关键词: 数控装备, 可靠性评估, 点估计, 置信区间

Abstract: To tackle characteristics of nonlinear and low accuracy for traditional reliability assessment,a novel machine tool reliability assessment method based on Bootstrap and Support Vector Machines (SVM) was proposed.The reliability assessment models for point estimation and confidence interval were respectively set up under the condition of the small sample.A sequence diagram of unified modeling language was adopted to describe the entire process of machine tool reliability assessment.A case was implemented by simulation analysis to validate the method.It suggested that the nonlinear and low accuracy encountered in classic machine tool reliability assessment might be solved by using the proposed method when only small sample was obtained.

Key words: machine tool, reliability assessment, point estimation, confidence interval