Engine Torsional Transducer Comparison

The torsional measurement capabilities of both an angular accelerometer and a toothed wheel - magnetic pickup were compared against the requirements for measuring generator set torsional motions accurately enough for an analytical model to predict operating shaft torques within ten percent. Three generator sets were evaluated, ranging in size from 4KW to 1250KW. If properly applied, both torsional measurement systems offered sufficient measurement accuracy. However, the angular accelerometer was preferred over the toothed wheel, since, unbeknownst to the user, the toothed wheel's signal could be significantly altered by the engine's linear shaking.