Control allocation method for multi-mode conversion of rotor wing plane

Abstract

The invention provides a control allocation method for multi-mode conversion of a rotor wing plane. A linear variation curve of total control derivatives with forward flight velocities is obtained bycalculating dimension control derivatives of a helicopter control system and dimensional control derivatives of a fixed wing control system at the several forward flight speeds in a flight conversionphase of the rotor wing plane, thereby obtaining values of the control derivatives of a helicopter mode corresponding to the forward flight velocities. The values are made dimensionless and then fitted to obtain a variation curve of a weight coefficient of helicopter control input with the forward flight velocities. At the corresponding forward flight velocities, control input of a fixed wing modeis directly transmitted to an executing mechanism of the fixed wing mode, and the helicopter control input and the corresponding weight coefficient are combined and then transmitted to an executing mechanism of the helicopter mode. The control allocation method for the multi-mode conversion of the rotor wing plane can solve the redundancy control problem of two sets of control systems in the flight conversion phase of the rotor wing plane. In this way, only control instructions of three axes need to be given, which is the same as dealing with a conventional aircraft, when designing a flight control system.

Description

technical field [0001] The invention relates to a control distribution method for multi-mode conversion of a rotary wing aircraft, which is suitable for switching and controlling various flight modes involved in the flight process of the rotary wing aircraft. Background technique [0002] Rotary wing aircraft is a new type of manned / unmanned aircraft that has both the vertical take-off and landing performance of a helicopter and the high-speed cruise performance of a fixed-wing aircraft. The patent number is ZL201110213680.1, and the Chinese patent titled "A Rotary Wing Aircraft with Variable Flight Mode" is a typical model. The aircraft can realize helicopter flight mode, fixed-wing flight mode and conversion flight mode. Rotary wing aircraft has an aerodynamic layout of three surfaces such as canards, rotating wings and flat tail. Among them, the main wing, that is, the rotating wing, can be used as a rotor in the helicopter flight mode to provide the aircraft with the p...

AI Technical Summary

Problems solved by technology

However, in the switching flight mode, the pilot's control command will act on the helicopter control system and the fixed-wing rudder surface at the same time. If the corresponding control distribution design is not carried out at this time, the control effect of the same control command will be different. This is obviously unacceptable

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