Vertical/short-range take-off and landing airplane flight control method

Abstract

The present invention provides a vertical / short-range take-off and landing airplane flight control method. A transition process controller, a routine flight mode controller and a flight mode determiner are provided. Through adoption of a prediction control method, the transient process flight mode controller is configured to observe the state and the disturbance of a system by employing an extended Kalman filter based on the expansion system formed by a vertical / short-range take-off and landing airplane partial linear model and a propulsion system linear model and design a prediction controller weight matrix changed with flight dynamic pressure and a manipulator desired value. The flight mode determiner takes a propulsion system state as a basis for determination, and when the determination basis is satisfied, the transition process controller is switched to the flight mode controller. The vertical / short-range take-off and landing airplane flight control method considers the propulsion system dynamic characteristic and the dynamics modeling uncertainty, is able to realize the manipulator coordination control and flight mode stable switching, is applicable to the vertical / short-range take-off and landing airplane, and is fast in taking-off speed and small in attitude disturbance, etc.

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] Vertical / short take-off and landing aircraft refers to fixed-wing aircraft that can take off and land vertically or in a very short distance. This type of aircraft has the aerodynamic layout of general fixed-wing aircraft and has a relatively fast flight speed. V / STOL aircraft have three main flight modes: normal flight mode, hover mode and transition flight mode. In the normal flight mode, the V / STOL aircraft generates lift from the wings, the engine provides the thrust, and the aerodynamic control surface is used as the manipulator. In the hovering mode, the vertical / short take-off and landing aircraft power system jets generate lift vertically downward to support the weight of the aircraft. At this time, the engine thrust, thrust vector and ejection nozzle are the ma...

AI Technical Summary

Problems solved by technology

[0003] At present, for the research on flight control methods of V / STOL aircraft, domestic and foreign scholars mainly use control methods based on dynamic inverse, without considering the influence of dynamic characteristics of the propulsion system on the flight control system, and without considering dynamic construction when switching flight modes. Due to the influence of model error, the aircraft attitude is greatly disturbed when the flight mode is switched.

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