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The foundation of a data processing engine running on a large cluster is its programming model that defines data processing operations and data movements. A special kind of communication activities that are not normally defined in the programming model but are often used in ad hoc ways in system development, is called out-of-band communications. The existing ad hoc solutions of out-of-band communications...
Improved blade tip clearance management in high pressure turbine can provide dramatic improvements in specific fuel consumption (SFC), time on wing, engine efficiency, increased payload and mission range capabilities. In order to achieve the goal that keeping clearance at desired operating point in complete flight process, the active tip clearance control system was analysis firstly, and then a controller...
A challenging problem in aircraft engine health management (EHM) system development is to detect and isolate faults in system components (i.e., compressor, turbine), actuators, and sensors. Existing nonlinear EHM methods often deal with component faults, actuator faults, and sensor faults separately, which may potentially lead to incorrect diagnostic decisions and unnecessary maintenance. Therefore,...
The free-piston generator is an energy conversion device which integrates a combustion engine and a linear electrical generator into a single unit. Due to its benefits in simple structure, high efficiency and robustness, the free-piston generator is very suitable for application in series hybrid electric vehicles. This paper proposes a linear magnetic-geared machine for free-piston generator. It integrates...
To improve the fuel economic character of bus, a hydraulic accumulator-type braking energy regeneration system is designed. Hydraulic accumulator was designed for braking energy storage. Hydraulic pump/motor was aimed at braking energy recovery and regeneration conversion. Electromagnetic clutch is a device used to mechanical connection and control. The composing scheme of electronic control system...
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