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来自IEEE PES数据库的电能质量扰动数据源
来自IEEE PES数据库的电能质量扰动数据源，是研究验证电能质量分析方法的重要资源。
- 2020-12-08下载
- 积分：1
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matlab程序源码及报告word版--基于小波包分析和神经网络的滚动轴承故障诊断
滚动轴承的故障检测、分类源代码，且配合有word版大报告。图文并茂具体做的内容是：针对滚动轴承这种非平稳振动信号采用的小波包分解的方法来检测故障的存在，运用神经网络来实现故障的分类，还结合D-S理论融合了多个传感器的诊断结果，提高了故障诊断的准确性并通过实验仿真证实。
- 2020-11-28下载
- 积分：1
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基于监控视频的前景目标提取matlab
有程序和资料。17年华为杯数学建模D题，针对问题一，在静止背景条件下，提取运动前景目标轮廓，首先处理视频，生成单帧数据，针对不含纯背景帧的视频采用帧间差分法，对含背景帧的视频数据采用背景差分法。两种方法都可以准确提取静止背景下的前景目标轮毂，最后进行形态学的补充处理，达到预期的效果。针对问题二，分析动态背景每一帧之间都大面积的不同，因此使用帧差法的结果会出现大量的噪点。采取混合高斯模型(GMM)对动态的背景进行建模，采用一定帧数的图像来训练模型，从而实现实时更新的背景模型，过滤掉背景变化对目标提取的影响，可以准确提取前景目标。针对问题三，考虑摄像头抖动造成图像的变化，因此考虑首先去抖动，对
- 2020-12-05下载
- 积分：1
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认知无线电中的双门限能量检测matlab仿真代码
基于双门限的能量检测算法，实现在各种信道环境下的仿真
- 2020-06-29下载
- 积分：1
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无线通信系统中功率控制博弈论算法的 MATLAB 实现.zip
【实例简介】无线通信系统中经典的功率控制博弈论算法matlab实现。
(The classical game theory algorithm of power control in wireless communication system is realized by MATLAB.)
- 2021-11-26 00:31:53下载
- 积分：1
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英飞凌IGBT驱动培训资料
在电力电子装置中的一个重要组成部分,输入连接到控制电路的PWM信号输出端，输出连接到装置各IGBT的门极和发射极，将装置中的控制电路产生的数字PWM信号进行隔离传输和电平转换和功率放大,实现控制电路对IGBT进行开通和关断动作的控制，从而实现装置的功率变换功能。InfineontechnologiesIGBT Gate Drive: Power Suppliesa Gate driving voltage for IGBT+15Vturn-on is normally +15VDriver>□1a Gate driving voltage for IGBTOVturn-off can be oV or negativeWith Single Power Supply5V to-15V)a Negative gate driving voltage+15Vhelps IGBt switch off fasterremain in off state but itDriverneeds dual power suppliesOVWhether to use oV or negativegate driving voltage depends15VWith Dual Power Supplieson the requirement on costZH Liang - Al APperformance05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: InterfaceOpto-couplers is commonly used as interfacingdevices for applications where both signaltransmission and potential isolation are requiredOpto-couplers offers reliable isolation between IGBT(high-potential)& micro-controller(low-potential)Opto-couplers has long signal delay(us)and isexpensiveIsolation +VDpCCMicroDrivercontrollerZH Liang - Al AP05Dec2003Page 6for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveStandard configuration: 2 drivers, 2 power supplies, 2 opto-couplersAdvantages: standard, reliableDisadvantages: using opto-couplers, higher system costIsolation +VDDlCC1DriverCC1MicrocontrollerDD2+VCC2DriverCC2ZH Liang - Al AP05Dec2003Page 7for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveIn half-bridge IGBT drive, opto-couplers offer two functions(1)safety isolation &(2) shifting the potential of the gatesignal from uc potential to high-side potentialIf safety isolation between IGBT& micro-controller is notneeded, then"Level Shift" can replace opto-coupling andrealize