介绍了兰州重离子研究装置(HIRFL)主回旋加速器(SSC)高频系统高频电压的相位稳定与幅度稳定系统,重点介绍了设备的组成和稳定环路设计以及正交变换与稳定环路滤波器的设计方法。通过在SSC腔体上进行的长期的现场测试,得到了调制抑制度与长期稳定度的测试方法,并对结果进行了分析。其中,设备的长期相位稳定度达到0.014°,长期幅度稳定度达到1.29×10-4,远高于改造前的指标。 The phase stability and amplitude stability of the high frequency voltage of the high frequency system of the main cyclotron (SSC) of Lanzhou Heavy Ion Research Facility (HIRFL) are introduced. The composition of the device, the design of the stability loop, the orthogonal transformation and the stability of the loop filter The design of the device. Through the long-term field test conducted on the SSC cavity, the test method of modulation suppression and long-term stability was obtained, and the results were analyzed. Among them, the long-term phase stability of equipment reached 0.014 °, long-term amplitude stability reached 1.29 × 10-4, much higher than the indicators before transformation.