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A mechanically controlled oscillator
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DOI：10.1016/S0924-4247(99)00325-8.png)
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Abstract
En 中文
The theory, realization, characterization, and application of a mechanically controlled oscillator is presented in this paper. The control is accomplished by a mechanical impact, which occurs at stoppers placed at a certain amplitude of oscillation. In the mechanically controlled operation mode, the oscillation amplitude is defined by these stoppers. With properly designed devices, in spite of the mechanical impact, the oscillation is harmonic and occurs at the frequency of the driving force. Higher harmonics are not detectable. The distinguishing marks are that without any electronic control loops, a high stability of the amplitude and phase vs. temperature is achieved. Since the oscillator is driven with constant amplitude and frequency and the detection of the oscillation is necessary only to prove that the oscillator is working, the required electronics is reduced to a minimum. Based on the mechanically controlled oscillator, the micromachined Coriolis Vibratory Gyroscope DAVED(R) has been developed. It shows a bias stability less than 0.1 degrees/s over the temperature range of 25-100 degrees C. (C) 2000 Elsevier Science S.A. All rights reserved.
Keywords:
oscillator
nonlinear mechanics
stoppers
gyroscope
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