In the process of developing the vertical crankshaft comprehensive measuring instrument, owing to the problems of complex calculation and low efficiency of the existing crankshaft main journal cylindricity evaluation algorithm, a cylindricity error optimization algorithm based on step acceleration is proposed. As per the requirement of a measuring device of crankshaft, a mathematical model for evaluating cylindricity error is also proposed, and the cylindricity error in crankshaft journal with minimum assessment requirement is calculated by the step acceleration based optimization algorithm. Then, a certain type of engine crankshaft is taken as an object for detecting the main journal cylindricity error using the proposed new algorithm on the platform of a vertical crankshaft comprehensive measuring machine, and the measurement uncertainty analysis is performed. Compared to Talyrond290, the detection error of the measurement results is found to be within 0.5 um. In comparison with the geometric hexagon cylinder optimization algorithm, the results of the proposed methodology are found to be highly consistent and the computation time is reduced by 27.8%. Therefore, the proposed algorithm is practical.

在立式曲轴综合测量仪研制过程中，针对现有曲轴主轴颈圆柱度评价算法计算复杂、效率低的问题，提出了一种基于步进加速度的圆柱度误差优化算法。针对曲轴测量装置的要求，还提出了一种评估圆柱度误差的数学模型，并采用基于步进加速度的优化算法计算了评估要求最低的曲轴轴颈圆柱度误差。然后，以某型发动机曲轴为对象，在立式曲轴综合测量机平台上采用提出的新算法检测主轴颈圆柱度误差，并进行测量不确定度分析。与 Talyrond290 相比，测量结果的检测误差在 0.5 um 以内。与几何六边形圆柱优化算法相比，该方法的结果高度一致，计算时间减少了27.8%。因此，所提出的算法是实用的。