关键词: 复合控制, 熔透, 线能量, 出口流道, 空化特性, 雷诺数, 脉动压力, 雾化喷嘴, 自激振荡脉冲效应

Abstract: The idea of dynamic energy equilibrium of the molten pool from essence of penetration control is put forward in order to maintain stable pool shape. The heat output change of pool, regarded as a interference variable, is compensated in former-feedback method because of diversification of workpiece heat conduction, in the meantime, the temperature of the whole workpiece is considered as a feedback variable, so the combined control system is composed of the feedforward back and feedback. The experimental results show that control approach is progressed.

Key words: Combined control, Heat input, Penetration, atomization nozzle, cavitation characteristics, fluctuating pressure, outlet channel, Reynolds number, self-excited oscillating pulse effect