摘要
目前变量泵-变量马达系统的速度调节过程相当于变量泵控制定量马达或定量泵控制变量马达,这种方式存在系统溢流损失大、调节速度慢和没有发挥系统潜能等缺点。为克服这些不足,提出变量泵-变量马达自适应控制算法。变量泵对马达转速进行主动闭环控制,变量马达根据变量泵排量作随动控制而实现变量泵和变量马达排量的同时调节。采用单神经元自适应PID控制算法进行变量泵控制,采用预测自适应控制算法进行变量马达控制。给出了变量泵-变量马达自适应控制算法基本原理和框图,仿真和实验表明该算法可以提高系统响应速度、减少溢流损失。
Variable pump--variable motor（VPVM） adaptive control algorithm was presented to overcome the problems such as huge overflow losses,slow speed regulation, and poor full capacity utilization existing in the state--of--the--art for speed regulation in VPVM hydraulic system, where the motor speed was commonly regulated in phase either with variable pump controlling constant motor or constant pump controlling variable motor. The variable pump closed loop control was used to realize motor expected speed initiatively,while the variable motor was controlled by following control corre sponding to the pump displacement change rate,resulting in concurrent displacements control of both pump and motor. The variable pump was controlled by single neuron adaptive PID algorithm, while the variable motor was controlled by predictive adaptive control. The principles and diagrams of the al- gorithm were specified for VPVM system, and comparable simulations and experiments were carried out to verify the approach. The results of both tests show that the approach has the capacity for speeding up system response and reducing overflow losses for VPVM system.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第10期1173-1175,1179,共4页
China Mechanical Engineering
关键词
变量泵-变量马达
自适应控制
单神经元
预测控制
variable pump--variable motor
adaptive control
single neuron
predictive control
