虚拟轴数控机床的各伺服驱动回路由于轴间强耦合的影响，在国内外，一直是控制理论和实现技术方面的一个难题。
Servo-drive of virtual-axis machine is always a problem in control theory and application technology because it has strong coupling.
虚拟轴数控机床的各伺服驱动回路由于轴间强耦合的影响，在国内外，一直是控制理论和实现技术方面的一个难题。
Servo-drive of virtual-axis machine is always a problem in control theory and application technology because it has strong coupling.
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