Most vibration sensors available can not meet the requiremeet of ultra-low frequency measurement.Thus

It is necessary to expand their operation bandwidth.The usefulness of zero-pole redisposing in model 941B vibration sensor is investigated.The method can expand the operation bandwidth of a vibration sensors and especially enhanced the low frequency characteristics.The bandwidth is suceessfully improved from 0.7～105 Hz to 0.08～109 Hz.The MATLAB simutation shows that response to single half sine wave and a superposing signal of three different frequency has been significantly improved after the compensation.