Self-excited oscillator introduction
The self-excited oscillator is a feedback control system. If the closed-loop pole of the system has a pair of conjugate poles located in the right half plane of S, its impulse response will produce a sinusoidal wave whose magnitude increases exponentially. In theory, the amplitude of the oscillation will increase indefinitely. However, due to the nonlinear action of the internal components of the system, the increasing oscillation causes the internal parameters of the system to change automatically, so that the conjugate pole located in the right half plane of S is finally moved to the jω axis, and the sinusoidal wave is stabilized before the amplitude. .