基于S7-300的比例阀控液压缸的PID静态补偿控制  

PID Static Compensation Control Strategy of Hydraulic Cylinder Controlled by Proportional Valve Based on S7-300

作　　者：余祖耀[1] 陈壮[1] 

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430074

出　　处：《机械与电子》2016年第4期43-46,50,共5页Machinery & Electronics

摘　　要：分别建立对称阀控非对称液压缸在有杆腔进油和活塞腔进油时的数学模型,使用MATLAB/Simulink分析液压系统在这两种进油情况下的动静态特性,结果表明,液压系统在两种进油情况下系统超调量、调节时间、振荡次数等几个方面存在较大差异。为补偿系统这种非对称性,以S7-300PLC作为控制器的基础上提出了PID静态补偿控制策略。在疲劳加载试验台上对这一控制策略进行试验验证,试验结果表明,采用PID静态补偿策略很大程度上提高了系统的响应速度及精度。The mathematic model of the asymmetrical cylinder controlled by symmetric valve is estab- lished respectively in the both cases of oil inlet from the rod chamber and oil inlet from the piston chamber. MATLAB/Simulink is introduced to analyze the static and dynamic characteristics of the hydraulic system in both conditions,the result shows that there exists great difference on system overshoot, settling time, os- cillation frequency and other aspects of the hydraulic system under this two conditions. To compensate system ~s asymmetry characteristics, the PID static compensator control strategy is proposed on the basis of $7- 300 PLC as the controller. This control strategy has been tested on the fatigue loading test rig, the test results show that using the static PID compensation strategy can greatly improve the response speed and accuracy of the system.

关 键 词：非对称液压缸 动静态特性 S7—300 PLC PID静态补偿控制 试验验证 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]