Aircraft control allocation method based on direct allocation method and null space

Abstract

The invention discloses an aircraft control allocation method based on the direct allocation method and a null space. The method has the advantages that the maximum achievable torque in an expected torque direction is obtained through the direct allocation method, and control allocation is carried out on the obtained maximum achievable torque through the null space control allocation method, so that an actual output torque obtained through the control allocation is as close to the maximum achievable torque as possible, premature saturation of an aircraft control surface is avoided, and the application range of a pseudo-inverse control allocation algorithm based on the null space is further extended.

Description

technical field [0001] The invention belongs to the field of aircraft control, and in particular relates to an aircraft control distribution method. Background technique [0002] With the continuous improvement of the reliability, maneuverability, safety and stealth performance of modern aircraft, the aerodynamic layout of modern aircraft has undergone great changes compared with traditional aircraft. Compared with traditional aircraft, modern aircraft often adopt redundant configuration schemes composed of multiple control variables, which makes the design of flight control laws of modern aircraft increasingly complex using traditional controller design methods. To solve this problem, the control assignment problem arises as the times require. After nearly 30 years of continuous research and exploration by many scholars and experts at home and abroad, the control allocation method has become more and more mature. Control assignment, as an effective method to deal with the...

AI Technical Summary

Problems solved by technology

The pseudo-inverse method applies the optimal performance index to the control assignment problem, but using this method, there are still some unreachable control torques in the torque reachable set, which affects the application range of the pseudo-inverse method

The cascaded pseudo-inverse method further expands the solution space, but when the desired torque exceeds the boundary of the reachable torque set, control optimization cannot be performed

[0005] Aiming at the shortcomings of the pseudo-inverse method and the cascaded pseudo-inverse method, the zero-space vector correction strategy is used to correct the pseudo-inverse solution, but when the expected torque exceeds the reachable torque set, the pseudo-inverse solution cannot be corrected by using the zero-space vector, which limits The scope of use of this method

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