Attitude coupling control method for hypersonic vehicle

Abstract

A hypersonic aircraft attitude coupling control method relates to the field of hypersonic aircraft dynamics and control; step 1, decompose the motion of the aircraft into longitudinal motion and lateral heading motion; step 2, establish an 8th-order motion equation of the hypersonic aircraft; and according to the 8th-order motion equation The motion equation establishes a simplified model of motion coupling analysis; step 3, judge whether the simplified model of motion coupling analysis is a favorable coupling; when it is a favorable coupling, no processing is performed; when it is a non-favorable coupling, determine the first coupling factor K 1 ; Step 4, calculate the first characteristic root λ of the 8th-order motion equation in step 2 1 and the second characteristic root λ 2 ; compare the first characteristic root λ 1 and the second characteristic root λ 2 ; Determine the second coupling factor K according to the comparison result 2 ; Step 5, pass the first coupling factor K 1 and the second coupling factor K 2 Feedback compensation is performed for the 8th-order motion equation; the invention is suitable for a plane-symmetric hypersonic aircraft with a large lift-drag ratio, and improves the rapidity of the aircraft's rolling maneuvering response.

Description

technical field [0001] The invention relates to the field of dynamics and control of a hypersonic aircraft, in particular to an attitude coupling control method of a hypersonic aircraft. Background technique [0002] As one of the disruptive technologies in recent years, hypersonic aircraft has become one of the weapons and equipment that major military powers focus on developing and competing with, and related technologies have also become key technologies that need to be broken through. The failure of some foreign flight tests in recent years is precisely because the movement mechanism of the aircraft has not yet been recognized, and technological breakthroughs cannot be achieved. Among them, the dynamic coupling characteristics of the aircraft and the corresponding control technology are represented. The characteristics of large lift-to-drag ratio, large maneuverability, and severe coupling of lateral heading channels of hypersonic vehicles make the dynamic coupling prob...

AI Technical Summary

Problems solved by technology

However, various nonlinear control methods also have various restrictions. For example, sliding mode control and other methods select high-gain controller coefficients in order to eliminate oscillations, but this will increase the sensitivity of the controller; There are a large number of controller parameters, and there is no intuitive rule to follow for parameter adjustment

Such methods will bring great limitations in engineering applications

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