초록 ▼

In accordance with an embodiment of the present invention, a resolver system has at least one resolver and at least one amplifier in electrical communication with each resolver. A reference circuit is in electrical communication with the amplifiers. The reference circuit provides reference signals t

In accordance with an embodiment of the present invention, a resolver system has at least one resolver and at least one amplifier in electrical communication with each resolver. A reference circuit is in electrical communication with the amplifiers. The reference circuit provides reference signals to the amplifiers. A non-linearity calibration and compensation circuit in communication with each amplifier uses the amplified reference signals to provide scale factors, so as to enhance a precision of the resolver system.

대표청구항 ▼

We claim: 1. A method of compensating for error in a resolver system, the method comprising: communicating a plurality of reference signals to an amplifier that receives an output from a resolver; amplifying the reference signals; determining a plurality of coefficients that characterize a non-line

We claim: 1. A method of compensating for error in a resolver system, the method comprising: communicating a plurality of reference signals to an amplifier that receives an output from a resolver; amplifying the reference signals; determining a plurality of coefficients that characterize a non-linearity of the resolver system; determining non-linearities of a plurality of measured resolver positions using the coefficients; determining scale factors from the determined non-linearities; and applying the scale factors to the measured positions to provide corrected position. 2. The method of claim 1, wherein communicating a plurality of reference signals to an amplifier comprises communicating a plurality of voltage reference signal to a current amplifier. 3. The method of claim 1, wherein determining a plurality of coefficients that characterize a non-linearity of the resolver system comprises using a least-squared estimator to estimate the coefficients. 4. The method of claim 1, further comprising ceasing to communicate measured position information from the resolver to the amplifier when the reference signals are being communicated to the amplifier. 5. The method of claim 1, further comprising using a plurality of known positions of a gimbal as references during a calibration procedure. 6. The method of claim 1, further comprising using electrical contacts to determine a plurality of known positions of a gimbal for use as references during a calibration procedure.