基于前馈-自抗扰算法的换热器动态试验温度控制研究

In order to meet the temperature parameter control requirements of the heat exchanger test measurement and control system in the dynamic heat transfer test, the dynamic model of the controlled temperature object in the test system is analyzed, and a feedforward-active disturbance rejection control algorithm for temperature is designed. The dynamic heat transfertest object is a shell-and-tube heat exchanger. The test process is heat transfer for forced convection of the fluid in the tube side and natural convection of the fluid in the shell side. During the test, the fluid in the tube side is recycled, and the inlet temperature of the tube side is required to be stable. The control algorithm makes full use of the model information, uses the shell side temperature as the tube side temperature interference to design feedforward compensation for it. At the same time, the active disturbance rejection control algorithm is designed to deal with the model deviation problem.The system model is built by using AMESim software, and a control algorithm is designed by Simulink, so as to conduct the joint simulation for AMESim/Simulink. By comparing with a variety of control algorithms, it can be found that in the heat transfer process of shell side temperature change interference, the use of feedforward-active disturbance rejection control algorithm can make the tube side inlet temperature fluctuation become smaller and achieve stability faster.