Time-delay observer and state feedback control of networked control system

We study a networked control system in which both values of the output time-delay and the control time- delay are greater than the sampling period,and the control time-delay follows a given random distribution law.Based on the current observer principle,we propose a time-delay observer with time-delay compensation by employing buffer and the time-stamping on the transmission data of sensor.The poles of the observer can be arbitrarily placed if the system is observable.The state feedback control system based on the proposed observer is designed.The separation principle of the compound system is proved.The effectiveness of the proposed method is verified by simulation.