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Cache locking improves timing predictability at the cost of performance. We explore a novel approach that opportunistically employs both cache analysis and locking to enhance schedulability in preemptive multi-tasking real-time systems. The cache is spatially shared among the tasks by statically locking a portion of the cache per task. To overcome the issue of limited cache space per task, we keep...
To solve the difficulty of determining the reliability of each sensor and fusing data measured by different sensors, a multi-sensor data fusion method based on the set-pair identity degree function and connection number is proposed. The mutual supportability of multiple sensors is obtained from the identity degree function. Then the identity degree of observation data and sensor characteristic function...
Sensorless vector control has been studied broadly, and motor speed identification is exactly very important. According to the fundamental equations of asynchronous motor for vector control, a MRAS speed identification algorithm is obtained by measured motor stator voltage and currents. The simulation result shows that this MRAS speed identification model meets the needs of dynamic characteristic...
Based on the design of one kind multistage flameproof submerge pump for coal mine, the influence of the geometric parameters to the performance of the impeller was analyzed. The performance of the pump was predicted by the commercial software FLUENT. Reynolds-averaged Navier-Stokes equations was discretized, solved with κ-ε turbulence model and the SIMPLEC algorithm in double coordinate system. The...
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