function(2)OptoHigh-sideHigh-sidecouplerDriverIGBTMicro-Opto-LoW-sideLow-sidecontrollercouplerDriverIGBTZH Liang - Al AP05Dec2003Page 8for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive Level shiftI FeaturesHVc(600V/1200V)沿PULSERFILTERShort Signal DelayPULSE■Cost- effectiveGEN■ No Safety Isolationevel Shift Half-bridge DriverI BenefitHigh-side““°IGBTO Saving Opto-couplersLevel(lower system costShiftMicro● Wider range ofcontrollerLevelLow-side■■■■■直■口m留■Switching FrequencyShiftIGBT(higher flexibility)ZH Liang - Al AP05Dec2003Page 9for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: CLTNEWO CLT-Coreless Transformer (for signal transmissionu Coils(Primary Secondary Side)realized on SiliconO Short Signal Delay (allowing high or low switching frequencyu Lower Cost(compared to 1200V level-shift driver日 Safety IsolationCLT Half-bridge DriverHigh-sideCLT Single DriverIGBTCLTMicro-controllerCLTIGBTMicro-controllerLoW-sideIGBTZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strapBoot-strap circuit includes only a diode and a capacitora In half-bridge drive, the boot-strap circuit can replace the high-sidepower supply and make single-supply operation possibleWhen the low-side IGBT (or FWD)is on, the diode is forwardbiased and the capacitor is charged by the low-side power supplyvia the low-side IGBT and stores the energyWhen the low-side IGBt(and FWD)is OFF, the diode is reversebiased and blocks the dc-bus voltage to protect the low-sidecircuit. Meanwhile, the capacitor supplies energy to the high-sidedriverThe boot-strap capacitance should be high enough to keep thesupply voltage stable Capacitance needed can be calculatedbased on the working conditions and device parametersZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strap circuitConventional2心菲*|■3 high-side power supplies■1|oW- side power supplyUsing boot-strap circuit心体心心●3 diodes& capacitorso 1 low-side power supplyFeaturesa Diode: ultra-fast recoverya Capacitor: general-purposed ITAa Dependent on low-side IGBTBenefitsSaving 3 PS(transformer cost)22ZH Liang - Al AP05Dec2003Reducing wiring connectionPage 12for internal use onlyInfineon Technologies Asia Pacific
- 2020-12-11下载
- 积分：1
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基于四元数反馈的卫星姿态控制系统仿真模型建立.pdf
【实例简介】基于四元数反馈的卫星姿态控制系统仿真模型建立
- 2021-12-03 00:35:04下载
- 积分：1
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HelixMP3Decoder及中文移植手册
Helix MP3 解码，全定点运算，可广泛移植多种嵌入式平台，包含中文移植手册，可快速掌握移植接口，可选择编译 ARM 平台汇编优化，仅支持MPEG-1 Audio Layer III。
- 2020-12-07下载
- 积分：1
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一种新的改进粒子滤波算法
标准粒子滤波算法存在的最大问题是粒子退化,针对这一问题,提出了一种改进的粒子滤波算法,该算法将无迹卡尔曼滤波算法(UKF)、混合遗传模拟退火算法和基本粒子滤波算法相结合,运用无迹卡尔曼滤波算法获得重要性函数,提高了粒子的使用效率;运用混合遗传模拟退火算法的进化思想,提高了粒子的多样性.仿真结果表明,新算法很好地解决了基本粒子滤波算法存在的粒子退化问题,提高了系统的滤波精度和稳定性(在信噪比为16 dB时,精度提高80%以上),较好地抑制了噪声的干扰.
- 2021-05-06下载
- 积分：1
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三相桥式有源逆变仿真
三相有源逆变仿真 matlab仿真simulink仿真实验
- 2020-12-05下载
- 积分：1
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