(3)
初始条件
解：
(4)
初始条件
解：
5. 一阶微分方程组为
已知，求解
解：
6. 已知一液压控制系统的运动方程为
式中参数：在单位阶跃输入
作用下，系统的输出
。已知
。试求
解：
7. An electric circuit is shown in Fig. P2.1. Obtain a set of simultaneous integrodifferential equations representing the network.
8. A dynamic vibration absorber is shown in Fig. P2.2. This system is representative of many situations involving the vibration of machines containing unbalanced components. The parameters M2 and k12 may be chosen so that the main mass M1 does not vibrate in the steady-state when Obtain the differential equations describing the system.
.
For mass 1
the differential equations:
is
