Performance and stability analysis of wireless Tele-Control system

In this paper, we intend to design a joint system of control and communication engineering which is called Tele-control system. Tele-Control system consists of control plant, controller, feedforward channel and feedback channel in the closed-loop control system. Basically, channels would be multipath channel due to the utilization of wireless communication system. The Existence of multipath channel in control systems may cause internal stability. Therefore, in order to design a suitable controller for the closed-loop system and to avoid instability, we have to consider the existence of feedforward and feedback channel. Thus, channel equalizer is proposed to implement in the closed loop system. The closed loop system consists of PID (proportional, integral and derivative) controller and channel equalizer. Channel equalizer is designed based on FIR filter and implemented in feedforward and feedback side of channel. In this paper LMS, NLMS and RLS algorithm have implemented. The control plant is set to be small-scaled wind turbine and aim to control its angular velocity from distant. The angular velocity is observed and controlled to avoid the excessive angular velocity and maintain the desire value. The evaluation of jointed system has done by step response of the closed-loop. Moreover, the performance of equalizers is evaluated by taking NMSE. Eventually, we could summarize that NLMS could perform smoother than other algorithms.