Fault Accommodation in Control of Flexible Systems

New synthesis techniques for the design of fault accommodating controllers for e exible systems are developed. Three robust control design strategies, static dissipative, dynamic dissipative, and π-synthesis, are used in the approach. The approach provides techniques for designing controllers that maximize, in some sense, the tolerance of the closed-loop system against faults in actuators and sensors, while guaranteeing performance robustness at a specie ed performance level, measured in terms of the proximity of the closed-loop poles to the imaginary axis (the degree of stability ). For dissipative control designs, nonlinear programming is employed to synthesize the controllers, whereas in π-synthesis, the traditional D‐K iteration is used. To demonstrate the feasibility of the proposed techniques, they are applied to the control design of a structural model of a e exible laboratory test structure.