Accession Number:

AD0659114

Title:

VARIABLE INDUCTANCE ROLL ACCELEROMETER,

Descriptive Note:

Corporate Author:

NEW MEXICO STATE UNIV UNIVERSITY PARK PHYSICAL SCIENCE LAB

Personal Author(s):

Report Date:

1948-03-31

Pagination or Media Count:

29.0

Abstract:

The report is concerned with the design, construction and calibration of a variable inductance type of end instrument for measuring angular accelerations in the range 0-400 radsec2. The main feature of the instrument is a rigid dynamically balanced beam torsion mounted at its center in such a way as to limit its motion to essentially one degree of rotational freedom. Deflection of the beam, which is directly proportional to the angular acceleration it experiences, varies the spacing between a high permeability armature and core of an inductance unit. This change in inductance introduces a change in frequency of the audio oscillator of which the inductance unit is a part. The oscillator frequency, in reference to that when the beam is in its rest position, is then a measure of the angular acceleration. Calibration has been accomplished through the use of a torsion pendulum designed and constructed for the purpose. Maximum angular accelerations employed in the calibration are computed from the amplitude and natural frequency of the pendulum. The corresponding oscillator frequencies are measured by conventional methods. Motion of the pendulum is maintained at constant amplitude by properly timed condenser discharges through two sets of driving coils. Author

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE