文档介绍：of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres hf accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work, enhance leaders ability to resist
of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work, enhance leaders ability to resist
分析：利用机械原理和放大器原理求解放大系数，然后求解电动机的传递函数，从而画出系统结构图，求出系统的传递函数。
解：（1）
（2）假设电动机时间常数为Tm，忽略电枢电感的影响，可得直流电动机的传递函数为
式中Km为电动机的传递系数，单位为。
又设测速发电机的斜率为，则其传递函数为
由此可画出系统的结构图如下：
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-
（3）简化后可得系统的传递函数为
2-9 若某系统在阶跃输入r(t)=1(t)时，零初始条件下的输出 响应，试求系统的传递函数和脉冲响应。
分析：利用拉普拉斯变换将输入和输出的时间域表示变成频域表示，进而求解出系统的传递函数，然后对传递函数进行反变换求出系统的脉冲响应函数。
解：（1），则系统的传递函数
（2）系统的脉冲响应
2-10 试简化图2-9中的系统结构图，并求传递函数C(s)/R(s )和C(s)/N(s)。
of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work, enhance leaders ability to resist
of accountability, redress of orders and prohibitions. Strengthening the honesty and self-discipline of leading cadres honesty in politics and education work, enhance leaders ability to resist
of accountability, redress of orders and proh