Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变换方程与约
方程显含时间的等价性，提出了定常约与定常系统判据的等同表述。
恒的,与时间有关的Starting with Lagrange equations of the first kind, pure differential equations of multibody systems with rheonomic constraints are established.
根据变换方程与约方程显含时间的等价性，提出了定常约与定常系统判据的等同表述。
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