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Study on the Concentration Inversion of NO &NO2 Gas from the Vehicle Exhaust Based on Weighted PLS 预览
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作者 Kai Zhang Yujun Zhang +7 位作者 Kun You Yibing Lu Qixing Tang Ying He Guohua Liu Boqiang Fan Dongqi Yu Wenqing Liu 《光学与光子学期刊(英文)》 2017年第8期106-115,共10页
It becomes a key technology to measure the concentration of the vehicle exhaust components with the absorption spectra. But because of the overlap of gas absorption bands, how to separate the absorption information of... It becomes a key technology to measure the concentration of the vehicle exhaust components with the absorption spectra. But because of the overlap of gas absorption bands, how to separate the absorption information of each component gas from the mixed absorption spectra has become the key point to restrict the precision of the optical detection method. In this paper, the ex-perimental platform for the absorption spectrum of vehicle exhaust components has been established. Based on the ultraviolet absorption spectra measured with the platform of exhaust gas NO & NO2, the concentration regression model for the two components has been established with weighted partial least squares regression (WPLS). Finally the each spectral characteristic information of NO & NO2 gas has been separated and the concentration of each corresponding component has been reversed successfully. 展开更多
关键词 Absorption Spectra NO & NO2 GAS WEIGHTED Partial Least SQUARES Regression Concentration INVERSION
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小流域洪水模拟方法对比研究 预览
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作者 苏万敏 王丕国 +2 位作者 何斌 张玉君 梁国华 《水资源研究》 2016年第3期228-236,共9页
小流域洪水陡涨陡落,又因缺乏长系列的实测水文资料,其洪水预报方案编制困难。针对该问题,以北方半湿润半干旱地区的冰峪沟小流域为例,在分析该流域气候、洪水特点以及资料获取情况的基础上,结合国内常用洪水预报模型的适用情况,选取大... 小流域洪水陡涨陡落,又因缺乏长系列的实测水文资料,其洪水预报方案编制困难。针对该问题,以北方半湿润半干旱地区的冰峪沟小流域为例,在分析该流域气候、洪水特点以及资料获取情况的基础上,结合国内常用洪水预报模型的适用情况,选取大伙房模型和HEC-HMS模型开展冰峪沟小流域的洪水模拟研究。模拟结果表明:当前期土壤较干旱、降雨强度较大时,易于发生超渗产流,大伙房模型和HEC-HMS模型模拟产汇流的效果都较好,均可用于指导小流域进行洪水预报预警。但相比而言,大伙房模型模拟产汇流的平均误差较小,对于具有长系列实测水文数据的半干旱半湿润地区小流域,可优先选择大伙房模型进行洪水预报。而HEC-HMS模型在实测水文资料较缺乏的小流域更具有推广价值。 展开更多
关键词 小流域 洪水模拟 大伙房模型 HEC-HMS模型
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A Decoupling Control Model on Perturbation Method for Twin-Roll Casting Magnesium Alloy Sheet 被引量:1
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作者 Wenyu Zhang Dongying Ju +3 位作者 Hongyang Zhao Xiaodong Hu Yao Yao Yujun Zhang 《材料科学技术学报:英文版》 SCIE EI CAS CSCD 2015年第5期517-522,共6页
To better understand the twin-roll casting process,based on the analysis of the solidification phenomenon,the geometry shape of the molten metal pool,the continuity of metal and the balance of energy and momentum,five... To better understand the twin-roll casting process,based on the analysis of the solidification phenomenon,the geometry shape of the molten metal pool,the continuity of metal and the balance of energy and momentum,five critical partial equations were established separately including the equations of pool level,solidification process,roll separating force,roll gap and casting speed.Meanwhile,to obtain a uniform sheet thickness and keep a constant roll separating force,a decoupling control model was built on the perturbation method to eliminate the interference of process parameters.The simulation results show that the control model is valuable to quickly and accurately determine the control parameters.Moreover,Mg alloy sheets with high quality were cast by applying this model. 展开更多
