Structure-specified H infinity optimal control design for practical applications: A genetic approach

[[abstract]]In the conventional H infinity optimal output feedback control design, the order of the controller is much higher than that of the plant. It is not easy to implement the H infinity optimal controller for high-order systems in practical engineering applications. In this work, a robust H infinity optimal design problem under a structure-specified controller is investigated for systems with parameter variations and disturbance uncertainties. A simple and facile design algorithm is proposed to solve the structure-specified H infinity optimization problem via genetic searching approach from suboptimal perspective. The proposed design method is very suitable for practical control systems. Therefore, the trench between the theoretical H infinity control and practical engineering designs can be filled up. Two examples involving a single input-single output (SISO) phase-locked-loop motor speed system with a lead/lag type controller and an MIMO supermaneuverable F18/HARV fighter aircraft system with a PID-type controller are given to illustrate the design procedure and exhibit the performance of the proposed method.[[fileno]]2030106010069[[department]]電機工程學