Classical control theory is based on input - output relationships, principally the transfer functions.

传统的控制理论的基础是输入 - 输出关系, 主要是传递函数.

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Classical control and modem control theory are based on strict and exact mathematics model.

经典控制理论和现代控制理论都建立在严格和精确的数学模型基础之上.

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Thus the dependence to strict model of the system restricts the application of classical control.

因而,对精确数学模型的依赖性使传统控制理论的应用受到很大的限制.

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