A Stochastic Model Predictive Control Method for Spacecraft Multi-source Disturbance Based on Composite Disturbance Observer

A disturbance observer and stochastic model technology, applied in the field of spacecraft control, can solve problems such as multi-source interference in spacecraft attitude control

Active Publication Date: 2022-05-13
NORTHWESTERN POLYTECHNICAL UNIV +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-source interference stochastic model predictive control method for spacecraft based on a composite disturbance observer, which solves the existing problems of multi-source interference in spacecraft attitude control in the prior art

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  • A Stochastic Model Predictive Control Method for Spacecraft Multi-source Disturbance Based on Composite Disturbance Observer

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[0060]The present invention is described in further detail below in conjunction with accompanying drawing:

[0061] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, and therefore cannot be construed as limiting the present invention; the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be construed as indicating or implying relative importance; in addition, unless otherwise Clearly stipulated and limited, the terms "installation",...

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Abstract

The invention discloses a multi-source interference stochastic model predictive control method for a spacecraft based on a composite disturbance observer. The method establishes a spacecraft attitude dynamics model, and obtains a Lagrangian form of spacecraft attitude dynamics model through transformation, and then Obtain the spacecraft attitude dynamics model in the state space; discretize the continuous-time spacecraft attitude dynamics model into a discrete-time spacecraft attitude dynamics model; design a composite disturbance observer to observe multi-source disturbances according to the types of multi-source disturbances , and transform random constraints into deterministic constraints; a hybrid control method combining stochastic model predictive control and anti-jamming control is used to obtain the control quantity of the spacecraft. The present invention can make full use of the characteristics of multi-source interference, design a compound disturbance observer, combine the characteristics of random model predictive control that can deal with constraints and non-matching interference, and control the attitude of the spacecraft.

Description

【Technical field】 [0001] The invention belongs to the technical field of spacecraft control, in particular to a multi-source disturbance stochastic model predictive control method for spacecraft based on a compound disturbance observer. 【Background technique】 [0002] In recent years, attitude control of spacecraft has been attracting attention due to its important role in critical orbital missions. To accomplish these tasks, the spacecraft may need to rotate along a relatively large angular amplitude orbit, which can be described by nonlinear differential equations. In addition, in the attitude control problem, the uncertainty of the spacecraft mass, the motion of the onboard payload, the rotation of the solar panels, and the fuel consumption must also be considered simultaneously, and these two factors make the attitude control of the spacecraft very difficult. Therefore, it is necessary to study a method to solve this problem, and its research significance and engineerin...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 袁源徐杨郑子轩
Owner NORTHWESTERN POLYTECHNICAL UNIV
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