Abstract:

This paper considers the multiobjective integrated design of fault detection systems for linear time-invariant systems with unknown inputs. First, the residual generator is designed in such a way that the residual is decoupled from the unknown inputs that mainly influence the system. Then, the rest freedom is used to improve the robustness of the residual generator to other unknown inputs and its sensitivity to faults. By virtue of the close relationship between the parity space approach and the observer based approach, the order of the residual generator can be kept at a low and flexible level.