FPGA-based highly-integrated high-precision control system for micro flywheel

Abstract

The invention discloses an FPGA-based highly-integrated high-precision control system for a micro flywheel, which mainly comprises a direct current power supply, a digital controller, an integrated three-phase bridge drive chip, a permanent magnet brushless direct current motor, a direct current detecting device and a position detecting device. The system takes an FPGA chip which has high reliability and is operated in parallel as a controller, and realizes sequential logic functions of a digital calculating unit, PID control, phase conversion logic, PWM, RS232 serial port communication, rotating speed measurement and A/D sampling trigger of a current and the like on an FPGA through a VHDL language. Compared with other special integrated digital processors, the system has the advantages of programming flexibility, high program reliability and good real-time. Hardware circuits of the invention are highly integrated, which integrates a three-phase full-bridge inverter and a drive circuit thereof in the integrated three-phase bridge drive chip so as to realize highly-integrated high-precision steady-speed control of a brushless direct current motor used for the micro flywheel.

Description

technical field [0001] The invention relates to an FPGA-based micro-flywheel high-integration high-precision control system, which is used for high-precision control of micro-flywheel permanent magnet brushless DC motors, and is especially suitable for high reliability and high precision of driving components of micro-satellite attitude control actuators , Low power consumption control. Background technique [0002] With the development of space technology, micro-nano satellite technology has become the most active and challenging space technology. The tiny flywheel is the core actuator of the high-precision attitude stabilization control system of the micro-nano satellite. The micro flywheel and its control system have the characteristics of integration, light weight, complex structure and small size. Improving the integration and control accuracy of the micro flywheel control system has become an important indicator of system control. [0003] The control of tiny flywhee...

AI Technical Summary

Problems solved by technology

The single-chip microcomputer is slow in algorithm implementation and cannot meet the requirements of high-speed real-time control

Although DSP is fast in algorithm implementation, the peripheral circuit is more complicated, and it is difficult to meet the miniaturization requirements of the tiny flywheel circuit.

And because the DSP chip adopts the interrupt working mode, there is a certain lag in signal processing and transmission, which affects the accuracy of motor control.

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