近年來,隨著DSP技術(shù)的快速發(fā)展,數(shù)字視頻處理技術(shù)得到了越來越廣泛的應(yīng)用。邊緣檢測是是數(shù)字視頻處理中的一項關(guān)鍵技術(shù),而且是進(jìn)行對象檢測和識別的基礎(chǔ)。本文首先分析了當(dāng)前發(fā)展比較成熟的幾種邊緣檢測算法,然后針對基于DSP的數(shù)字視頻處理系統(tǒng)的特點(diǎn)選用Laplacian of Gaussian(LoG)邊緣檢測算法,并在基于DM642的數(shù)字視頻處理系統(tǒng)上實現(xiàn),給出了仿真的結(jié)果。
上傳時間: 2013-11-15
上傳用戶:familiarsmile
在綜合分析諧波勵磁無刷同步發(fā)電機(jī)勵磁控制系統(tǒng)的基礎(chǔ)上,對其勵磁控制策略進(jìn)行了研究,開發(fā)了一套基于DSP( TMS320F2812) 控制的新型柴油發(fā)電機(jī)勵磁控制系統(tǒng),該系統(tǒng)采用參數(shù)自適應(yīng)模糊PID 控制勵磁,選用交流采樣方式實時檢測各信號的瞬時特性,系統(tǒng)仿真結(jié)果以及在1 臺25 kW 工頻柴油發(fā)電機(jī)上的試驗結(jié)果證明了該控制器具有較好的電壓調(diào)節(jié)特性,系統(tǒng)穩(wěn)態(tài)和暫態(tài)性能完全滿足發(fā)電機(jī)對勵磁系統(tǒng)的要求。關(guān)鍵詞:勵磁調(diào)節(jié);模糊PID 控制;數(shù)字信號處理器;交流采樣 Abstract :According to the general analysis of the excitation cont rol system of the harmonious wave excitation brushless synchronous generator and it s characteristics ,a new type of diesel generator excitation cont rol system based on DSP( TMS320F2812) was designed. An adaptive fuzzy PID cont rol of excitation is used in this system. To detect the t ransient characteristics of the signals in a timely manner ,AC sampling was applied.The system simulation result s and the testing result s f rom a 25 kW diesel generator (50 Hz) can prove that the voltage regulation characteristics of the excitation cont rol system are very well ,and both the steadyOstate performance and the t ransient performance of the generator are also good.Key words :excitation cont rol ;fuzzy PID cont rol ;digital signal processor (DSP) ;AC sampling
標(biāo)簽: DSP 柴油發(fā)電機(jī) 勵磁控制 系統(tǒng)研究
上傳時間: 2013-10-29
上傳用戶:fxf126@126.com
load initial_track s; % y:initial data,s:data with noiseT=0.1; % yp denotes the sample value of position% yv denotes the sample value of velocity% Y=[yp(n);yv(n)];% error deviation caused by the random acceleration % known dataY=zeros(2,200);Y0=[0;1];Y(:,1)=Y0;A=[1 T 0 1]; B=[1/2*(T)^2 T]';H=[1 0]; C0=[0 0 0 1];C=[C0 zeros(2,2*199)];Q=(0.25)^2; R=(0.25)^2;
上傳時間: 2014-12-28
上傳用戶:asaqq
This application note covers the design considerations of a system using the performance features of the LogiCORE™ IP Advanced eXtensible Interface (AXI) Interconnect core. The design focuses on high system throughput through the AXI Interconnect core with F MAX and area optimizations in certain portions of the design. The design uses five AXI video direct memory access (VDMA) engines to simultaneously move 10 streams (five transmit video streams and five receive video streams), each in 1920 x 1080p format, 60 Hz refresh rate, and up to 32 data bits per pixel. Each VDMA is driven from a video test pattern generator (TPG) with a video timing controller (VTC) block to set up the necessary video timing signals. Data read by each AXI VDMA is sent to a common on-screen display (OSD) core capable of multiplexing or overlaying multiple video streams to a single output video stream. The output of the OSD core drives the DVI video display interface on the board. Performance monitor blocks are added to capture performance data. All 10 video streams moved by the AXI VDMA blocks are buffered through a shared DDR3 SDRAM memory and are controlled by a MicroBlaze™ processor. The reference system is targeted for the Virtex-6 XC6VLX240TFF1156-1 FPGA on the Xilinx® ML605 Rev D evaluation board
標(biāo)簽: XAPP 740 AXI 互聯(lián)
上傳時間: 2013-11-14
上傳用戶:fdmpy
針對Virtex-6 給出了HDL設(shè)計指南,其中,賽靈思為每個設(shè)計元素給出了四個設(shè)計方案元素,并給出了Xilinx認(rèn)為是最適合你的解決方案。這4個方案包括:實例,推理,CORE Generator或者其他Wizards,宏支持.
