Flight control system for medium-high-speed and large-maneuvering unmanned aerial vehicle

Abstract

The invention provides a flight control system for a medium-high-speed and large-maneuvering unmanned aerial vehicle, relates to the technical field of unmanned aerial vehicle control, can consider conventional flight and maneuvering flight task requirements of the unmanned aerial vehicle, has relatively high tolerance to bounded disturbance in a flight process, effectively improves the tracking performance of a control instruction, and improves the reliability of the unmanned aerial vehicle. The maneuvering characteristic of the unmanned aerial vehicle is fully exerted; the system comprises four control subsystems including an elevator, an aileron, a rudder and an accelerator. The elevator control subsystem comprises a decoupling control module, an instruction inner loop module, a guidance loop module and an attack angle protection module; the aileron control subsystem comprises a decoupling control module, an instruction inner loop module, a guidance loop module and a stability augmentation module; the rudder control subsystem comprises a decoupling control module, a stability augmentation module and a sideslip angle suppression control module; the accelerator control subsystem comprises an acceleration control inner loop and a guidance loop; the system comprehensively realizes control compensation from three aspects of manipulation coupling, inertia coupling and motion coupling.

Description

technical field [0001] The invention relates to the technical field of unmanned aerial vehicle control, in particular to a flight control system for medium-high speed and large maneuverable unmanned aerial vehicles. Background technique [0002] With the complexity and diversification of modern warfare environment and missions, traditional low-speed UAVs have gradually been unable to meet the mission requirements of modern warfare, and a variety of medium-high-speed and large-maneuvering UAVs have attracted more and more attention. Compared with traditional low-speed UAVs, many technical difficulties have been added to the flight process of medium-to-high speed and large maneuverable UAVs: [0003] 1. Big disturbance. During the flight of UAVs, UAVs are affected by multiple factors, among which the most typical complex interference factor is atmospheric disturbance, which easily excites time-varying and nonlinear aerodynamic characteristics by causing sudden changes in dyna...

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Problems solved by technology

[0004] 2. Nonlinear

When the UAV is flying with great maneuverability, there is a severe cross-motion between the channels, resulting in nonlinear coupling such as inertial coupling and motion coupling. Greatly increases the difficulty of UAV flight control

[0006] Most of the flight control strategies of traditional low-speed UAVs adopt the attitude angle control mode based on PID control theory. The above-mentioned technical difficu

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