Fuzzy control tests of arc voltage and short-circuit frequency are conducted to improve welding quality.
采用模糊控制技术，实现了电弧电压或短路频率的控制，提高了焊接质量。
2
The paper studies the hardware of the interface circuit and how to control the sweep fingerprint sensor to complete the task of high quality fingerprint gathering with hardware language VHDL.
The final analysis proved that a phase-shifting surge SPWM optimal control of the inverter, a simple controlcircuit, in the phase shift smaller, better quality waveform.