Development of a transducer for active vibration isolation using translational and rotational power transmission as a cost function

When conducting active vibration control experiments it is often necessary to omit the measurements of the contribution of power transmission due to rotational moments because of the lack of suitable transducers. Here, a transducer is described which can be used to measure the translational and rotational power transmission from a source to a receiving structure. A description of the procedure used to calibrate the device is also included. The results from the calibration show that whilst the amplitude of the forces, moments, translational, and rotational displacements can be measured accurately, it is the phase accuracy of these measurements that limit the accuracy of measurements of power transmission.