The objective of the work reported herein was to use a systems engineering approach to guide development of integrated\r\ninstrumentation/sensor systems (IISS) incorporating communications, interconnections, and signal acquisition. These require\r\nenhanced suitability and effectiveness for diagnostics and health management of aerospace equipment governed by the principles\r\nof Condition-based maintenance (CBM). It is concluded that the systems engineering approach to IISS definition provided clear\r\nbenefits in identifying overall system requirements and an architectural framework for categorizing and evaluating alternative\r\narchitectures, relative to a bottom up focus on sensor technology blind to system level user needs. CBM IISS imperatives\r\nidentified include factors such as tolerance of the bulk of aerospace equipment operational environments, low intrusiveness, rapid\r\nreconfiguration, and affordable life cycle costs. The functional features identified include interrogation of the variety of sensor types\r\nand interfaces common in aerospace equipment applications overmultiplexed communication media with flexibility to allow rapid\r\nsystem reconfiguration to adapt to evolving sensor needs. This implies standardized interfaces at the sensor location (preferably to\r\nopen standards), reduced wire/connector pin count in harnesses (or their elimination through use of wireless communications).
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