The passive fault-tolerant control was studied for aero-engine distributed control system with parameter perturbation

Markov time-delay

data dropout and external disturbance when interval random actuator faults occurred. An optimal guaranteed cost fault-tolerant controller was designed under double constran of H∞ and cost performance index. At the beginning

uncertain parameters were described quantitatively. Based on the description a closed-loop augmented model was built. Then sufficient conditions for asymptotic stability with bi-index constraints of the augmented system were derived. The design approach of guaranteed cost fault-tolerant controller was proposed. Finally the optimal guaranteed cost fault-tolerant controller was designed based on consistency theory. Simulation results show that the devised controller ensures the closed-loop system asymptotically stable when interval random actuator faults occur

and have a certain H∞ performance. Besides

when low-pressure rotor speed has 1% step change

the maximum main fuel mass flow and throat area in this controller are 16.03% and 16.93%

respectively

of that in optimal robust H∞ fault-tolerant controller.