基于DSP、ADC应用的转台角度解算及补偿技术

设计了一种高速、高精度旋转变压器 数字转换器，在正弦激励载波的正、负峰值处使用ADC(模数转换器)对旋转变压器的正、余弦模拟调制输出采样，在DSP中利用采样值进行软件解算与处理，最终获得双通道旋转变压器的角度。提出一种对旋转变压器正余弦输出相位和幅值误差的补偿方法，并给出了确定误差参数的具体方案，以及此时解算角度象限的判定方法。实验结果表明，提出的低成本解算系统计算速度快，静态解算精度达到0.01以上，动态解算精度达到0.05以上。

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.