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   与单速度环双马达驱动系统一样，力矩偏置信号的引入仍然会引起动态运行状态下的两个马达之间的差速振荡，但对双速度环来说，*采取其他措施便可以起到抑制差速振荡的作用。因为不论系统处于何种状态下，两个速度环是独立的，速度指令Ugv1总是与取自测速机TG1的反馈信号Ufv1相比较构成速度闭环，力图使Ufv1的幅值与Ugv1的幅值相等。同样，速度指令Ugv2总是与取自测速机TG2的反馈信号Ufv2形成另外的速度闭环，力图使Ufv2幅值与Ugv2的幅值相等；而两个速度环的输入指令Ugv1，Ugv2的幅值总是相等的，所以两个独立的速度环调节的结果使得两速度反馈信号Ufv1和Ufv2的幅值尽量相等，而Ufv1和Ufv2又与各自相对应的马达转速成正比。

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