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基于1553B总线的通信接口及其应用 总被引:2,自引:0,他引:2
论述了MIL-STD-1553B总线作为军用标准的特点及其通信接口的要求.通过通信驱动器BU-61580实现单片机与MIL-STD-1553B间通信的实例,讲述了用1553B总线通信的可行性及BU-61580作为1553B接口芯片的特点和具有的功能,并给出了通信框图和部分程序.实践证明,用1553B进行通信能将数据完整可靠地传送到总控制处. 相似文献
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为了研究MIL-STD-1553B总线协议在某航空机载设备中的使用方法,提升1553B总线远程终端的性能,通过分析1553B总线的结构和特点,提出了采用DSP作为处理器,以BU-64843作为协议芯片实现远程终端(RT)的方案,并进行了硬件和软件的详细设计。相比传统以BU-61580为协议芯片的RT,简化了硬件设计,提高了数据处理能力。对设计的RT进行了1553B总线消息的接收、发送测试,结果表明其能够可靠地实现总线数据的传输,在高性能嵌入式设备的研制中具有一定的工程应用前景。 相似文献
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László A. Jeni András Lőrincz Tamás Nagy Zsolt Palotai Judit Sebők Zoltán Szabó Dániel Takács 《Image and vision computing》2012
Person independent and pose invariant estimations of facial expressions and action unit (AU) intensity estimation are important for situation analysis and for automated video annotation. We evaluated raw 2D shape data of the CK+ database, used Procrustes transformation and the multi-class SVM leave-one-out method for classification. We found close to 100% performance demonstrating the relevance and the strength of details of the shape. Precise 3D shape information was computed by means of constrained local models (CLM) on video sequences. Such sequences offer the opportunity to compute a time-averaged ‘3D personal mean shape’ (PMS) from the estimated CLM shapes, which – upon subtraction – gives rise to person independent emotion estimation. On CK+ data PMS showed significant improvements over AU0 normalization; performance reached and sometimes surpassed state-of-the-art results on emotion classification and on AU intensity estimation. 3D PMS from 3D CLM offers pose invariant emotion estimation that we studied by rendering a 3D emotional database for different poses and different subjects from the BU 4DFE database. Frontal shapes derived from CLM fits of the 3D shape were evaluated. Results demonstrate that shape estimation alone can be used for robust, high quality pose invariant emotion classification and AU intensity estimation. 相似文献
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由于MIL-STD-1553B总线良好的通讯性能,在现代航空通讯系统中,MIL-STD-1553B总线正发挥着十分重要的作用.文中以DDC公司的BU-61580芯片作为MIL-STD-1553B总线接口的核心控制器,针对航空动力控制系统,介绍其硬件接口电路设计要点,以及实现1553B总线远程终端和总线控制器的软件设计方法,利用航空动力控制系统的双通道特点,实现了对1553B总线通讯的自检测功能. 相似文献
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