关键词 TWIN-ROLL CASTING DECOUPLING CONTROL model Perturb
X-ray fluorescence spectra quantitative analysis based on characteristic spectra optimization of partial least-squares method
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作者 章炜 段连飞 +3 位作者 张罗政 张玉钧 凌六一 杨允军 《中国光学快报:英文版》 SCIE EI CAS CSCD 2014年第A02期144-148,共5页
关键词 光谱定量分析 偏最小二乘法 X射线荧光 优化 特性 误差平方和 XRF光谱 交叉验证
Measurement of algae PSII photosynthetic parameters using high-frequency excitation flashes 被引量:1
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作者 石朝毅 张玉钧 +7 位作者 殷高方 赵南京 段静波 余晓娅 肖雪 甘婷婷 方丽 刘文清 《中国光学快报:英文版》 SCIE EI CAS CSCD 2014年第8期1-4,共4页
We establish a system to measure the functional absorption cross section of photosystem II(PSII)(σPSII)and maximum quantum yield of photochemistry in PSII(Fv/Fm).The system utilizes a sequence of highfrequency excita... We establish a system to measure the functional absorption cross section of photosystem II(PSII)(σPSII)and maximum quantum yield of photochemistry in PSII(Fv/Fm).The system utilizes a sequence of highfrequency excitation flashes at microsecond intervals to induce a microsecond-level fluorescence yield curve.ParametersσPSII and Fv/Fm are calculated by fitting the curve using nonlinear regression.Experimental results show that the relative standard deviation(RSD)of the system is less than 3%,and the correlation coefficient of Fv/Fm values measured by this system and those measured by pulse amplitude modulation method is 0.950. 展开更多
关键词 PSII 参数测量 高频激励 光合 闪烁 藻类 相对标准偏差 脉冲幅度调制
Studies on Extracting Microcystin-Lr from Microcystis Aeruginosa by Water Bath 预览
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作者 Li Fang Wenqing Liu +7 位作者 Nanjing Zhao Jingbo Duan Zhigang Wang Yujun Zhang Xue Xiao Jing Liu Gaofang Yin Chaoyi Shi 《环境保护(英文)》 2013年第1期70-73,共4页
Different temperatures of water bath was used to extract the intracellular microcystin-LR(MC-LR) of Microcystis aeruginosa. Researching the extraction efficiency under the suitable temperature, so that it could find o... Different temperatures of water bath was used to extract the intracellular microcystin-LR(MC-LR) of Microcystis aeruginosa. Researching the extraction efficiency under the suitable temperature, so that it could find out the best temperature and time for extracting MC-LR from Microcystis aeruginosa cells. Five equal Microcystis aeruginosa was used to find out the best temperature, extracting at 60℃, 70℃, 80℃, 90℃ and 100℃ for 15 minutes, respectively. Results showed that the content of MC-LR extracted with the water under 100℃ was the highest. But meanwhile, the type and the content of impurities was the highest, too. In addition, another six equal Microcystis aeruginosa was extract with the water under 100℃ for 5min, 10 min, 15 min, 20 min, 25 min and 30 min respectively. It was proved that 20 minutes was enough for extracting MC-LR from Microcystis aeruginosa, no long time was needed. 展开更多
关键词 BOILING Water BATH EXTRACT MICROCYSTIN-LR
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Compact cylindrical multipass cell for laser absorption spectroscopy 被引量:1
