Robust fault detection of a class of networked control systems for flight vehicle

The problem of robust fault detection is studied for a class of networked control system for flight vehicles with Markov short delay and packet dropout. The networked control system for flight vehicle is modeled as a discrete finite Markov jump linear system by combining Markov short delay and packet dropout as a finite Markov process and establishing corresponding model for packet dropout. Based on this model, the residual generator is constructed and the problem of fault detection is formulated as a H_∞ filtering problem. The existence condition of the fault detection filter and the solutions are derived by using the linear matrix inequality technique. Simulation results show that the modeling method can reduce the influence of packet dropout on fault detection capability effectively. The results also show that the proposed fault detection method is sensitive to the fault and robust to unknown disturbance.