Sunil Das, Liwu Jin, Mansour Assaf, Satyendra Biswas and Emil Petriu
The implementation of fault testing environment for embedded cores-based digital circuits is a challenging endeavor. The subject paper aims developing techniques in design…
Abstract
The implementation of fault testing environment for embedded cores-based digital circuits is a challenging endeavor. The subject paper aims developing techniques in design verification and test architecture utilizing well-known concepts of hardware and software co-design. There are available methods to ensure correct functionality, in both hardware and software, for embedded cores-based systems but one of the most used and acceptable approaches to realize this is through the use of design-for-testability (DFT). Specifically, applications of built-in self-test (BIST) methodology in testing embedded cores are considered in the paper, with specific implementations being targeted towards the International Symposium on Circuits and Systems (ISCAS) 85 combinational benchmark circuits.
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Liwu Wang, Yanfeng Han, Dongxing Tang and Jianlin Cai
The purpose of this paper is to verify the effectiveness of the proposed transient mixed lubrication and wear coupling model [mixed lubrication and wear (MLW) coupling model…
Abstract
Purpose
The purpose of this paper is to verify the effectiveness of the proposed transient mixed lubrication and wear coupling model [mixed lubrication and wear (MLW) coupling model] under water lubricated conditions by comparing with the experimental results.
Design/methodology/approach
Water lubricated bearings are the key parts of the transmission system of an underwater vehicle and some surface ships. In this study, the friction and wear behaviors of rubber, nylon and polyether ether ketone (PEEK) samples with stainless steel underwater lubrication were compared by using ring-block contact structure on multifunctional friction and wear test bench-5000 friction and wear tester.
Findings
The results show that the transient wear depth and wear amount of PEEK, nylon and rubber samples under water lubrication are in good agreement with the calculated results of the theoretical model, which verifies the rationality and scientific nature of the MLW coupling model. Thus, the numerical model is applicable for the wear prediction of the journal bearing under water-lubricated conditions. Furthermore, numerical and experimental results reveal that the anti-wear performance among three water-lubricated materials can be ranked by: PEEK > nylon > rubber.
Originality/value
It is expected that this study can provide more information for experimental and numerical research of water-lubricated bearings under water-lubricated conditions.