By applying the structure invariant theory in the control strategy, the feedforward-feedback control theory is applied in the control system design to reduce the redundant force.

论文从控制系统的结构方面，利用结构不变性原理，针对位置扰动设计专门的前馈补偿控制器，减小位置扰动的影响。

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The invariant conditions of the stabilized platform control system for variable structure control were verified and a sliding mode was constructed.

验证了稳定平台控制系统对于变结构控制的不变性条件，构造了滑动模态。

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For integer ratio conversion, the filters would be time-invariant, but for fractional ratio conversion, the filters would be time-variant whose structure is more complex.

实现整数倍采样率转换可以采用时不变滤波器，然而实现分数倍采样率转换一般需要采用较复杂的时变滤波器。

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The loop invariant what does the loop invariant mean? It says, here is a property that is true of this structure every time through the loop.

循环不变量是什么意思？,它是一个在结构体中,每次循环都为真的属性。

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