rheonomic constraint

• 不稳定约束,非定常约束

rheonomic constraint的用法和样例：

例句

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