MRAC-Based Quantized Spacecraft Attitude Takeover Control

In this paper, a model reference adaptive control (MRAC) algorithm is developed to address the challenge of attitude takeover control for space debris, such as failed satellites. To tackle the issue of frequent wireless network communication caused by the need for a single controller micro satellite to transmit identical control commands simultaneously to multiple actuator micro satellites, a hysteretic quantizer is employed to encode the control torque signals, thereby reducing communication load while maintaining sufficient control accuracy for mission requirements. The reference model control law is derived by using the Lyapunov stability theory, ensuring system stability and control performance. A hyperbolic tangent function is incorporated into the control law to effectively eliminate chattering. Furthermore, an adaptive algorithm is introduced to compensate for dynamic uncertainties, quantization errors, and external disturbances, with its robustness and effectiveness validated through the section of numerical simulation.