Abstract
A compound control based on active disturbance rejection control (ADRC) scheme and slide mode control (SMC) is proposed to investigate the attitude tracking problem for a spacecraft with modeling uncertainties, external disturbances, actuator failures, and actuator saturations simultaneously. A positive term including control input is separated from the system, and then, the active disturbance rejection concept and the extended state observer (ESO) are applied to deal with the general uncertain item caused by uncertainties, external disturbances, actuator failures, and actuator saturations. The sliding mode surface is designed to transform the attitude tracking problem into attitude stabilization problem. In order to deal with the actuator saturations, a saturation degree coefficient and its corresponding adaptive law are introduced. Compared to other existing references, the proposed scheme does not need to know the structure or upper bound information of the inertial matrix uncertainties and external disturbances. Finally, the stability of the closed-loop system is analyzed by using input to state stability theory. Simulation results are given to verify the effectiveness of the proposed scheme. More importantly, the proposed technique can also be applied to the attitude stabilization of other aircraft, such as the attitude of unmanned aerial vehicle and helicopter in maritime rescue.
Highlights
With the development of space missions, the reliable control scheme is significantly important for the rigid spacecraft
A robust control law based on the mini-max approach and the inverse optimal approach is proposed for the attitude control with external disturbances [8]
In [9], the inverse optimal feedback control based on integrator backstepping is proposed for rigid spacecraft without considering the disturbances and uncertainties. e optimal adaptive controller is designed to achieve attitude tracking for rigid spacecraft [10]
Summary
With the development of space missions, the reliable control scheme is significantly important for the rigid spacecraft. In [16], an adaptive backstepping sliding mode control scheme is designed to achieve attitude tracking for flexible spacecraft with actuator failures, disturbances, and uncertainties. En, the authors proposed an adaptive sliding mode control for spacecraft subjected to partial loss of actuator effectiveness fault, and the control law is modified to ensure that the control signal never contains saturation [21]. Erefore, in this paper, a compound control based on active disturbance rejection control (ADRC) scheme and slide mode control (SMC) is designed to achieve attitude tracking for the spacecraft system. E main contribution of this paper compared to others is that the proposed scheme can achieve reliability against inertia matrix uncertainties, external disturbances, actuators faults, and saturation.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
