To control the distance between the side scan sonar and the seabed, a permanent magnet synchronous machine(PMSM) servo system is designed,and the overall structure of the system and the design scheme of each part are presented.The maximum torque per ampere(MTPA) vector control method is adopted to enhance the pow-er factor and dynamic performances of the system, and based on MTPA vector control method, according to the harmful effects of the dynamic load in the servo control of sonar,the sliding mode variable structure(SMVS) vector control method is proposed,and the robustness of the servo system is effectively improved. The mechanism of the MTPA and SMVS vector control method is demonstrated in detail,and their effectiveness is verified.%为了控制侧扫声呐距离海底的高度,设计了永磁同步电机(PMSM)伺服系统,给出了系统的总体结构及各部分的设计方案.采用了最大转矩电流比(MTPA)矢量控制方法,以提高系统的功率因数及动态性能,在此基础之上,针对声呐伺服控制中动载带来的不利影响,提出了滑模变结构(SMVS)矢量控制方法,有效改善了系统的鲁棒性.详细阐述了MTPA以及SMVS矢量控制方法的机理,并对其有效性进行了验证.
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