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The attitude control and disturbance rejection problems are investigated in this paper for a flexible spacecraft during attitude maneuver. Based on the internal model principle, a dynamic disturbance compensator is designed to account for the uncertainty caused by sinusoidal disturbances with known frequencies. With the compensator, a novel robust Lyapunov-based controller that requires only the attitude...
To deal with bounded parametric uncertainties and external disturbances existed in a flexible spacecraft with control moment gyroscopes as actuator, an adaptive robust attitude control algorithm is presented in this paper. With the proposed control law, robust stability is achieved, as well as system chattering is weakened. A steering law with modified robust coefficient is also proposed in this paper...
Aiming at meeting the needs of high precision and high stability in large angle attitude maneuver control for flexible spacecraft, a self-adjusting sliding-mode control law based on RBF neural network was proposed. A delay factor in exponential form was introduced into the reaching-law of sliding-mode control to improve the stability of maneuver process. An online self-adjusting factor was designed...
The classical Bang-Coast-Bang path spectrum was analyzed by FFT in order to select the path parameters which were fit for flexible spacecraft attitude maneuver. Spectrum expression of BCB path was derived by means of DFT. The relation between the path parameters and spectrum as well as maneuver time was studied by analyzing the spectral characteristics of BCB path. A selection method of BCB path parameters...
A novel attitude control strategy based on active disturbance rejection control (ADRC) and input shaping technique was proposed for a flexible spacecraft without angular velocity sensors. Aiming at achieving high rapidity and high pointing accuracy, we focus on the suppression of vibration of flexible appendages when the spacecraft's attitude maneuvers a large angle. In the proposed scheme, a transient...
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