Attitude control of multibody remote sensing satellite with coupled moment cancellation device
Remote sensing satellites with multiple degrees of freedom optical payload can perform imaging tasks while maintaining their attitudes stable.This paper investigates the attitude control of multibody remote sensing satellites with coupled moment cancellation devices.Firstly,a multibody remote sensing satellite dynamics model containing a 2-DOF optical payload is established based on the explicit Kane method.Then,an extended state observer is built to estimate the total internal and external disturbances suffered by the satellite body,and a satellite body attitude control law is de-signed based on the extended state observer.Finally,an internal coupled moment cancellation scheme based on momentum wheel is designed.By designing the command speed of the momentum wheel,the moment generated by the momentum wheel is used to offset the interference moment act-ing on the satellite body by the rotation of the optical payload,avoiding the problem of excessive am-plitude of the attitude control moment of the satellite body.The numerical simulation verifies the cor-rectness and effectiveness of the established satellite dynamics model and the control scheme.
multibody satelliteKane equationextended state observer
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