应用快速傅里叶变换算法对靶丸圆周轮廓数据进行分析，获得了靶丸表面外轮廓或内轮廓模数-功率谱特征曲线。
The power spectra curve as a function of the mode number of outer or inner profiles are also calculated by the application of fast Fourier transform to the circumferential profile data.
该方案采用衰减曲线法进行换算PID参数整定，获得自适应调节律。
The adaptive law was obtained from similarity PID parameters determined by the attenuation curve method.
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