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Adaptive fault tolerance control method for flexible liquid-filled satellite attitude based on fault characteristic model

A technology of satellite attitude and fault characteristics, applied in adaptive control, attitude control, general control system, etc.

Active Publication Date: 2016-05-25
HEBEI NORMAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Although the adaptive control method based on the characteristic model is convenient and easy to implement in engineering, there is no documented and open technical method for applying this method to the design of fault-tolerant controllers.

Method used

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  • Adaptive fault tolerance control method for flexible liquid-filled satellite attitude based on fault characteristic model
  • Adaptive fault tolerance control method for flexible liquid-filled satellite attitude based on fault characteristic model
  • Adaptive fault tolerance control method for flexible liquid-filled satellite attitude based on fault characteristic model

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Embodiment

[0034] The specific implementation steps of the attitude adaptive fault-tolerant control method of the flexible liquid-filled satellite based on the fault characteristic model:

[0035] In the first step, according to the attitude dynamic equation of the flexible liquid-filled satellite given by (1), the fault characteristic model described by (2) is established:

[0036] I ω · + ω × I ω + C 0 η ·· + G q ·· = ...

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Abstract

The invention belongs to the automatic control technology field and relates to an adaptive fault tolerance control method for flexible liquid-filled satellite attitude based on a fault characteristic model. According to the method, when a system in under the condition of liquid shaking, flexible vibration and external interference, a fault tolerance controller based on the fault characteristic model is designed for performer faults. The method comprises steps that (1), the fault characteristic model is established according to a flexible liquid-filled satellite attitude kinetic equation; (2), a parameter estimation algorithm is utilized to identify a coefficient of the fault characteristic model, and a coefficient estimation value of the fault characteristic model is acquired; (3), the adaptive fault tolerance controller is designed according to the coefficient estimation value of the fault characteristic model; and (4), a control torque is acquired through the adaptive fault tolerance controller, and the control torque is applied to the satellite attitude control system to control a satellite attitude angle. Through the method, control precision before and after fault generation is guaranteed to be quite high, and the time for realizing the stable state is short.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to an attitude adaptive fault-tolerant control method of a flexible liquid-filled satellite based on a fault characteristic model. Background technique [0002] With the continuous development of aerospace technology, satellites undertake more and more tasks, and the structure becomes more and more complex. At the same time, the on-orbit life of satellites is required to be greatly extended, and the requirements for attitude control accuracy are continuously improved. Due to the increase in the amount of liquid fuel carried by large and complex satellites and the increase in size of the elastic attachments, the influence of liquid sloshing and vibration of elastic attachments on the attitude of the spacecraft is becoming more and more serious. One of the difficulties in control system design. Satellites operate in the environment of vacuum, weightlessness, high and low te...

Claims

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Application Information

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IPC IPC(8): G05B13/04G05D1/08
CPCG05B13/042G05D1/0825
Inventor 孙多青马晓英
Owner HEBEI NORMAL UNIVERSITY OF SCIENCE AND TECHNOLOGY
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