Accession Number : AD0012914


Title :   DEVELOPMENT OF AN INDUCTANCE TYPE ACCELEROMETER FOR USE IN A FREQUENCY MODULATED RECORDING SYSTEM


Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD


Personal Author(s) : Sussholz, Benjamin


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/012914.pdf


Report Date : 24 Feb 1953


Pagination or Media Count : 38


Abstract : The development, characteristics, and calibration of an inductance type accelerometer is described. The mechanical features of this accelerometer are characterized by a mass unit suspended by a double cantilever-beam spring system. An excursion of this mass unit changes to gap spacing of a Mu Metal pad relative to an E coil. The resulting change in reluctance of the magnetic circuit produces an inductance element in the tank circuit of an FM oscillator. An acceleration of the mass unit results in an FM of the carrier frequency of the FM system. Accelerometers were produced with the following characteristics: a range of 0.1 to 38 g, a damping of 0.5 to 0.7 critical, a frequency shift of + or - 7.5% at full range, and an accuracy of better than 5%. Calibration techniques include the use of a tilt table spin table, and shake table.


Descriptors :   *ACCELEROMETERS , MAGNETIC CIRCUITS , MECHANICAL PROPERTIES , ACCELERATION , MASS , FREQUENCY MODULATION , DAMPING , ACCURACY , TABLES(DATA) , SPINNING(MOTION) , CALIBRATION , CIRCUITS , INDUCTANCE , TILT , CARRIER FREQUENCIES , FREQUENCY SHIFT , SHAKING , OSCILLATORS , COILS


Subject Categories : Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE