A High-precision Servo Control Method for Throttle
With the upgrading and replacement of drones,the accuracy of throttle control for autonomous driving is constantly improving.This paper designed a signal filtering algorithm and PID control algorithm to achieve high-precision servo control of drone throttle lever.This design used a 16 bit high-precision Hall sensor,which collected sensor signals through a 16 bit A/D converter.A 4th order IIR filter was used to fil-ter the signal,achieving stable output of 16 bit resolution data at any position of the throttle lever,which was sent to the upper computer through the RS422 interface.In the follow-up mode,this design adopted PID control algorithm,combined with stepper motor and multi-stage reduction gear group,to achieve high-preci-sion follow-up of the throttle lever,with a follow-up accuracy of 0.2 °.It has been tested and verified on a certain model of unmanned aerial vehicle.
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