基于预测控制的单向比例泵控非对称液压缸系统控制方法

为了解决单向比例泵控非对称液压缸系统的无超调位置控制问题,提出了采用带约束的三阶状态空间模型描述单向比例泵控非对称液压缸系统的方法,设计了一种适用于该模型的模型预测控制器来保证系统的无超调位置输出.仿真结果表明,运用模型预测方法能够避免换向阀切换引入的系统非线性,并有效解决泵控非对称液压缸系统的超调问题,实现多约束条件下的高精度位置控制.

Unidirectional Proportional Pump Controlled Asymmetric Cylinder Control Method Based on Predictive Control

Abstract： To resolve the problem of non overshooting position control of the unidirectional proportional pump controlled asymmetric cylinder system, this paper proposed a three order state space model with constraints to describe the system of unidirectional proportional pump controlled asymmetric cylinder. It also proposed a design of model predictive controller applicable to this model to guarantee its non overshooting output. The simulation results indicate that the proposed method has successfully resolved the overshooting problem without introducing non linear characteristics, thus realizing the aim of high precision position control under multiple constraints.