A multi-source error analysis method for spacecraft attitude control system
Focusing on high-precision control of spacecraft attitude,a complete error propagation chain dynamic analysis process for the spacecraft attitude control system was established.Firstly,the error sources of the spacecraft attitude control system were analyzed,and further proposed a univer-sal error modeling method for the measurement model and output model of sensors and actuators.Uncertainty was introduced into the error propagation chain in the form of quantifiable analysis.Then,using linearized covariance analysis and the improved unscented transform covariance analysis method based on SVD decomposition,the error propagation chain of the attitude control system was dynamically analyzed.Finally,the accuracy of the proposed method was verified by simulation tests and the error propagation was analyzed.The simulation results show that the proposed method can analyze the dynamic characteristics of the error propagation chain under the action of different error sources,and significantly improve computational efficiency while ensuring analysis accuracy.
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