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Spacecraft multi-source disturbance random model prediction control method 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: 2021-04-30
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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  • Spacecraft multi-source disturbance random model prediction control method based on composite disturbance observer
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  • Spacecraft multi-source disturbance random model prediction control method 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 spacecraft multi-source disturbance random model prediction control method based on a composite disturbance observer, and the method comprises the steps: building a spacecraft attitude dynamic model, obtaining a spacecraft attitude dynamic model in a Lagrange form through conversion, and obtaining a spacecraft attitude dynamic model in a state space; discretizing the continuous-time spacecraft attitude kinetic model into a discrete-time spacecraft attitude kinetic model; designing a composite disturbance observer according to the multi-source disturbance type to observe multi-source disturbance, and converting random constraints into deterministic constraints; adopting a hybrid control method combining random model predictive control and anti-interference control so that the controlled quantity of the spacecraft is obtained. According to the method, the characteristics of multi-source interference can be fully utilized, the composite disturbance observer is designed, and the spacecraft attitude is controlled by combining the characteristics that random model prediction control can process constraint and non-matching interference.

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 Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 袁源徐杨郑子轩
Owner NORTHWESTERN POLYTECHNICAL UNIV
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