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Different types of uncertainties need to be addressed in a product design optimization process. In this paper, the uncertainties in both product design variables and environmental noise variables are considered. The reliability-based design optimization (RBDO) is integrated with robust product design (RPD) to concurrently reduce the production cost and the long-term operation cost, including quality...
Evaluating probabilistic constraints plays a very important role in the reliability-based design optimization (RBDO). Traditional Monte Carlo simulation-based approach can provide a high accuracy but with low efficiency. In this paper, a subset simulation-based reliability analysis approach is provided to address the efficiency problem. The method is also compared with the typical MPP-based method.
Reliability-based design optimization (RBDO) needs to take into account of both aleatory and epistemic uncertainties. It is critical to explore these uncertainty sources and evaluate their impacts on RBDO. This paper provides a comprehensive study of uncertainties, in which the uncertainty sources are listed, categorized and their impacts are discussed. Epistemic uncertainty is of our interest, which...
This paper proposes an accelerated degradation testing (ADT) evaluation method based on Markov Chain Monte Carlo (MCMC) method. Firstly the degradation model, reliability model and accelerated model of ADT are introduced; secondly, with the information above, the ADT evaluation method based on MCMC is proposed; Thirdly, the evaluation results of this method would be studied and compared with the evaluation...
Robustness and reliability are two important issues to be considered in product design optimization under uncertainty. Robustness is used to counter manufacturing variation and improve product quality, and reliability is used to maintain structure design feasibility by probabilistic constraints. This paper considers robustness and reliability simultaneously by a multi-objective reliability-based robust...
Product design optimization under model or input variable uncertainty is commonly required, in which robustness and reliability are two important attributes of the design. In structure design, it is critical to maintain the design feasibility (or reliability); while at the same time, to counter manufacturing variations, robust design is employed in order to obtain high product quality. It is necessary,...
The paper constructs the multi-regress-analysis reliability assessment method based on the exponential regression model due to the possible fewer samples for testing in electronic products reliability assessment. By introducing environmental severe degree factors, environmental integrated factors and technique states of the product factors, the multi-regress-analysis reliability assessment method...
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