Method for determining characteristic parameters of an oscillator
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorAntoine Nowodzinski
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Abstract
A method for determining characteristic parameters of an electrostatic actuation oscillator, where the method includes generating a first excitation voltage defined as being the sum of a first sinusoidal voltage and a voltage pulse; applying the first excitation voltage at the input of the oscillator; acquiring in the time domain a first response voltage present at the output of the oscillator when the first excitation voltage is applied at the input of the oscillator; obtaining, by transformation in the frequency domain, a first amplitude spectral density of the first response voltage; determining the characteristic parameters of the oscillator from the first amplitude spectral density.
Claims6
A method for determining characteristic parameters of an electrostatic actuation oscillator, where the characteristic parameters have a resonant frequency, the method comprising:
- estimating the oscillator's resonant frequency;
- defining a frequency range for a search zone, in which the resonant frequency is sought, wherein the search zone is centred on an estimated resonant frequency;
- generating an excitation voltage defined as a sum of a sinusoidal voltage with a constant frequency equal to the estimated resonant frequency and a pulse response of a low-pass filter with a spectral width equal to a width of the search zone;
- applying the excitation voltage at an input of the oscillator;
- acquiring in the time domain a response voltage present at an output of the oscillator when the excitation voltage is applied at the input of the oscillator;
- obtaining, by transformation in the frequency domain, an amplitude spectral density of the response voltage;
- and
- determining the characteristic parameters of the oscillator from the amplitude spectral density.
A method for determining characteristic parameters of an electrostatic actuation oscillator, where the characteristic parameters have a resonant frequency, the method comprising:
- estimating the oscillator's resonant frequency;
- defining a frequency range for a search zone in which the resonant frequency is sought, wherein the search zone is centred on an estimated resonant frequency;
- generating a first excitation voltage defined as a sum:
- of a sinusoidal voltage having a first constant frequency;
- and
- of a pulse response of a band-pass filter having a spectral width equal to one quarter of a width of the search zone;
- generating a second excitation voltage defined as a sum:
- of a sinusoidal voltage having a second constant frequency such that the sum of the first frequency and the second frequency is equal to twice a median frequency on which the search zone is centred;
- and
- of a pulse response of a band-pass filter having a spectral width equal to one quarter of the width of the search zone;
- applying successively the first excitation voltage and the second excitation voltage at an oscillator's input;
- acquiring in the time domain a first response voltage and a second response voltage present successively at an output of the oscillator when the first excitation voltage and the second excitation voltage are applied respectively at the input of the oscillator;
- obtaining, by transformation in the frequency domain, a first amplitude spectral density of the first response voltage and a second amplitude spectral density of the second response voltage;
- reconstituting an amplitude spectral density from the first amplitude spectral density and the second amplitude spectral density;
- wherein the characteristic parameters of the oscillator are determined from the reconstituted amplitude spectral density.
Dependencies are inferred from the claim text.