PROBLEM TO BE SOLVED: To provide an interpolation error estimating method capable of easily and correctly estimating encoder interpolation error. ;SOLUTION: The interpolation error estimating method for estimating interpolation error when A-phase and a B-phase sine waves outputted from an encoder are interpolated by an interpolation means is provided with both an offset detection process (s10) for obtaining each offset of the sine waves when the sine waves includes offset error and the sine waves including the error are expressed by an expression (37): {A-phase sine wave = As1sin(2πx/λ)+Vs, B-phase sine wave = Ac1cos(2πx/λ)+Vc}, and an arithmetic process (s12) for obtaining the interpolation error E due to the offset by substituting each offset obtained in the offset detection process (s10) in an expression: (38) [interpolation error E=(λ/2π){(-Vs/As1)cos u+(Vc/Ac1)sin u}].;COPYRIGHT: (C)2003,JPO
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机译：要解决的问题：提供一种插值误差估计方法，该方法能够轻松，正确地估计编码器插值误差。 ;解决方案：插值误差估计方法用于在插值装置对从编码器输出的A相和B相正弦波进行插值时估计插值误差，同时提供了两个偏移检测过程（s10），用于获得当正弦波包括偏移误差并且正弦波包括偏移误差时，正弦波由表达式（37）表示：{A相正弦波= As 1 sin（2＆pi; x /＆lambda;） + Vs，B相正弦波＝ Ac 1 cos（2πx/λ）+ Vc}，以及用于通过代入获得由偏移引起的插值误差E的算术处理（s12）。在偏移检测处理（s10）中获得的每个偏移的表达式为：（38）[内插误差E =（λ/2π）{（-Vs / As 1 ）cos u +（Vc / Ac 1 ）sin u}] .;版权：（C）2003，JPO
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