Performance degradation data based NC rotary table reliability predictions using a single sample

doi:10.16511/j.cnki.qhdxxb.2019.22.049

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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.

Keywords numerical control (NC) rotary table single sample performance degradation data virtual augmentation reliability

Issue Date: 03 April 2020

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	ZHANG Yun
	YU Guang
	WANG Liping
	JIANG Nan

Cite this article:

ZHANG Yun,YU Guang,WANG Liping, et al. Performance degradation data based NC rotary table reliability predictions using a single sample[J]. Journal of Tsinghua University(Science and Technology), 2020, 60(4): 299-305.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2019.22.049 OR http://jst.tsinghuajournals.com/EN/Y2020/V60/I4/299

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