Control system and control method for posture rail coupling under shifting state of big barycenter based on engine pre-swinging

Abstract

The invention relates to a control system and a control method for posture rail coupling under the shifting state of a big barycenter based on engine pre-swinging. The system comprises a barycenter estimation module, a pre-swinging angle calculation module, a procedure angel de-noising and compensation module, a control feedback bias calculation module, an incremental type PID control module and an equivalent servo swinging angle instruction and amplitude limiting module. The system provided by the invention is used for solving the problem of high-precision control on the shifting posture rail coupling of the big barycenter of an on-orbit aircraft. An excellent engineering application effect is achieved.

Description

technical field [0001] The invention relates to an attitude-orbit control coupling control system and method under large center-of-mass lateral movement based on engine pre-swing, and belongs to the technical field of on-orbit aircraft control. Background technique [0002] Orbital transport aircraft, in the process of orbital deployment satellite separation, there is a large mass deviation. For example, if there is a center of mass shift of 45mm in a certain task, the disturbance torque will reach more than 200N·m. If only the attitude control engine is used to control, the control torque is 68N·m, the current control capability of the attitude control engine cannot meet the control requirements, and the orbit control engine needs to have the ability to swing. Multiple large-scale orbit transfers are required during flight. The main engine of the aircraft is used for both orbit control and attitude control. The attitude control and orbit control interact with each other, re...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide an attitude-orbit coupling control system and method based on engine pre-swing under large center-of-mass lateral movement, and to fully consider the impact of the lateral movement of the center of mass of the on-orbit aircraft on the control system. Influence, to solve the influence of the center of mass lateral movement on the control characteristics, the influence of high-frequency noise on the control, high-precision tracking control and other issues, to ensure high-precision control of the aircraft

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