Modelling of Antenna Control Servo System Using Simscape

The basic purpose of an antenna is to track various frequency range signals and to communicate with the communication satellites to send or receive information. ACSS is used for tracking low earth orbit satellites and can be modelled in many ways. For accurate tracking, the antenna should be synchronous with the satellite, and feedback control is required for precision control. Simulink is used for modelling feedback control, whereas Simscape is for plant modelling which involves link dynamics. ACSS uses individual servo control for each axis and incorporates independent control of two axes of antenna mechanism. The link dynamics is modelled by taking kinematics, dynamics, and the effect of gravity into consideration. A single-axis servo control system (SASCS) is developed, followed by the dual axis servo control system and simulated for various signal trajectories. Results indicate that the rigid link closely follows the desired position, thereby confirming the validity of the proposed model.