Measurement of angular-vibrations parameters
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The equipment produced by us has the following characteristics: operating frequency range of 5–200 Hz; maximum oscillations amplitude of 5·10−4 rad for the upper limit of the frequency range, and of 10−2 rad for the lower limit; an error not exceeding 2% in measuring amplitudes which do not fall below 5·10−4 rad; and a nonlinear distortion coefficient not exceeding 1%.
The equipment is designed to produce a uniform rotation superposed by angular oscillations, thus reproducing the actual operating conditions of a torsiometer.
The method of a torsion pendulum with an electrodynamic drive serves to reproduce angular oscillations over a considerably larger frequency range than it is possible to attain by other methods. Moreover, this method produces the smallest nonlinear distortion coefficient.
The motor drive eliminates various difficulties related to the design and manufacture of an electrodynamic drive.
The equipment can be used as a reference instrument for testing and investigating torsiometers with moments of inertia up to 5·10−3 kg·m2. It can also be used as a basis for developing test racks.
KeywordsPhysical Chemistry Analytical Chemistry Lower Limit Actual Operating Oscillation Amplitude
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