The paper describes the development of an automatic take-off system for helicopter. Design of automatic take-off control system is mandatory for manned as well as unmanned helicopter, which reduce the burden of pilot and increases the flying quality of the vehicle. In this paper, we present an H based automatic take-off system for helicopter. For this purpose, we consider typical four-bladed helicopter with conventional control. A single robust controller for altitude and attitude tracking are designed at single hovering altitude such that controller stabilized the closed loop system at all hovering altitude. The performance of the controller is evaluated in the presence of sensor noise and moderate vertical gust.
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