Statistical analysis of step-down stress accelerated life testing

2013 ◽  
pp. 1339-1344
Author(s):  
Wei Luo ◽  
Chunhua Zhang ◽  
Xun Chen ◽  
Yuanyuan Tan
Keyword(s):  
Statistical Analysis ◽  
Accelerated Life Testing ◽  
Life Testing ◽  
Accelerated Life ◽  
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Double-Crossed Step-Stress Accelerated Life Testing for Pneumatic Cylinder

2011 ◽  
Vol 121-126 ◽  
pp. 1274-1278 ◽  
Author(s):  
Juan Chen ◽  
De Yi Wang ◽  
Yong Ling Fu ◽  
Xiao Ye Qi
Keyword(s):  
Stress Testing ◽  
Estimation Error ◽  
Accelerated Life Testing ◽  
Constant Stress ◽  
Pneumatic Cylinder ◽  
Average Lifetime ◽  
Life Testing ◽  
Failure Data ◽  
Accelerated Life ◽  
Step Down

This paper discusses the principle and method of Double-Crossed Step-Down-Stress Accelerated Life Testing (DCSDS-ALT) for pneumatic cylinders. As to pneumatic cylinder, the step-down-stress testing failure physics can be described as cumulative degradation model. Temperature and frequency are normally chosen as the test stresses. The failure data obtained under DCSDS-ALT testing steps can be converted to those under constant stress testing. And the reliability specifications can be derived accordingly. To compare Double-stress ALTs with traditional constant stress testing shows Double-stress ALTs can meet the accuracy demand. The 5% of average lifetime estimation error and 1.85% of the characteristic lifetime error are very satisfying for pneumatic industrial lifetime prediction.

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