确定条件稳定系统K值范围的新方法

THE NEW WAY OF DETERMINE K VALUE RANGE OF THE CONDITIONAL STABLE SYSTEM

应用对数频率稳定判据说明条件稳定系统开环增益处于临界值之间时系统是稳定的，而开环增益取足够大或足够小时系统是不稳定的。

A conditionally stable system is stable when the value of open loop gain lies in the range of critical values, but it is unstable if the open loop gain is either increased or decreased sufficiently. A new way which determines the value range of the open loop gain by using Nyquist stability criterion is presented.