Abstract:The F-35 prognostic health management (PHM) system will generate a large volume of data on current and predicted component health. Tools are needed to automatically assimilate and analyze this data, and present findings and recommended actions to the user. These automated reasoner tools are… more
Abstract:The military is actively implementing diagnostics, prognostics, and health management technologies across platforms in an effort to reduce maintenance costs, increase readiness and availability, and improve safety. In aircraft electric power systems, the largest maintenance driver is the generator,… more
Abstract:Diagnostic and prognostic algorithms for many aircraft subsystems are steadily maturing. Unfortunately there is little experience integrating these technologies into a complete and practical on-board prognosis system, and integration often proceeds in an ad-hoc manner. Sentient Corporation proposes… more
Abstract:Although prognostic health monitoring systems for the mechanical aspects of the LAV-25 are currently under development, a comparable system for diagnosis of the electrical and weapons systems does not exist. System diagnosis is an expertise-based craft that is easily lost when turnover rates (due… more
Abstract:A great deal of effort has been put into health management of turbine engine turbomachinery components, such as bearings, disks and blades, while engine externals have received less research attention. Accessories on gas turbine engines include electrical, hydraulic, lubrication, and fuel subsystems… more
Abstract:Obtaining reliable diagnostic information on turbine engine main shaft bearings is difficult due to space constraints, operating environment, and poor transmissibility of vibration from the bearing to a case-mounted accelerometer. Prior work has shown that bearing cage parameters provide valuable… more
Abstract:The Air Force Research Laboratory (AFRL), Military Satellite Communication (MILSATCOM), and National Aeronautics and Space Administration (NASA) have a current and future need for advanced commercially available inherently radhard primitive cell libraries to support new designs for satellites and… more
Abstract:Various technologies available to space system designers that operate at different voltage levels. It is, however, important to interface, maintain, and update these systems. For example, the Sun Earth Connection (SEC) missions are likely to have a variety of experiments needing to be accomplished… more
Abstract:There is still a need for low-cost, reliable dissolved gas sensors for water quality in environmental monitoring, aquaculture wastewater treatment and industry in order to provide analytical capability to facilities, communities greatly in need of such capability as water budgets become increasingly… more
Abstract:Manning Applied Technology proposes to develop a handheld infrared spectrometer, ideally suited to detection of airborne chemical agents at and below permissible exposure limits. This approach offers unmatched sensitivity and specificity for detection of all types of chemical vapors. The… more
Abstract:DESCRIPTION (provided by applicant): The sequencing of genomes has generated a huge amount of data still to be annotated. Computational methods are available to detect putative transcriptional promoter regions, but they are not 100% efficient and must be confirmed by experimentation. Unfortunately… more
Abstract:Computational fluid dynamics (CFD) is used as an analysis tool to help the designer gain greater understanding of the fluid flow phenomena involved in the components being designed. The next step in the design process is to modify the design to improve the components performance, typically performed… more
Abstract:We investigate the development of a secure fuselet runtime environment built on a foundation of aspect-oriented web services. Aspect-oriented techniques enable the modularization of crosscutting concerns such as remote access, security, and monitoring using code instrumentation. We compose… more
Abstract:This Small Business Innovation Research (SBIR) Phase II research project will develop a prototype Induced Positron Manufacturing Damage System (IPMDS) to be used to assess initial component quality, and manufacturing damage effects for Ti-6Al-4V and IN738 components. The IPMDS is based on the… more
Abstract:It has been well established that disease in stored potatoes and many other vegetables and fruits generate a variety of volatile compounds that are released into the storage space Furthermore, specific types of disease produce volatile compounds that generate unique fingerprints on ultra-sensitive… more
Abstract:Bearing failure in satellite applications is related to lubricant starvation rather than fatigue, and health monitoring systems for these applications must be able to observe subtle changes related to lubrication state. Phase I included an experimental study to identify candidate monitoring… more
Abstract:Hanger bearing failures occur unexpectedly and have resulted in loss of aircraft and life in both military and civilian rotorcraft. New Health and Usage Monitoring Systems (HUMS) that are currently being demonstrated on the UH-60 include sensing capabilities that offer the potential to diagnose and… more
Abstract:During Phase I, the Blackhawk hanger bearing and oil cooler fan bearing applications were studied in detail, including analysis of vibration and temperature data from used oil cooler bench tests (conducted by Sikorsky) and used hanger bearing bench tests (conducted by Sentient). This data, along… more
Abstract:Development of accurate and effective new diagnostic and prognostic capabilities for JSF PHM will require extensive data on both health and faulted systems states. While healthy signatures can be collected quickly and easily, faulted systems are only observed rarely, and duplicating faulted… more
Abstract:Modern turbine engine lifing approaches compute damage accumulation in real time based on actual usage, substantially increasing the useable life over a-priori cycle or hour limits based on assumed worst-case operating conditions. However, these new algorithms are complex, consume substantial… more
Abstract:The latent degradation of precision control system actuators affects dynamic performance and can push the performance characteristics of the actuator out of the regime needed for stable operation of the aircraft control system. Current system-level methods are not sensitive enough to actuator… more
Abstract:Fault detection and isolation algorithms are often developed with data from steady-state tests, and many algorithms perform well under these controlled conditions. However, when diagnostics are used in highly dynamic environments, sensitivities to changing loads or speeds become apparent. Vibration… more
Abstract:Grease lubricated bearings are widely used in aircraft for driveshaft support, fans, and accessories. These components are a maintenance intensive item requiring regular replenishment or replacement. In addition, occasional failures occur and have resulted in loss of aircraft. Sentient Corporation,… more
Abstract:Current animal telemetry devices are large and heavy due to their reliance on batteris to power the electronics and radios. Because of this, many species can't be effectively studied since they can not support the device weight. The smaller size will allow animal telemetry devices to be developed… more
Abstract:This SBIR Phase I project will develop a health and motion monitoring sensor and analysis system to support the return of military personnel with prosthetic devices to active duty. DoD is allowing increasing numbers of Soldiers with prosthetics to return to active duty if they are performance… more
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