Performance degradation data based NC rotary table reliability predictions using a single sample
ZHANG Yun, YU Guang, WANG Liping, JIANG Nan
Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipment and Control, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Abstract：Reliability evaluations of numerical control (NC) rotary tables are limited by their good reliability, long lives and few samples. This paper presents a reliability evaluation method based on performance degradation data for NC rotary tables. The test data is expanded by measuring the performance degradation of a rotary table at different angles to calculate a pseudo-life for the rotary table. The accuracy of the rotary table reliability evaluation is improved using the virtual augmentation principle to expand the test data with the virtual augmented samples analyzed mathematically. The results show that this method can be used to determine various reliability indexes such as the reliability, failure distribution density function and predicted average life of NC rotary tables. This method significantly reduces the test costs and time.
张云, 于广, 王立平, 姜楠. 基于性能退化数据的数控转台单子样可靠性分析[J]. 清华大学学报（自然科学版）, 2020, 60(4): 299-305.
ZHANG Yun, YU Guang, WANG Liping, JIANG Nan. Performance degradation data based NC rotary table reliability predictions using a single sample. Journal of Tsinghua University(Science and Technology), 2020, 60(4): 299-305.
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2020, Vol. 60 
