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When design complex product like electrohydrostatic actuator (EHA), all of the experts from different disciplines need to co-design and cooperate. Design variables in different disciplines couple together and affect the object functions, constraint condition. This article use multidisciplinary design optimization (MDO) method - collaborative optimization (CO) to design and optimize EHA. When performing...
Due to inherent delivery fluctuation of piston pump, its measurable signals are full of structure coupling and noise besides failure feature that make the system illegible and fault diagnosis difficult. This paper presents a contract support vector machine to extract the effective information from data and eliminate the redundant attribute among different data. Then utilize the support vector machine...
Directing to the difficulties of fault isolation based on mathematical model, this paper presents a new fault isolation method that utilizes the limit apriori knowledge of expert, infers the failure process recursively and realizes the fault isolation with Bayes' reasoning. Through dividing the system into several levels hierarchically according to their information flow, the system failure process...
This paper presents an integrated reliability definition and mathematical metrics based on function reliability and performance reliability, in which the function reliability highlights failure causality from system to components and the performance reliability focuses on the dynamic performance degradation with operational time. Based on the simulation techniques, this paper establishes the simulation...
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