一阶系统的模型跟随输出自适应控制

The Adaptive Model Following Control of First Order Systems

本文提出一种更适用于一阶系统的模型跟随自适应控制算法。通过适当选择系统的状态表示,使系统的输出和它的状态同一,因而不用构造系统的状态;通过利用参考模型输出的先验值,减少了需在线计算的控制器参数。仿真和实验表明,当被控过程存在模外动态和输出干扰时,该算法仍具有较高的控制精度。

Based on the new method of adaptive model following control (AMFC)proposed in [3], a special AMFC algorithm of first order system is presented in this paper. Its main advantages are that 1) By making use of the character of first order system and by choosing a suitable system state expression, a first order AMFC system output can be the same as its state. So that there will be no state reconstruction in the system. 2) By using the anticipated value of model's output, number of the controller parameters of the AMFC system are reduced. The simulations and experiments given in this paper have denoted that even if the controlled process has unmodelled dynamics and output disturbances, a good control accuracy can still be achieved by using the special AMFC algorithm. A computer controlled two-channel electro-hydraulic loading system has been made available to the user, its loading synchro accuracy and static loading accuracy of each channel can all be controlled to less than 0.5%.