Composite Anti-Disturbance Dynamic Regulation for Systems With Multiple Disturbances: From Stability to Balance

Multiple disturbances widely exist in practical complex control systems, which may destroy traditional system stability with zero equilibrium point (e.g., the asymptotical stability). How to establish a new balance mechanism for control systems in the presence of multiple disturbances needs to be investigated. This paper proposes a kind of composite anti-disturbance dynamic regulation (CADDR) method for the first time, and an example of attitude control system of spacecraft is given to show the application of CADDR. Firstly, the deep-coupling model with multiple disturbances is established, followed by disturbance estimability analysis and disturbance estimation method design. Secondly, a novel CADDR method is proposed to achieve dynamic balance of the system with unknown and time-varying non-zero equilibrium point, where disturbance absorption, compensation and attenuation can be accomplished simultaneously. The proposed CADDR can be regarded as one “green” control technique from the viewpoint of energy consumption. Finally, simulation results are given to verify the effectiveness of the proposed methods.