In this paper a new concept of phase contrail of phase plane for higher order nonlinear control system based on isoclines method of second-order linear system is proposed.
提了基于二阶线性系统等倾线法绘制相平面原理，实现了高阶非线性控制系统相平面相轨迹的作图算法。
In order to obtain the phase plane of higher order nonlinear control system, a new graphic method of phase locus of phase plane for higher order nonlinear.
为得到高阶非线性系统的相平面，借助状态空间法，提出一种利用图解方法实现高阶非线性系统相轨迹的作图方法。
After the parameters in control law is analyzed by Phase-Plane method, other questions including optimal control, compensation of storage time are also discussed.
用相平面法对谐振参数变化规律进行了分析，讨论了参数的最佳控制、开关器件的贮存时间补偿等问题。
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