Mechanical oscillator control electronics
AssigneeHoneywell International Inc.
InventorNick Anthony Demma
Life of this patent
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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.
Claims20
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.
A method for sinusoidal mechanical oscillator control comprising:
- 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.
A gyroscope control system comprising:
- 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.
Dependencies are inferred from the claim text.