Methods and apparatus for generating a sinusoidal motor...

G - Physics – 01 – C

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G01C 19/56 (2006.01) G06T 3/40 (2006.01) H03H 17/02 (2006.01) H03H 17/04 (2006.01) H03H 21/00 (2006.01)

Patent

CA 2497886

An apparatus is described which reduces a time delay and a resultant phase shift in a gyroscope motor drive signal (90). The motor drive signal originates from a numerically controlled oscillator (32) whose output (60) is sampled at a predetermined rate. The apparatus includes a first element (108) which upsamples the oscillator output signal samples and a band pass filter (100) configured to receive an output from the first element and remove spectral components from the output of the first element. The apparatus further includes a third element (102) which generates a tuning parameter, .beta.'0 (166), for tuning of the band pass filter and a scaling multiplier (112) configured to normalize an output of the filter.

La présente invention concerne un appareil qui réduit un retard et le déphasage résultant dans un signal de pilotage de moteur de gyroscope (90). Le signal de pilotage du moteur provient d'un oscillateur numériquement commandé (32) dont la sortie (60) est échantillonnée à une vitesse définie. A cet effet, l'appareil comporte, d'une part un 1?er¿ élément (108) qui effectue un suréchantillonnage portant sur des échantillons du signal de sortie de l'oscillateur, et d'autre part un filtre passe-bande (100) configuré pour prendre en compte une sortie du 1?er¿ élément et en éliminer des composantes spectrales. L'appareil comporte en outre un 3?ème¿ élément (102) qui produit un paramètre d'accord, .beta.'¿0? (166), servant à accorder le filtre passe-bande, et un facteur scalaire (112) configuré pour normaliser une sortie du filtre.

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