The two laser beam system has been used to measure the relative density of linen dust, with the feature of wide measurement range, good sensitivity and restraining the intensity fluctuationnoise.
In electronics, a circuit for converting AC voltage to low voltage DC in such a way that the output is regulated to minimize noise and voltage fluctuation.
But its major disadvantages are the big vibration caused by torque moment fluctuation, which leads to high noise, and further affects the comfortableness and smoothness of automobiles.