Special test and evaluation methods used for a nine-axis accelerometer

TL;DRAbstract

The test methods used to characterize and evaluate the performance of a minia- ture nine-axis accelerometer are discussed. A special transducer containing nine separate linear accelerometers was examined. The intended application for this type of device is to derive angular acceleration data for dynamic-head motion measurements relating to automobile crash studies. The accelerometers, amplifiers, multiplexer, FM telemetry transmitter, and power supply are all to be molded into an athletic orthodontic mouthpiece and data will be obtained from measurements taken from boxer's head motions. The angular head motions of boxers is thought to be similar to those in automobile crashes. The trans- ducer parameters tested include axial and transverse linear-vibration sensitiv- ities, equivalent acceleration noise, effects of power supply voltage variations, and mouthpiece vibration transmissibility. Special test apparatus described includes a dual centrifuge and a dual spin-axis rate-table. Test

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