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Background
Blood centers have a dual mission to protect donors and patients; donor safety is paramount to maintaining an adequate blood supply. Elucidating donor factors associated with adverse reactions (AR) is critical to this mission.
Study design/methods
A retrospective cohort analysis of whole blood donors from 2003 to 2020 was conducted at a single blood center in northern California. Adjusted...
In this paper, the optimization process of a rotational Electro-Mechanical Actuator (EMA) for an Aerospace application is presented. Specifically, the EMA is designed for the extension and retraction of a landing gear. The main aim of the optimization process is the minimization of the overall weight of the system whilst maintaining the system dependability. Since the EMA is composed of different,...
The behavior of matrix converter (MC) drive systems under the condition of MC short-circuit faults is comprehensively investigated. Two isolation strategies using semiconductors and high speed fuses (HSFs) for MC short-circuit faults are examined and their performances are compared. The behavior of MC drive systems during the fuse action time under different operating conditions is explored. The feasibility...
With the increasing interest in matrix converter technology, in industrial, aerospace and military applications, it is desirable for these converters to continue to operate in faulty conditions. Albeit with diminished performance in some regard. However for continued operation it is necessary to localise any converter faults quickly and accurately. This paper presents a low frequency modulation table...
Matrix converters offer advantages over traditional AC-AC conversion technologies in high temperature environments; however in system critical applications were operation is paramount, it is desirable for the converter to continue operation under fault conditions, albeit with degraded performance. There have been several works in literature on the subject of fault tolerant matrix converters however...
The matrix converter is a direct AC-AC power converter topology that does not contain an intermediate DC-link stage. This paper presents different enabling technologies to enhance the suitability of the matrix converter topology for aerospace applications. The use of silicon carbide power devices to improve efficiency and reduce system weight together with an improved, high speed fault detection technique...
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