The paper is begun with analyzing the oscillatory condition A·F·>1, and the oscillatory frequency is worked out based on the phase balance condition  A+ F=2nπ.

If we introduce the ladder-shaped circuit simple in good time,the oscillating frequency and oscillating condition of RC phase shift oscillating can be w.

Theoretical research on equivalent diameter and oscillation frequency of miniature regenerator;

The oscillation frequency only was the function of oscillating tube length, not influenced by the spliter.

Based on Matlab image processing tool,this paper provides a new method of getting the flame oscillation frequency by applying fast Fourier transform to time variation of image correlation coefficients of a continuous image sequences.

By analyzing the relation between the self oscillation frequency and the system frequency response, the relation between the precision of the harmonic linearization and the frequency ratio of the input signal and self oscillation signal, a method to design the self oscillation frequency is brought forward.