Manipal Journal of Science and Technology


The laboratory Twin Rotor Multiple Input Multiple Output System (TRMS) serves as a model of a helicopter. Station keeping or hovering in spite of uncertainties like sensor and/or actuator failures is important in Helicopter system and in TRMS. The paper discusses the design of H infinity controller, which is made reliable for TRMS sensor and actuator failure. The desired state feedback law is constructed in terms of a positive definite solution of an Algebraic Riccati equation. Further, closed loop stability of TRMS along with the H infinity controller is tested and its robust stability bound has been obtained.

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