標(biāo)簽: Virtex HDL 設(shè)計指南
上傳時間: 2013-11-07
上傳用戶:gy592333
本文對數(shù)字基帶信號脈沖成型濾波的應(yīng)用、原理及實現(xiàn)進(jìn)行了研究。首先介紹了數(shù)字成型濾波的應(yīng)用意義并分析了模擬和數(shù)字兩種硬件實現(xiàn)方法,接著介紹了成形濾波器設(shè)計所需要MATLAB軟件,以及利用ISE system generator在FPGA上進(jìn)行濾波器實現(xiàn)的優(yōu)勢。文中給出了成形濾波函數(shù)的數(shù)學(xué)模型,討論了幾種常用成形濾波函數(shù)的傳輸特性以及對傳輸系統(tǒng)信號誤碼率的影響。然后介紹了本次設(shè)計中使用到的數(shù)字成形濾波器設(shè)計的幾種FIR濾波器結(jié)構(gòu)。把各種設(shè)計方案進(jìn)行仿真,比較仿真結(jié)果,最后根據(jù)實際應(yīng)用的情況并結(jié)合設(shè)計仿真中出現(xiàn)的問題進(jìn)行分析,得出各種設(shè)計結(jié)構(gòu)的優(yōu)缺點(diǎn)以及適合應(yīng)用的場合。
標(biāo)簽: FPGA 數(shù)字 成形 濾波器設(shè)計
上傳時間: 2013-10-18
上傳用戶:aesuser
This application note covers the design considerations of a system using the performance features of the LogiCORE™ IP Advanced eXtensible Interface (AXI) Interconnect core. The design focuses on high system throughput through the AXI Interconnect core with F MAX and area optimizations in certain portions of the design. The design uses five AXI video direct memory access (VDMA) engines to simultaneously move 10 streams (five transmit video streams and five receive video streams), each in 1920 x 1080p format, 60 Hz refresh rate, and up to 32 data bits per pixel. Each VDMA is driven from a video test pattern generator (TPG) with a video timing controller (VTC) block to set up the necessary video timing signals. Data read by each AXI VDMA is sent to a common on-screen display (OSD) core capable of multiplexing or overlaying multiple video streams to a single output video stream. The output of the OSD core drives the DVI video display interface on the board. Performance monitor blocks are added to capture performance data. All 10 video streams moved by the AXI VDMA blocks are buffered through a shared DDR3 SDRAM memory and are controlled by a MicroBlaze™ processor. The reference system is targeted for the Virtex-6 XC6VLX240TFF1156-1 FPGA on the Xilinx® ML605 Rev D evaluation board
標(biāo)簽: XAPP 740 AXI 互聯(lián)
上傳時間: 2013-11-23
上傳用戶:shen_dafa
針對Virtex-6 給出了HDL設(shè)計指南,其中,賽靈思為每個設(shè)計元素給出了四個設(shè)計方案元素,并給出了Xilinx認(rèn)為是最適合你的解決方案。這4個方案包括:實例,推理,CORE Generator或者其他Wizards,宏支持.
標(biāo)簽: Virtex HDL 設(shè)計指南
上傳時間: 2015-01-02
上傳用戶:pinksun9
本文對數(shù)字基帶信號脈沖成型濾波的應(yīng)用、原理及實現(xiàn)進(jìn)行了研究。首先介紹了數(shù)字成型濾波的應(yīng)用意義并分析了模擬和數(shù)字兩種硬件實現(xiàn)方法,接著介紹了成形濾波器設(shè)計所需要MATLAB軟件,以及利用ISE system generator在FPGA上進(jìn)行濾波器實現(xiàn)的優(yōu)勢。文中給出了成形濾波函數(shù)的數(shù)學(xué)模型,討論了幾種常用成形濾波函數(shù)的傳輸特性以及對傳輸系統(tǒng)信號誤碼率的影響。然后介紹了本次設(shè)計中使用到的數(shù)字成形濾波器設(shè)計的幾種FIR濾波器結(jié)構(gòu)。把各種設(shè)計方案進(jìn)行仿真,比較仿真結(jié)果,最后根據(jù)實際應(yīng)用的情況并結(jié)合設(shè)計仿真中出現(xiàn)的問題進(jìn)行分析,得出各種設(shè)計結(jié)構(gòu)的優(yōu)缺點(diǎn)以及適合應(yīng)用的場合。
標(biāo)簽: FPGA 數(shù)字 成形 濾波器設(shè)計
上傳時間: 2013-10-22
上傳用戶:tyler
隨著系統(tǒng)設(shè)計復(fù)雜性和集成度的大規(guī)模提高,電子系統(tǒng)設(shè)計師們正在從事100MHZ以上的電路設(shè)計,總線的工作頻率也已經(jīng)達(dá)到或者超過50MHZ,有一大部分甚至超過100MHZ。目前約80% 的設(shè)計的時鐘頻率超過50MHz,將近50% 以上的設(shè)計主頻超過120MHz,有20%甚至超過500M。當(dāng)系統(tǒng)工作在50MHz時,將產(chǎn)生傳輸線效應(yīng)和信號的完整性問題;而當(dāng)系統(tǒng)時鐘達(dá)到120MHz時,除非使用高速電路設(shè)計知識,否則基于傳統(tǒng)方法設(shè)計的PCB將無法工作。因此,高速電路信號質(zhì)量仿真已經(jīng)成為電子系統(tǒng)設(shè)計師必須采取的設(shè)計手段。只有通過高速電路仿真和先進(jìn)的物理設(shè)計軟件,才能實現(xiàn)設(shè)計過程的可控性。傳輸線效應(yīng)基于上述定義的傳輸線模型,歸納起來,傳輸線會對整個電路設(shè)計帶來以下效應(yīng)。 · 反射信號Reflected signals · 延時和時序錯誤Delay & Timing errors · 過沖(上沖/下沖)Overshoot/Undershoot · 串?dāng)_Induced Noise (or crosstalk) · 電磁輻射EMI radiation
標(biāo)簽: 高速電路 傳輸線 效應(yīng)分析
上傳時間: 2013-11-05
上傳用戶:tzrdcaabb
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