A gear-linkage mechanism, composed of a planetary gear mechanism and a four-bar mechanism, has the characteristic of step-cyclical output rotation under a reasonable geometric parameters. The analysis of stepping move...
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Torque, as an important indicator of the engine, is the reflection of performance of cylinder-embedded piston engine. In power stroke, torque varies at different moments, so if the impact of structural parameters on t...
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Twin-rotor piston engine (TRPE) is a new differential rotary engine, which is still under developing. In this paper, a rigid-flexible coupling dynamics model was established for the prototype TRPE-350. By combining th...
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This paper describes the algorithm principle of CRC-32 codes, and then proposes multiple bits parallel input to achieve CRC-32 checksum on the basis of the principle. To design modules using VHDL language in Quartus I...
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Online anomaly detection in wireless sensor networks (WSNs) has been explored extensively. In this paper, exploiting the spatio-temporal correlation existed in the sensed data collected from WSNs, an online anomaly de...
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It is difficult to diagnose the faults, especially multiple faults, in redundant systems by traditional diagnostic strategies. So the problem of multiple fault diagnostic strategy for redundant system was researched i...
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ISBN:
(纸本)9781936263035
It is difficult to diagnose the faults, especially multiple faults, in redundant systems by traditional diagnostic strategies. So the problem of multiple fault diagnostic strategy for redundant system was researched in this paper. Firstly, the typical characters of multiple faults (minimal faults) were analyzed, and the problem was formulated. Secondly, a pair of two-tuples were applied to denote the possible and impossible diagnostic conclusion at different diagnostic stages respectively, and a multiple fault diagnostic inference engine was constructed based on Boolean logic. The inference engine can determine the system diagnostic conclusions after executing each test, and determine whether a repair action was needed, and further determine whether a next test was needed. Thirdly, a method determining the next best test was presented. Based on the proposed inference engine and test determining method, a multiple fault diagnostic strategy was constructed. Finally, a simulation case and a certain flight control system were applied to illustrate the proposed diagnostic strategy. The simulation and practical data computational results show that the presented diagnostic strategy can diagnose multiple faults in redundant systems effectively and it is of certain application value.
Due to lack of considering the non-geometric process parameters during assembly process planning, it is difficult to control the production cycle, cost, quality, reliability, stability and consistency of high-performa...
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The maglev bogie is the key subsystem for maglev train security. To ensure life and property security, it is essential to evaluate its risk level before its operation. However, due to the complexity and uncertainties ...
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ISBN:
(纸本)9781467371902
The maglev bogie is the key subsystem for maglev train security. To ensure life and property security, it is essential to evaluate its risk level before its operation. However, due to the complexity and uncertainties of maglev bogies, a comprehensive and effective risk analysis method is needed. In this paper, a combinational method of analytic hierarchy process and fuzzy comprehensive evaluation is proposed to assess hazards in a complex maglev bogie system associated with multiple subsystems' failures. Our results show that the degree of maglev bogie's risk is within the range of acceptability. The merits of this work facilitate finding the weak links and determining the maintenance of maglev bogie system.
In wireless sensor networks,this paper puts forward a distributed fault detection algorithm to solve the node failure *** takes into account the spatial correlation of network node,based on the way of weighted distanc...
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ISBN:
(纸本)9781479947249
In wireless sensor networks,this paper puts forward a distributed fault detection algorithm to solve the node failure *** takes into account the spatial correlation of network node,based on the way of weighted distance,compares its own reading with the weighted value to judge the fault ***,the feasibility and effectiveness of the algorithm is demonstrated via computer *** simulation results show that the correct rate of fault detection is improved,and the false alarm rate of fault detection is reduced.
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