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本文介绍了振动时效（ＶＳＲ）技术原理和采用双闭环数字锁相调速系统，用于ＶＳＲ技术的机械式激振器直流电机调速单元，显著提高了在强烈振动状态下，具有谐振型负荷的直流电机的稳频精度，其精度在０．１Ｈｚ以上。
In this paper, the principle of VSR and the double closed-loop digital phase-locked speed control system are introduced. The mechanical exciter DC motor speed-adjusting unit for VSR technology is improved greatly. In the condition of strong vibration, resonant load The DC motor frequency stabilization accuracy of its accuracy above 0.1Hz.