A flight control method for vertical/short take-off and landing aircraft

Abstract

The invention provides a transition process control method of a vertical / short take-off and landing aircraft, wherein the method comprises the steps of model linearization, calculation of a desired torque, elimination, optimization by using a steepest descent method, and the like. By designing an optimization target and an actuator penalty function, under the premise of priority control of the attitude, the horizontal acceleration (or deceleration) of the aircraft is maximized, and a rotation angle tends to an expected numerical value at the highest speed, thus completing the transition process control at the highest speed. According to the method, the execution ability of the actuator is comprehensively considered via the steepest gradient descent method, and the transition process can becompleted within a short time and at a stable posture. At the same time, when running on an onboard computer, the method has the advantages of less iterations and small calculation amount, and can bedeployed on a flight control computer with general computing power.

Description

technical field [0001] The invention relates to a flight control method for a vertical / short take-off and landing aircraft, and belongs to the technical field of flight control. Background technique [0002] V / STOL aircraft are fixed-wing aircraft that can land and take off vertically or at very short distances. This type of aircraft takes into account the high aerodynamic efficiency of fixed-wing aircraft and the flexible take-off and landing characteristics of traditional rotorcraft, and is widely used in military and civilian applications. The vertical / short-range aircraft has three flight states: low-speed hovering, high-speed cruising and transition. The transition process has to experience a large speed change, and the entire controlled object presents the characteristics of strong coupling and strong nonlinearity, which brings great challenges to the control method. Traditional control methods are difficult to maintain a balance in trajectory control quality, calcul...

AI Technical Summary

Problems solved by technology

These control methods are difficult to take into account the transition process time and the trajectory quality of the transition process while considering the execution capability of the actuator

Finally, in the control process, it is often necessary to perform inverse operations on high-dimensional matrices, which have large calculation and storage costs, and are not suitable for real-time processing operations by on-board computers.

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