Stability Analysis of Networked Control Systems with Multiple Constraints

The stability problem for multiple-input multiple-output (MIMO) networked control systems (NCSs) under external disturbance, packet dropout and channel noise interference is investigated in this paper. External disturbance exists in the forward channel, packet dropout and channel noise interference coexist in the feedback channel and the occurrence of packet dropout is assumed to obey Bernoulli distribution. The stability conditions of the NCSs were obtained through system stability theory, frequency domain method and a variety of decomposition techniques. The results show that the stability of NCSs is affected by the inherent characteristics of NCSs, external disturbance, packet dropout and channel noise. Finally, the effectiveness and superiority of the proposed method is verified by a simulation example.