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Instaspin-MOTION 单位的问题



最近几天一直在看Instaspin-MOTION,有个地方不清楚:一般的单位是pu/s,比如ST_VelCtl_t.VelRef的单位就是pu/s, 但是ST_VelCtl_t.Inertia的单位 PU/(pu/s),前面大写的PU是什么意思呢?