A method for controlling and distributing the transitional flight mode of a composite rotor aircraft

Abstract

The invention discloses a method for controlling and distributing the transitional flight mode of a composite rotor aircraft, belonging to the control technical field of the composite rotor aircraft.This method is used to study the control plane control characteristics of a composite rotor aircraft when the helicopter mode and the fixed wing mode are converted to each other, presents a method ofredundancy assignment based on weighted hybrid multi-objective and a new method of redundancy assignment, an improved particle swarm optimization algorithm with high computational accuracy, reduces the design difficulty of the control algorithm, and effectively solves the problems of the control surface constraints, cross-coupling and non-linearity of the composite rotor aircraft. The control redundancy problem of the transition process between the helicopter mode and the fixed wing mode is solved, and the control surface control efficiency and flight stability are improved. The composite rotor aircraft using the method of the invention can adopt the same flight controller to realize full-mode flight, does not need to switch the controller in the transition mode, reduces the design difficulty of the system controller, and improves the safety of the transition mode switching.

Description

technical field [0001] The invention belongs to the technical field of flight mechanics and flight simulation, and in particular relates to a control distribution method for a composite rotorcraft transitional flight mode. Background technique [0002] The composite rotorcraft has a thrust device, a fixed wing and a rotor at the same time, which can not only realize the vertical take-off and landing, hovering flight of the helicopter flight mode, but also have the high speed, long range and long endurance flight capability of the fixed wing aircraft, and has been highly regarded. Helicopter research institutions and researchers around the world are concerned. At present, the research on the compound rotorcraft carrier-based UAV is still in its infancy at home and abroad. [0003] There is a mode switch during the flight of the compound rotorcraft. When hovering and flying at low speeds, the helicopter mode is mainly used for flight. When flying at medium speeds, the helicop...

AI Technical Summary

Problems solved by technology

[0005] At this stage, domestic and foreign control redundancy problems in the process of aircraft flight mostly use conventional control allocation methods, such as: pseudo-inverse method, chain method, direct allocation method, linear programming method, often for a single optimization objective or a single constraint condition , in the face of complex control objects, when dealing with complex constraints, the control performance is significantly reduced

In addition, when applying the intelligent allocation algorithm to solve the optimization goal, there are still problems such as slow search speed and low calculation accuracy, and the engineering realization is poor

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