Spacecraft attitude tracking control method based on discontinuous adaptive control

A technology of self-adaptive control and tracking control, applied in the directions of self-adaptive control, non-electric variable control, attitude control, etc., can solve the problems of poor spacecraft attitude tracking control effect and poor robustness of spacecraft attitude tracking control system, etc. Overcome poor robustness, good control performance, and weaken the effect of chattering
CN110347173AActive Publication Date: 2019-10-18HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2019-10-18

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Abstract

The invention provides a spacecraft attitude tracking control method based on discontinuous adaptive control, belongs to the technical field of spacecraft attitude tracking control, and solves the problem that a spacecraft attitude tracking control system is poor in robustness so that a spacecraft attitude tracking control effect is poor in the case of modeling uncertainty, external disturbances and input saturation effects. The spacecraft attitude tracking control method comprises the following specific steps of step 1, establishing an earth centered inertial oIxIyIzI, a spacecraft body coordinate system oBxByBzB and an expected reference coordinate system oRxRyRzR; step 2, according to the coordinate systems established in step 1, obtaining the spacecraft attitude kinematics and a kinetic equation described by using an attitude quaternion, and a spacecraft error attitude kinematics equation and the kinetic equation, namely the attitude tracking control system; and step 3, based on the step 2, based on a sliding mode surface of an integral terminal, designing an attitude tracking controller considering an unknown external disturbance torque and the rotational inertia uncertainty.The spacecraft attitude tracking control method based on the discontinuous adaptive control provided by the invention can be applied to spacecraft attitude tracking control.
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Description

technical field

[0001] The invention belongs to the technical field of spacecraft attitude tracking control, and in particular relates to a spacecraft attitude tracking control method. Background technique

[0002] Attitude control of a spacecraft refers to exerting an external action on the target spacecraft to change its position relative to the inertial reference system or other reference coordinate systems under the constraints of the relevant attitude kinematics and dynamics equations and according to the specific requirements of the space mission. pointing control technology. In order to ensure the normal operation of the spacecraft, in addition to being equipped with a fully functional hardware system, it is also necessary to design an attitude control algorithm that can explicitly deal with various system uncertainties.

[0003] In recent years, sliding mode control has been favored by researchers in the aerospace field, and has been widely studied and applied. Whe...

Claims

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