Title: ACCELERATION AND VIBRATION SENSING TECHNIQUE
Abstract: This chapter discusses acceleration- and vibration-sensing technique. The instruments used for the measurement of vibrations exist in many forms. Nearly all, however, can be classified into two groups: (1) relative and (2) absolute vibration instruments. In flight test instrumentation, absolute vibration instruments have two important applications: (1) measurement of structural vibration and shock and (2) measurement of aircraft acceleration. The chapter also highlights the calibration methods. Static calibrations of relative displacement meters can be made against a micrometer of suitable accuracy and range. Absolute displacement meters have zero static sensitivity. Static calibration of accelerometers can be accomplished in two ways: (1) in the range between −1g and +1g, they can be calibrated by changing the angle between the working line and the vertical and (2) for higher accelerations, a whirling arm is used, on which the instrument is subjected to a centrifugal acceleration determined from the speed of rotation and the radius at which the instrument mass is placed.
Publication Year: 1959
Publication Date: 1959-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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