Digital control system for satellite aerial directing mechanism

Abstract

The invention discloses a digital control system for a satellite aerial directing mechanism which is applied to driving and controlling a novel high-precision reliable satellite aerial directing mechanism. The system comprises a digital signal processor (DSP), a synchronous machine, a rotary transformer, a Hall effect rotor position sensor, an exciting output circuit, an axial angle decoder circuit, a three-phase bridge type power module, a PWM driving circuit, a three-phase winding current detecting circuit, a communication module circuit, a secondary power supply transfer circuit, and a protection circuit. The system can realize the high-precision control for the satellite aerial directing mechanism by the upper computer communication, the output shaft position detection, the winding current detection, the motor rotor position detection and a series of control methods.

Description

technical field [0001] The invention relates to a digital control system of a satellite antenna pointing mechanism. The system has the advantages of high integration, small volume, low power consumption and high reliability, and is suitable for high-precision pointing control of satellite antennas. Background technique [0002] The pointing mechanism is the motion actuator of the satellite antenna, which plays an important role in the whole star system. At present, with the development of my country's large-scale communication satellite and relay satellite technology, higher requirements are put forward for the accuracy, life and reliability of the digital control system of the satellite antenna pointing mechanism. Therefore, it is imminent to design a digital control system for pointing mechanism with high precision, high integration and high reliability. Many domestic units have carried out many beneficial explorations on the development of pointing mechanism technology, ...

AI Technical Summary

Problems solved by technology

At present, the existing control system is based on single-chip microcomputer, but due to the low operation rate and small number of calculation bits of single-chip microcomputer, the functions that can be realized are very limited, and it is more and more difficult to meet the development requirements of the future pointing mechanism control system.

However, the digital control system based on DSP+FPGA, because of the addition of control chips, configuration chips and a large number of memory chips, the reliability of the system is reduced and the power consumption of the system is also increased.

Single-chip FPGA is generally suitable for the construction of control logic, but its computing power is very limited, making it difficult to realize complex operations

Moreover, the existing digital controller can only be used as a motor-driven controller, and also requires a special position detection module and chip, and cannot achieve the integration of position detection sensors and controllers.

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