Mechanical oscillator control electronics
First Claim
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1. A mechanical oscillator control system comprising:
- a first phase locked loop connected to a mechanical oscillator pick off; and
a second phase locked loop connected to an output of the first phase locked loop;
wherein the second phase locked loop may output a sinusoidal wave signal having a fractional multiple frequency of a signal from the mechanical oscillator motor pick off;
a demodulator connected to a mechanical oscillator sense pick off; and
a switch connected to an output of the second phase locked loop and to a drive input of the mechanical oscillator.
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Abstract
A control system for a mechanical oscillator having a sinusoidal drive signal with a frequency that is a fractional multiple of a frequency of a signal of the mechanical oscillator. The drive signal may be in phase and in registration with the signal from the mechanical oscillator. A sense signal may be picked off from the oscillator and be demodulated to obtain a parameter sensed by the oscillator. The drive signal to the oscillator may be selected or blanked out while receiving and demodulating the sense signal.
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Citations
20 Claims
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1. A mechanical oscillator control system comprising:
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a first phase locked loop connected to a mechanical oscillator pick off; and a second phase locked loop connected to an output of the first phase locked loop; wherein the second phase locked loop may output a sinusoidal wave signal having a fractional multiple frequency of a signal from the mechanical oscillator motor pick off; a demodulator connected to a mechanical oscillator sense pick off; and a switch connected to an output of the second phase locked loop and to a drive input of the mechanical oscillator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for sinusoidal mechanical oscillator control comprising:
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picking off a first signal having a first frequency from a mechanical oscillator; providing a second signal having a second frequency that is a fraction of the first frequency, and is phase locked to the first signal; providing sinusoidal wave signal that is phase locked to the second signal; providing the sinusoidal wave signal to a drive input of the mechanical oscillator; picking off a sense signal from the mechanical oscillator; and demodulating the sense signal to obtain a sensed parameter. - View Dependent Claims (9, 10, 11, 12)
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13. A gyroscope control system comprising:
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a first phase locked loop connected to a first output of the gyroscope; a second phase locked loop connected to an output of the first phase locked loop; a signal selector connected to an output of the second phase locked loop and to an input of the gyroscope a demodulator connected to a second output of the gyroscope; and wherein; the demodulator occasionally reads a gyroscope rotation rate from a signal from the second output of the gyroscope; and the signal selector prevents a signal from the output of the second phase locked loop from going to the input of the gyroscope when the demodulator reads a gyroscope rotation rate from a signal of the second output of the gyroscope. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification