论文部分内容阅读
为了电液伺服系统解决泵控高效节能性与阀控快速响应性及控制精度高不兼容的特性,搭建基于变频调速的泵阀联合系统。首先对泵阀联合控制系统做模型分析,为了改善系统的节能性,建立基于变频调速的泵控回路。同时运用模糊PID控制算法设计压力控制器,实时监控泵口压力,平稳快速的调节电机转速。为了提高液压缸位置精度,阀控回路设计前馈补偿PID控制,对液压缸位移实时追踪。通过AMEsim与Simulink的联合仿真,表明泵阀联合控制系统相比传统的电液比例伺服系统响应速度更快,控制精度更高,节能性明显得到提升。
In order to solve the problem of high efficiency and energy saving of pump control, which is incompatible with the rapid response of valve control and high control precision, the electro-hydraulic servo system is set up as a combined system of valve and pump based on frequency conversion speed regulation. First of all, the valve control system to do the model analysis, in order to improve the system’s energy-saving, based on the frequency control of the pump control loop. At the same time, fuzzy PID control algorithm design pressure controller, real-time monitoring of pump port pressure, smooth and rapid adjustment of motor speed. In order to improve the accuracy of the hydraulic cylinder position, valve control loop design feedforward compensation PID control, hydraulic cylinder displacement real-time tracking. Through the joint simulation between AMEsim and Simulink, it shows that the pump-valve combined control system has faster response speed and higher control precision compared with the traditional electro-hydraulic proportional servo system, and the energy saving is obviously improved.