Design of Motion Controller for Satellite-Borne Data Transmission Antenna

Abstract

In order to realize stable, reliable, and high-precision motion control of the satellite-borne data transmission antenna, a FPGAbased motion controller is designed and achieved. The controller receives commands through the RS-422 asynchronous transmission serial port and performs speed planning autonomously. The controller also performs closed-loop position control with the collected resolver angle and controls two antennas synchronously or independently in a subdivision driving method. The controller is firstly designed using the hardware description language VHDL, simulated in ModelSim software. Then, it is connected to the stepping motors through the LMD18200H bridge chip by using aerospace-grade FPGA, controlling the data transmission antennas to regulate the angle, go to zero-position, or stop rotation. The simulation and experiment results show that the design can control the antennas accurately and stably. The accuracy of angle regulation reaches 0.0085°under the condition of 64 subdivisions and 100 : 1 reduction ratio.

Enhanced Antenna Positioning Control System Using Adapted DC Servo Motor and Fuzzy-PI Controller

“…Utilizing the Particle Swarm Optimization (PSO) algorithm due to its ease of use and rapid convergence to optimal values, the design and tuning of the PID controller for brushed DC motors has been used to develop low-cost robotic applications [6], [28], [29]. The beginning was in laboratory experiments, choosing a DC servo motor, and building a control system on an antenna [30], [31]. Targeting a reduction in sprocket torque and an increase in generated torque, it is used to improve the permanent magnet motor, a critical technology Thus, data availability is highly dependent on the operation of the ground station control unit, which will be simulated and annotated [31].…”

“…The beginning was in laboratory experiments, choosing a DC servo motor, and building a control system on an antenna [30], [31]. Targeting a reduction in sprocket torque and an increase in generated torque, it is used to improve the permanent magnet motor, a critical technology Thus, data availability is highly dependent on the operation of the ground station control unit, which will be simulated and annotated [31].…”

Analysis and Experimental Study on Dynamic Behavior of Stepper-Actuated Dual-Axis Data Transmission Antenna

“…This phenomenon not only affects the resolution and pointing accuracy of payloads such as cameras but also affects the attitude control of satellites [6]. The spaceborne data transmission antenna plays an important role in spacecraft data relay and intersatellite link tasks, but it is also the main source of low-frequency microvibration [7][8][9].…”

“…Most researchers take the pointing accuracy of data transmission antenna as the design goal [9] and model from the stepping motor and the control method. Liu et al analyzed the influencing factors of the pointing accuracy of the data transmission antenna from the aspects of pointing algorithm, pointing execution, ground station pointing, and atmospheric transmission [17].…”