TESTS ON A LOW-FREQUENCY INVERTED PENDULUM SYSTEM

This paper reports the performance and mechanical properties of an inv erted pendulum as a vibration isolator. The advantages of such a syste m for vibration isolation in an interferometric gravitational wave det ector is demonstrated through modelling of the isolator's response. An experimental investigation using a prototype inverted pendulum was al so performed where the behaviour of the stability, resonant frequency and Q factor with varying load mass was examined. The pendulum was als o used as a seismometer to examine low-frequency seismic activity.