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基于VXI总线的射频多路转接器在测控系统中有广泛的应用。按照VXI总线PnP规范,采用FPGA RELAYS的方法实现该模块的设计。该模块是一种单槽、C尺寸、寄存器基器件。用一块FPGA实现VXI总线接口转换,进而控制继电器的开关状态。经测试表明,该模块工作稳定,能够有效地实现射频信号的多路切换功能。 相似文献
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简要介绍了交通信号机的功能及利用PLC实现的方法,解决了长期以来交通信号机存的可靠性差的问题,同时实现了交通信号机的智能化,使用结果表明,信号机系统功能完善,性能稳定,可靠。 相似文献
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针对目前交通信号机多采用定时控制或感应控制,难以实现真正意义上的交通参数动态优化,提出一种基于TMS320C6713DSP的自适应智能交通信号机的设计方案;由于选用了高速浮点处理器件,该系统可进行在线动态优化以实现自适应控制;文章详细介绍了系统组成和工作原理,并给出了具体的软硬件设计方案;使用结果表明,这种智能交通信号机系统性能稳定可靠,功能较强,可以方便地实现交通网络协调控制。 相似文献
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针对多型飞机弹射座椅电气附件功能和性能测试,传统人工检测效率低、时间长、强度大且易出错的难题,需要研制一台座椅电气自动综合检测设备。为了实现检测设备的自动化和可扩展要求,提出了一种基于640路信号切换模块、数字多用表和耐压绝缘仪的研制方案。利用水银继电器、串口通信模块和FPGA等研制了信号切换模块;综合运用虚拟仪器技术和数据库技术,设计开发了检测设备测试程序。测试验证结果表明,该检测设备实现了对多型座椅电气附件的快速准确的自动检测,同时具有扩展测试项目的功能,为检测座椅电气附件提供了先进的技术手段,提高了工作效率。 相似文献
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传统物联网通信传输设备信号源切换控制中,受丢包问题的影响,易导致切换控制误差大的问题,提出基于节点监控的多频段信号源远程切换控制技术;通过分析物联网通信传输设备,提出信号控制框架,对设备多频段信号源切换节点进行监控;依据节点监控结果,发现多频段信号源远程切换中的问题节点,通过设定动态阈值,确定问题信号节点所在具体位置;通过动态控制机制和丢包计算公式为依据,解决丢包问题造成的信号源切换控制误差大的问题;采用Netflow数据交换方式,实现对定位节点处信号源远程切换的控制;实验结果表明,该方法比传统方法控制误差小0.71,可提高信号源远程切换控制效果。 相似文献
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针对传统MCS-51单片机设计交通信号机存在的不足,在进行设计需求分析和功能分析的基础上,选用ATMEL公司的ATmega128单片机进行新型智能交通信号机的设计,并给出了各功能模块电路的原理图和主程序流程图,测试结果表明研制的交通信号机性能稳定,功能强,便于实现"绿波带"控制和交通网络协调控制. 相似文献
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介绍矩形窗函数的实验及TektrolqiXMS02000型混合信号永波器为数据处理和分析提供了大量真实的原始实验数据,及与仿真软件结合进行信号处理,克服信号采集和数字化硬件的瓶颈制约。 相似文献
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光纤陀螺信号的数字处理方法 总被引:3,自引:1,他引:2
光纤陀螺(FOG)有着广泛地应用,如何有效地提高精度具有重要意义。根据FOG信号漂移的数学模型,分别采用了经典傅立叶分析的FIR低通滤波器和小波变换的阈值去噪对某型FOG的输出信号进行了消噪处理。实验证明了小波阈值在消除陀螺漂移和基座动态干扰应用中的优越性。 相似文献
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This paper servos to define a function space representation of the concepts of passivity and positive reality. Linear time-varying differential systems are utilized as a vehicle for bringing these abstract concepts to a concrete form. Necessary conditions and sufficient conditions are then established in terms of the system parameters to ensure the aforementioned concepts. In the course of this study, earlier results of Silverman (1968) are extended to cover a larger class of time-varying systems. 相似文献
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KunZhou Hu-JunBao Jiao-YingShi Qun-ShengPeng 《计算机科学技术学报》2004,19(5):0-0
Compression of mesh attributes becomes a challenging problem due to the great need for efficient storage and fast transmission. This paper presents a novel geometric signal compression framework for all mesh attributes, including position coordinates, normal, color, texture, etc. Within this framework, mesh attributes are regarded as geometric signals defined on mesh surfaces. A planar parameterization algorithm is first proposed to map 3D meshes to 2D parametric meshes. Geometric signals are then transformed into 2D signals, which are sampled into 2D regular signals using an adaptive sampling method. The JPEG2000 standard for still image compression is employed to effectively encode these regular signals into compact bit-streams with high rate/distortion ratios. Experimental results demonstrate the great application potentials of this framework. 相似文献
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Taous-Meriem Laleg-Kirati Emmanuelle Crépeau Michel Sorine 《Mathematics of Control, Signals, and Systems (MCSS)》2013,25(1):37-61
This study introduces a new signal analysis method, based on a semi-classical approach. The main idea in this method is to interpret a pulse-shaped signal as a potential of a Schrödinger operator and then to use the discrete spectrum of this operator for the analysis of the signal. We present some numerical examples and the first results obtained with this method on the analysis of arterial blood pressure waveforms. 相似文献
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细胞信号转导网络的结构复杂,规模庞大,具有高度非线性,数学模型的参数和变量数目很多,有效估计未知参数是系统生物学主要的研究问题之一。提出以Fisher信息矩阵和估计参数的协方差矩阵为基础,利用不同的优化实验设计方法,研究NF-κB信号转导网络输人信号IKK初浓度的最优设计问题,分析模型参数的置信区间,为参数估计设计优化实验。仿真结果表明,采用E-最优实验设计准则,获得输入信号IKK初浓度为0.06μM,能够提供较多的实验信息,提高参数估计的精度。 相似文献
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The effect of the bias in a sequence of signal samples and sequence of signal derivative samples on the signal reconstruction
accuracy is considered for a bandwidth-limited signal.
Vitalii M. Efimov. Born 1933. Graduated from the Moscow Institute of Aviation. Received candidate’s degree in 1964. Leading researcher at the
Institute of Automatics and Electrometry, Siberian Division, Russian Academy of Sciences. Scientific interests: signal sampling
and quantization and processing and squeezing of digital data. Author of 85 papers.
Aleksandr L. Reznik. Born 1948. Graduated from Novosibirsk State University in 1969. Received candidate’s degree in 1981. Head of the laboratory
of the Institute of Automatics and Electrometry, Siberian Division, Russian Academy of Sciences. Scientific interests: analytical
and numerical methods for solving complex probability problems with computer calculations. Author of 64 papers.
Andrei V. Torgov. Born 1959. Graduated from Novosibirsk State University in 1983. Leading software engineer at the Institute of Automatics
and Electrometry, Siberian Division, Russian Academy of Sciences. Scientific interests: image processing and digital filtering.
Author of 17 papers. 相似文献