含双重补偿的液压缸位置同步控制

非对称液压缸同步控制系统在大型、重型工业设备中应用广泛,其同步性能和响应速度直接影响设备的稳定运行。为了进一步优化对称阀控非对称液压缸同步系统,对阀控非对称液压缸进行建模分析。基于非对称液压缸特性及负载变化范围大的特点,提出了模糊补偿控制方法来提高液压缸的响应速度;针对液压缸的同步问题,设计了交叉耦合的前馈补偿控制方式来缩小同步误差。利用AMESim搭建液压回路系统模型作为控制对象,并联合Simulink搭建控制系统进行仿真。仿真结果表明:相比于改进前,在负载不断变化且具有偏载的情况下,含双重补偿的同步控制可以明显减小液压同步系统的跟踪误差与同步误差。

Synchronous Control of Hydraulic Cylinder Position with Double Compensation

Asymmetric cylinder synchronous control system is widely used in large and heavy industrial equipment applications, the synchronization performance and responsiveness of a direct impact on stability of the device. In order to further optimize the synchronization system of the symmetric valve-controlled asymmetric hydraulic cylinder, firstly, the modeling and analysis of the valve-controlled asymmetric hydraulic cylinder is carried out. Based on the characteristics of asymmetric hydraulic cylinders and the wide range of load changes, a fuzzy compensation control method is proposed to improve the response speed of the hydraulic cylinder; for the synchronization problem of the hydraulic cylinder, a cross-coupled feedforward compensation control method is designed to reduce the synchronization error. Finally, the AMESim is used to build a hydraulic circuit system model as the control object, and Simulink is used to build a control system for simulation. The simulation results show that: compared with before the improvement, the synchronization control with dual compensation can significantly reduce the tracking error and synchronization error of the hydraulic synchronization system when the load is constantly changing and there is an eccentric load.