基于无位置变载波频率的深海矢量推进电机控制方法

Control Method of Deep-Sea Vector Propulsion Motors Based on Position-Sensorless and Variable Carrier Frequency

为了提高矢量推进电机在深海探索中的稳定性与隐身性,文中以表贴式永磁同步电机为基础,结合周期扩频调制技术和改进型滑模观测器无位置控制技术,提出了基于无位置变载波频率的深海矢量推进电机控制方法。通过电机变载波频率、电机起动变速和负载突变仿真实验,验证所提控制方法的控制效果,结果表明所研究控制方法转速估算准确,对转速有良好的动态跟踪性能,额定转速工况下转速估算误差率仅为0.32%,0.5倍额定转速工况下转速估算误差率仅为0.09%,且具有明显的高频谐波扩频抑制效果和良好的动态抗干扰性能。结合减少位置传感器带来的电机结构简化效果,文中提出的控制方法可有效降低深海矢量推进电机作业时的故障率,减少易被探测的高次固定频率谐波,提高了深海矢量推进电机的可靠性与隐身性,为深海UUV提供高效可靠的动力保障。

In order to improve the stability and stealth of vector propulsion motors in deep-sea exploration,a control method of deep-sea vector propulsion motors based on the position-sensorless and variable carrier frequency was derived from surfacemounted permanent magnet synchronous motors by using periodic spread spectrum modulation technology and positionsensorless control technology of improved sliding mode observer.Through simulations of motors’variable carrier frequency,motor start-up speed variation,and sudden load change,the control effects of the proposed method were analyzed.The simulation results show that the rotation speed estimation of the studied control method is accurate,and the method has good dynamic tracking performance for rotation speed.The estimation error rate at the rated rotation speed is only 0.32%,and the estimation error rate at 0.5 times the rated rotation speed is only 0.09%.In addition,the proposed control method has an obvious high frequency harmonic spread spectrum suppression effect and good dynamic anti-interference performance.Combined with the simplification effect of reducing the motor structure brought by the position sensor,the control method proposed in this paper can effectively lower the failure rate of the deep-sea vector propulsion motor during operation,reduce the high-order fixed frequency harmonics that are easy to be detected,improve the reliability and stealth of the deep-sea vector propulsion motor,and provide efficient and reliable power guarantee for deep-sea unmanned undersea vehicles.