This white paper discusses how market trends, the need for increased productivity, and new legislation have accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to market. This allows FPGA users to design their own customized safety controllers and provides a significant competitive advantage over traditional microcontroller or ASIC-based designs. Introduction The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas around machines such as fast-moving robots, and distributed control systems in process automation equipment such as those used in petrochemical plants. The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was developed in the mid-1980s and has been revised several times to cover the technical advances in various industries. In addition, derivative standards have been developed for specific markets and applications that prescribe the particular requirements on functional safety systems in these industry applications. Example applications include process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC 62304), automotive (ISO 26262), power generation, distribution, and transportation. 圖Figure 1. Local Safety System
標(biāo)簽： FPGA 安全系統(tǒng)
上傳時間： 2013-11-14
上傳用戶：zoudejile
This algorithm was developed by Professor Ronald L. Rivest of MIT and can be found presented in several languages. What I provide to you here is a C++ derivative of the original C implementation of Professor Rivets. The library code itself is platform-independant and has been tested in Redhat Linux. I ve included the sample code and makefile that I used for the Linux test. The demo, however, was written with Visual C++ 6 on a Windows 2000 platform.
標(biāo)簽： L. Professor algorithm developed
上傳時間： 2014-12-21
上傳用戶：gonuiln
This m-file displays the time waveform for the Gaussian pulse function and the first and second derivatives of the Gaussian pulse function for a 0.5 nanosecond pulse width. Other values of pulse widths may be used by changing fs,t,t1. The program uses the actual first and second derivative equations for the Gaussian pulse waveforms. The first derivative is considered to be the monocycle or monopulse as discussed in most papers. The second derivative is the waveform generated from a dipole antenna used in a UWB system. Other information is contained in the file.
標(biāo)簽： the and Gaussian displays
上傳時間： 2015-05-08
上傳用戶：leixinzhuo
The code, images and designs for this book are released under a Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. http://creativecommons.org/licenses/by-nc-sa/2.5/ You are free: * to copy, distribute, display, and perform the work * to make derivative works Under the following conditions: *Attribution. You must attribute the work in the manner specified by the author or licensor. *Noncommercial. You may not use this work for commercial purposes. *Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license identical to this one. *For any reuse or distribution, you must make clear to others the license terms of this work. *Any of these conditions can be waived if you get permission from the copyright holder. CONTACT ME Please address any questions to info@andybudd.com.
標(biāo)簽： Attribution-NonComm Creative released Commons
上傳時間： 2014-01-19
上傳用戶：chfanjiang
This source file may be used and distributed without restriction provided that this copyright statement is not removed from the file and that any derivative work contains the original copyright notice and the associated disclaimer.
標(biāo)簽： distributed restriction copyright provided
上傳時間： 2013-12-08
上傳用戶：luopoguixiong
Ajax（Asynchronous JavaScript + XML）的定義 基于web標(biāo)準(zhǔn)（standards-based presentation）XHTML+CSS的表示； 使用 DOM（Document Object Model）進行動態(tài)顯示及交互； 使用 XML 和 XSLT 進行數(shù)據(jù)交換及相關(guān)操作； 使用 XMLHttpRequest 進行異步數(shù)據(jù)查詢、檢索； 使用 JavaScript 將所有的東西綁定在一起。英文參見Ajax的提出者Jesse James Garrett的原文。 類似于DHTML或LAMP，AJAX不是指一種單一的技術(shù)，而是有機地利用了一系列相關(guān)的技術(shù)。事實上，一些基于AJAX的“派生/合成”式（derivative/composite）的技術(shù)正在出現(xiàn)，如“AFLAX”。 含實例源碼。
標(biāo)簽： standards-based Asynchronous presentation JavaScript
上傳時間： 2016-07-03
上傳用戶：tfyt
This m file simulates a differential phase shift keyed (DPSK) ultra wide bandwidth(UWB) system using a fifth derivative waveform equation of a Gaussian pulse.
標(biāo)簽： differential bandwidth simulates system
上傳時間： 2014-01-03
上傳用戶：784533221
WB_BPSK_Analysis.rar:BPSK modulation and link analysis of UWB monocycle and doublet waveforms.Revised 1/2/05-JC.This m file plots the time and frequency waveforms for BPSK 1st and 2nd derivative equations used in UWB system analysis.
標(biāo)簽： WB_BPSK_Analysis modulation and monocycle
上傳時間： 2016-11-12
上傳用戶：邶刖
Basic function to locate and measure the positive peaks in a noisy data sets. Detects peaks by looking for downward zero-crossings in the smoothed third derivative that exceed SlopeThreshold and peak amplitudes that exceed AmpThreshold. Determines, position, height, and approximate width of each peak by least-squares curve-fitting the log of top part of the peak with a parabola.
標(biāo)簽： peaks function positive Detects
上傳時間： 2017-04-26
上傳用戶：彭玖華
This contribution provides functions for finding an optimum parameter set using the evolutionary algorithm of Differential Evolution. Simply speaking: If you have some complicated function of which you are unable to compute a derivative, and you want to find the parameter set minimizing the output of the function, using this package is one possible way to go.
標(biāo)簽： contribution evolutionary functions parameter
上傳時間： 2017-06-03
上傳用戶：海陸空653
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