The problem of fault detection for aero-engine no-liner distributed control system was studied.Firstly

a new non-linear modeling method for aero-engine based on Takagi-Sugeno(T-S) fuzzy model and flight envelop division was proposed

and the model of the distributed control system with network derivational time-delay was established by using this method.Secondly

if the distributed control system was regarded as a discrete switch system

a fault detection observer with time-delay compensation was designed

and the sufficient conditions of asymptotically stability for the observer-based residual system were presented.The total simulation took 20 seconds

a step fault with 0.0025 amplitude happened at the 12th second

the simulation results show that: the fault observer was asymptotic stable for preceding 12 seconds

and the residuals rapidly increased and exceeded the threshold value at the 12th second

thereby the fault would be detected.