Low-frequency sensitive force-balance linear standard accelerometer

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Low-frequency sensitive force-balance linear standard accelerometer

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© The Institution of Electrical Engineers
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An accelerometer based on an automatic force-balance principle has been developed with a view to measuring linear acceleration from 0.01 to 1.0 g, with overall accuracy of 0.1% under static as well as dynamic conditions in the frequency range from 0 to 70 Hz. The analysis of errors of components of various blocks and its experimental verification, the exact determination of damping ratio, and the phenomenon of reduction of undamped natural frequency arising out of the so called ‘piston effect’, caused by the highly viscous damping fluid, are some of the highlights in the determination of the performance. Finally, it is concluded that this linear accelerometer, using a new technique of calibration and an accurate measuring device, can be considered as a standard accelerometer.

Inspec keywords: accelerometers; measurement standards; calibration

Other keywords: linear acceleration measurement; calibration; measurement standard; analysis of errors; damping ratio; reduction of undamped natural frequency; force-balance linear standard accelerometer; piston effect; 0.01 to 1.0 g; 0 to 70 Hz

Subjects: Measurement standards and calibration; Measurement standards and calibration; Velocity, acceleration and rotation measurement; Velocity, acceleration and rotation measurement; Sensing devices and transducers

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