轮对标定试验台先进PID压力控制的研究和应用

Research and Application for Hydraulic Loading in Wheel Load Calibration Test-Bed Based on Advanced PID

测力轮对标定试验台主要功能在于垂、横和纵三个方向液压加载力的实现,由于液压系统的非线性、其它方向力和机械结构带来的扰动性,严重影响液压加载过程。在常规PID控制算法的基础之上,综合了积分分离PID控制算法和不完全微分PID控制算法这两种改进PID控制算法,并将改进后的控制算法应用在测力轮对标定试验台的液压加载系统中。试验结果表明,该控制算法能够改善系统的动态性能和稳态精度,同时对于减少超调量、加快响应速度都有很好的促进作用。

Wheel load calibration test-bed for main function lies in the vertical, horizontal and vertical direction of the realization of the hydraulic loading force, due to the nonlinear hydraulic system, the structure of the direction of force and other mechanical disturbance of sex, the serious influence of hydraulic loading process. On the basis of general PID control, combining the integral separation PID control and the incomplete differential PID control it both improved PID control algorithm, and its application in wheel load for hydraulic load calibration test-bed. The test results show that the control method can improve system dynamic performance and steady-state precision, at the same time it has a very good role in promoting to the decrease of overshoot, and speed up of the response.