摘要
为了更为有效的诊断电液伺服系统的故障,针对复杂的非线性的与多参数的阀控不对称缸电液伺服系统,提出了具有较大自由度的PI观测器的设计方法。首先建立了阀控不对称缸电液伺服系统系统的线性化模型,运用线性矩阵不等式设计了PI观测器来估计系统输出,然后将估计结果和未知输入同时加入到控制率中,不仅使系统能够跟踪给定的参考模型,而且也能得到外界故障估计。最后通过MATLAB仿真将实际输出值与估计值进行比较,证明了所设计的PI观测器和控制方法的对故障诊断的有效性。
In order to effectively detect faults of electro-hydraulic valve-controlled single rod cylinder servo sys- tem with complex, nonlinear and multi-parameter, a design method for PI observer with high freedom is proposed. Firstly, a linear system model is built. The PI observer is designed to estimate the system output via linear matrix ine- quality. The estimation results and unknown input are joined in the control. The system can track the reference mod- el. And the displacement estimation is obtained. Finally the example simulation proves that the PI observer and the control method are effective by comparing the actual values and estimated values.
出处
《计算机仿真》
CSCD
北大核心
2016年第3期446-449,共4页
Computer Simulation
基金
山西省自然科学基金资助项目(2015011065)
关键词
阀控不对称缸电液伺服系统
观测器
线性矩阵不等式
Electro-hydraulic valve-controlled single rod cylinder servo system
Observers
Linear matrix inequality
