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The Undercarriage is affected by the dynamic load when the Unmanned Aerial Vehicle (UAV) taxis and lands on the ground, especially during the landing to the ground, it needs higher requirements. The dynamical deformation and strength characteristics of the Undercarriage directly determine its performance and affect the safety of the UAV. In the article, we study the dynamical deformation, the strength...
Evaluation of System Effectiveness (SE) plays a significant role in network design, construction, optimization, etc. of Wireless Sensor Networks (WSNs). This paper develops a rational and comprehensive five-layer indicator model which incarnates SE or monomial efficiency of WSNs. Also, we propose a valid evaluation model HFCE with Analytic Hierarchy Process (AHP) and Fuzzy Comprehensive Evaluation...
This paper create a high fidelity plant model of an aircraft landing gear to inclusion into a full aircraft flight simulation for accurately analyzing the performance and influence of landing gear system. The use of domain specific modeling software enables detailed modeling of the physics and facilitates accurate computational simulation of the flight dynamic, aerodynamic, landing gear dynamic and...
LEACH (Low Energy Adaptive Clustering Hierarchy) is a clustering-based protocol that utilizes randomized rotation of the cluster-heads to evenly distribute the energy load among the sensor nodes in the network. This classical protocol has been widely used in wireless sensor network (WSN). However, it has the disadvantage of irrationality of electing cluster-head and of unbalanced energy consumption...
Wireless sensor networks (WSNs) currently operate in the unlicensed industrial, scientific and medical (ISM) spectrum band. However, more and more wireless equipments make this band overcrowded. The tremendous growth in the applications of WSNs has posed great challenges for the precious radio electromagnetic spectrum resource. The limited wireless spectrum resource will be the bottleneck for the...
Collaborative simulation is proposed as a technique to support design evaluation with higher fidelity by addressing the interacting phenomena during the development of complex system. To facilitate the collaborative simulation, the High Level Architecture (HLA) was proposed and evolved as a standard with its interface specification, object model template (OMT) and rules. HLA provides a common structural...
Monitoring grain storage situation is playing a very important role in grain storage safety. Traditional monitor system for grain depots has several drawbacks, such as large cable coverage, more interference and lighting strike, high maintenance cost and so on. To deal with these issues, a novel scheme of the monitor system for grain depots is proposed based on wireless sensor network (WSN). This...
The network routing could be simplified by clustering algorithm in wireless sensor network (WSN). Aimed at the occasion with a large amount of nodes but without whole-network time synchronization mechanism, a self-adaptive clustering algorithm for network topology control is proposed. In this algorithm, the cluster structure can be adjusted automatically according to the nodes distribution and network...
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