Decoding and compensation technology of turntable angle based on DSP and ADC application

We designed a high-speed and high-precision resolver-digital converter, sampled the modulated sine-cosine analog output of resolver at each peak through the sinusoidal carrier using the analog digital converter (ADC). After decoding the sample result and other operation with DSP software，we obtained the final angle of two-channel multiple resolver. Then we proposed a method for compensating the gain and phase errors between sine and cosine output of resolver，and presented the calculation of error parameters and the judgment of angle quadrant in detail. Experimental results verify the proposed low-cost decoding system has a high calculation speed and high precision of 0.01 in static condition and 0.05 in dynamic condition.