高速材料拉伸机模型预测控制系统设计

Design of the Model Predictive Control System of A High-speed Tensile Machine

高速材料拉伸机用于测试被试件在高速拉伸条件下材料特性,电液伺服系统具有高出力、速度快的特点,因此常被应用到高速材料拉伸机系统中。但是当拉伸阶段为毫秒级别时,电液伺服阀的响应延迟问题也变得无法避免。面对这个问题,普通PID控制显得力不从心。利用系统的近似数学模型,对未来一段时间系统的输出量进行预测的模型预测控制(MPC)方法则被应用于所设计的一种基于电液伺服控制系统的高速材料拉伸机,从而对系统输出提前进行控制,有效避免了系统延迟带来的问题,对整个系统实现了实际有效的控制。

High-speed materi specimens. widely used inevitable d Electro-hydraulic servo al tensile machines are system has advantages of used in high-speed material tensile machines. However, whe elay of reponse predicts a period of output output in advance to avoid to test high-speed tensile properties power output and high speed, thus it n it comes to milliseconds＇ stretch, with of valves, ordinary PID control would be useless. Model predictive control （MPC） in the future based on the mathematical model of system, then it could control the problems caused by high delay in system. MPC method is able to control the whole system effectively.