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Fault tolerant control method for a spacecraft equipped with a flywheel based on robust adaptation

A robust adaptive and fault-tolerant control technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve rare problems and so on

Active Publication Date: 2015-09-02
陕西智星空间科技有限公司
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  • Abstract
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Problems solved by technology

Although there are some PFTCS research results of spacecraft actuators in the published literature, there are not many results that can obtain fault information and apply it to PFTCS without using FDD devices

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  • Fault tolerant control method for a spacecraft equipped with a flywheel based on robust adaptation
  • Fault tolerant control method for a spacecraft equipped with a flywheel based on robust adaptation
  • Fault tolerant control method for a spacecraft equipped with a flywheel based on robust adaptation

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Embodiment Construction

[0106] Below in conjunction with accompanying drawing this scheme is described in detail. figure 1 It is a schematic diagram of the fault-tolerant control scheme of the present invention. In summary, the present invention is based on a robust self-adaptive spacecraft fault-tolerant control method with a flywheel, the specific steps of the method are as follows:

[0107] Description of the coordinate system definition:

[0108] The coordinate systems involved in the present invention have: inertial coordinate system, take the earth-centered equator inertial coordinate system as the reference system here, and the origin is fixedly connected to the earth's center o I , o I x I Axis in the equatorial plane, pointing towards the equinox, o I z I The axis is perpendicular to the equatorial plane and coincides with the earth's rotation angular velocity vector, o I the y I axis in the equatorial plane according to the right-hand rule and o I x I , o I z I Form an orthogona...

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Abstract

Provided is a fault tolerant control method for a spacecraft equipped with a flywheel based on robust adaptation. The method comprises five steps of: 1, establishing a spacecraft kinematical equation; 2, establishing a spacecraft kinetic equation; 3, performing desired angular velocity locus design; 4, performing controller output torque design; and 5, performing numerical simulation. Under the circumstance that a FDD device is not used, the method online estimates a triaxial torque fault factor and designs a robust adaptive fault tolerant controller. The research aims at enriching spacecraft PFTCS methods and providing technical support for spacecraft attitude control in the future.

Description

technical field [0001] The invention relates to the technical field of spacecraft attitude control. Specifically, it relates to a robust adaptive-based fault-tolerant control method for spacecraft with flywheels. Using this method can ensure that the designed fault-tolerant control method can still effectively realize the attitude control of the spacecraft when there are external disturbances in the spacecraft and the reaction flywheel as the actuator has a torque loss failure. Background technique [0002] Fault-tolerant control means that when some components in the control system fail, the system can still complete the control task safely under the condition that the expected performance index or performance index is slightly reduced (but acceptable). Research on fault-tolerant control makes it possible to improve the security and reliability of complex systems. [0003] Fault Tolerant Control System (FTCS) can be divided into two categories: active fault tolerant contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 丁立金磊
Owner 陕西智星空间科技有限公司
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