用最小势能原理得到控制微分方程组，采用状态空间法将微分方程化为状态方程。
Utilizing principle of potential energy to obtain governing differential equations, to turn differential equations into state equations by means of state space method.
用最小势能原理得到控制微分方程组，采用状态空间法将微分方程化为状态方程。
Utilizing principle of potential energy to obtain governing differential equations, to turn differential equations into state equations by means of state space method.
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