The maneuverability is a key factor to determine whether a helicopter could finish certain flight mission success-fully or not. The inverse simulation is commonly used to calculate the controls of a helicopter to complete certain kind of maneuver flight and to assess the maneuverability. A general method for inverse simulation of maneuver flight to helicopters with flight control system online is developed in this paper. A describing function is established to provide general mathematical descriptions of different kinds of maneuvers. A comprehensive control solver based on the optimal linear quadratic regulator theory is developed to calculate the pilot controls of different maneuvers. The coupling problem between pilot controls and flight control System outputs is well solved by taking the flight control system model into control solver. The inverse simulation of three different kinds of maneuvers with different agility requirements defined in the ADS-33E-PRF is implemented based on the developed method for a UH-60 helicopter. The results show that the method developed in this paper can solve the closed-loop inverse simulation problem of helicopter maneuver flight with high reliability as well as efficiency.
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