Design of a new Butterworth lower-pass filter

摘要

The experimental environment of ground testing system of space robot is very complicated.The signal of tense sensor is suffered many electromagnetic disturbances.Butterworth filter is with maximum flat amplitude-frequency.It is also with good linear phase characteristic and has been widely used.However,Butterworth lower-pass filter contradicts with each other in stability,responding time and accuracy.To attain best global performance,a new filter is proposed in this paper.The new filter resets the key peak points to meet the practical requirements.Experimental results show that the new filter meet the requirement of experimental system.