机械移相器驱动系统快速定位控制方法OA

[Background]A mechanical phase shifter can withstand gigawatt-level instantaneous power and therefore still play an important role in the field of high-power microwaves.Due to limitations in mechanical structure and motor performance,current high-power mechanical phase shifter faces a conflict between rapid response and precise positioning.[Purpose]This study proposes a drive solution that integrates precision mechanical transmission with advanced control algorithms to achieve rapid and accurate positioning.[Method]The hardware system employs a BLDC motor as the primary drive unit,combined with a high-precision screw-nut transmission mechanism with a 2 mm lead.This setup efficiently converts the motor's rotational motion into precise linear displacement of a short-stroke piston,enabling continuous adjustment of the electromagnetic-wave phase.The control system,built on a high-performance ARM processor,adopts a position-velocity-current triple-loop coordinated control architecture.By incorporating adaptive velocity feedforward compensation and an optimal trajectory planning algorithm,it effectively suppresses nonlinear friction and inertial lag in the transmission process,significantly improving dynamic response performance.[Results]The system reaches the 0°-360° target position within 0.083 s with an accuracy of±0.78°.Owing to the oscillatory characteristics of the motor,the position continues to converge slowly,and the maximum residual error is reduced to 0.21° at 0.09 s.[Conclusion]The drive system achieves full-stroke precise positioning within 0.09 s and enables continuous phase adjustment from 0° to 360°,with positioning errors controlled within±0.78°.The system exhibits fast response,high positioning accuracy,and strong robustness,providing an effective technical solution for the engineering application of high-power phase shifter.