump control system, segmentation double PID control strategy can improve parallel system response speed for localization control; fixed PID control and iterative learning control make parallel system both efficiently and accuracy with fast response.