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主动变结构悬架研究现状综述 被引量:1
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作者 章新杰 徐仁辉 贺冠杰 《汽车文摘》 2019年第6期17-21,共5页
悬架系统的各项性能要求互相影响和冲突。被动悬架在设计时会平衡各向性能指标,设计完成后难以依据行驶工况实时调节;可控悬架能依据工况动态调整悬架系统性能,给出了改善悬架性能的方法。可控悬架按其工作原理可分为全主动悬架、半主... 悬架系统的各项性能要求互相影响和冲突。被动悬架在设计时会平衡各向性能指标,设计完成后难以依据行驶工况实时调节;可控悬架能依据工况动态调整悬架系统性能,给出了改善悬架性能的方法。可控悬架按其工作原理可分为全主动悬架、半主动悬架和主动变结构悬架。其中,主动变结构悬架是通过动态控制悬架几何结构来动态调节悬架性能,相比常见全/半主动悬架,能有效兼顾性能、效率和能耗;相比传统被动悬架,可以动态调整悬架系统性能,释放悬架潜能。本文按照执行方式将主动变结构悬架分为主动车轮外倾角、主动车轮前束角和主动弹簧减振器组位置三类,分别分析各自特点及发展现状,并从构型设计、控制系统及其智能网联化下的机遇与挑战三方面剖析了主动变结构悬架的发展趋势。 展开更多
关键词 可控悬架 主动变结构悬架 主动车轮外倾角 主动车轮前束角 主动弹簧减振器组位置
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Jointly beam stealing attackers detection and localization without training:an image processing viewpoint
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作者 Yaoqi YANG Xianglin WEI +3 位作者 renhui xu Weizheng WANG Laixian PENG Yangang WANG 《Frontiers of Computer Science》 SCIE EI CSCD 2023年第3期145-160,共16页
Recently revealed beam stealing attacks could greatly threaten the security and privacy of IEEE 802.11ad communications.The premise to restore normal network service is detecting and locating beam stealing attackers w... Recently revealed beam stealing attacks could greatly threaten the security and privacy of IEEE 802.11ad communications.The premise to restore normal network service is detecting and locating beam stealing attackers without their cooperation.Current consistency-based methods are only valid for one single attacker and are parametersensitive.From the viewpoint of image processing,this paper proposes an algorithm to jointly detect and locate multiple beam stealing attackers based on RSSI(Received Signal Strength Indicator)map without the training process involved in deep learning-based solutions.Firstly,an RSSI map is constructed based on interpolating the raw RSSI data for enabling high-resolution localization while reducing monitoring cost.Secondly,three image processing steps,including edge detection and segmentation,are conducted on the constructed RSSI map to detect and locate multiple attackers without any prior knowledge about the attackers.To evaluate our proposal’s performance,a series of experiments are conducted based on the collected data.Experimental results have shown that in typical parameter settings,our algorithm’s positioning error does not exceed 0.41 m with a detection rate no less than 91%. 展开更多
关键词 beam-stealing attacks DETECTION LOCALIZATION image processing
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