应用比例型控制器的自动电平调节系统(即有静差系统),其开环传递系数一般都在20以上‘但是由于电源电压的限制,控制器输出电平的变化范围总是有限的。因而使得控制器的输入电平线性变化范围很小。系统在稍大的输入电平阶跃扰动时,整个系统必然会进入非线性区工作。例如一般地说来,当有1dB的扰动时,就已进入非线性工作状态。然而2dB The application of proportional-type controller, automatic level adjustment system (ie, a static system), the open-loop transfer coefficient are generally more than 20 ’However, due to supply voltage limits, the controller output level range is always limited. Thus making the input range of the controller linear change is very small. When the system is disturbed slightly by the input level step, the whole system will inevitably enter the non-linear region. For example, in general, when there is a disturbance of 1 dB, it has entered a non-linear working state. However 2dB