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基于分形几何理论，通过分析随机表面的轮廓谱矩和表面谱矩的特性，提出了三维粗糙表面的均方根斜率评定方法，并用平磨样块试验证实了该法的正确性。
Based on the fractal geometry theory, the method of evaluating the root mean square slope of the three-dimensional rough surface is proposed by analyzing the characteristics of the surface profile moment and surface spectrum moment of the random surface. The correctness of the method is verified by the test of flat grinding sample.