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H-infinity Optimal Performance Design of Maglev Control System based on Bode Integral Constraint

Conventional H-infinity control design methods for maglev control system design cannot acquire the optimum disturbance suppression performance. In the present study, based on the performance requirements of Bode integration, the H-infinity state feedback design was improved and applied to the design of unstable maglev control system. More importantly, the Bode integral limit requirements for system performance were considered to make the designed method more practical. Meanwhile, the design principles for these parameters are provided to avoid the need for repeated debugging. A simulation of a maglev control system showed that the Bode integral cannot only evaluate the system performance, but also guide the control design. For an unstable controlled plant, the H-infinity state feedback control method becomes a complete design scheme that can be used to design a system capable of attaining optimal performance under the robustness constraints of the Bode integral theorem. In addition, the proposed method can also be applied to the design of the control systems of other unstable plant, such as an inverted pendulum.