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作者 沈超 张玉钧 倪家正 《中国光学快报:英文版》 SCIE EI CAS CSCD 2013年第9期33-37,共5页
A compact multipass cell with low fringes and high thermal stability is described.This cell is formed by two twisted cylindrical mirrors.The optical parameters are determined based on the selection criteria,which incl... A compact multipass cell with low fringes and high thermal stability is described.This cell is formed by two twisted cylindrical mirrors.The optical parameters are determined based on the selection criteria,which include mirror filling efficiency,interference fringes,and pattern stability.With a pattern of 174 passes,this cell gives a 22-m path length in a volume of 0.55 L.The results of an absorption measurement of oxygen at 13 091.7 cm 1show that the fringe noise is lower than 6.54×10 4.The maximum allowed temperature change to keep the beam from exiting is 33 K,which indicates high stability against thermal drift. 展开更多
关键词 多通道 紧凑型 光谱技术 激光吸收 单元 圆柱形 热稳定性 干扰条纹
FEM ANALYSIS FOR INFLUENCES OF A FAULT ON COUPLED T-H-M-M PROCESS IN DUAL-POROSITY ROCK MASS 被引量:1
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作者 Yujun Zhang Chaoshuai Yang Gang Xu 《固体力学学报:英文版》 SCIE EI 2012年第6期651-662,共12页
为在的盒子象差错为高级放射性的原子废物在一个仓库的近的域里在包围岩石团以内存在一样的大地质的结构,浸透不饱和的无所不在关节的岩石质量的双孔的媒介的一个种联合 thermo-hydro-mechanical-migratory 模型被建立。在现在的模型... 为在的盒子象差错为高级放射性的原子废物在一个仓库的近的域里在包围岩石团以内存在一样的大地质的结构,浸透不饱和的无所不在关节的岩石质量的双孔的媒介的一个种联合 thermo-hydro-mechanical-migratory 模型被建立。在现在的模型,渗出物域和集中域是双的,但是压力域和温度域是集合的单身者,和影响,空格,角度,连续性比率,媒介的组成的关系上的破裂的僵硬能被考虑。同时,有限元素方法的一个二维的节目被开发。拿在是不饱和的一个岩石团定位的一个假想原子浪费仓库是的双孔的媒介一个计算例子,为联合的 thermo-hydro-mechanical-migratory 的女性的分析在有或没有一个差错,和温度为盒子漏的放射性的核种的条件下面被执行,毛孔压力,流动速度,在岩石团中的核种集中和主要压力被调查。在差错的破裂水流动的结果表演是基本上沿着差错方向,和它的流动速度比在岩石质量中的破裂水的高几乎三个数量级;没有差错,在差错的核种集中也比那高得多,并且核种更快沿着差错移动;而且,差错在岩石团中在毛孔压力和主要压力上有明显的影响。 展开更多
关键词 双重孔隙介质 故障影响 节理岩体 有限元分析 耦合模型 放射性核素 孔隙水压力 放射性核废料
Quantum cascade laser-based spectrometer for high sensitive measurements of trace gases in air
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作者 汤媛媛 刘文清 +4 位作者 阚瑞峰 张玉钧 陈东 张帅 阮俊 《中国光学快报:英文版》 SCIE EI CAS CSCD 2012年第4期 33-35,共3页
A quantum cascade(QC)laser-based spectrometer is developed to measure trace gases in air.The proposed spectrometer is tested for N2O,and the results presented in this letter.This system takes advantage of recent techn... A quantum cascade(QC)laser-based spectrometer is developed to measure trace gases in air.The proposed spectrometer is tested for N2O,and the results presented in this letter.This system takes advantage of recent technology in QC lasers by utilizing intra-pulse scan spectroscopy,which allows high sensitive measurement.Without calibration gases,the gas concentration can be calculated with scan integration and the corresponding values from the HITRAN04 database.By analyzing the Allan variance,a detection limit of 2 ppb is obtained.Continuous measurement of N2O sampled from ambient air shows the applicability of the proposed system for the field measurements of gases of environmental concern. 展开更多
关键词 量子级联激光器 激光光谱仪 微量气体 连续测量 空气采样 高灵敏度 测量系统 方差分析
新型龙胆酸衍生物的合成及其抑制酪氨酸酶活性研究 被引量:2
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作者 宋长伟 熊丽丹 +5 位作者 王裕军 张南 李霞 李颖 李利 尹述凡 《有机化学》 SCIE CAS CSCD 北大核心 2012年第9期1753-1758,共6页
为发现新型的关白活性化合物,以龙胆酸甲酯、卤代烃和a-羟基酸乙酯为原料,合成了10个未见文献报道的2-羟基-5-烷(H)氧基苯甲酸酯类衍生物(3a,3b和6a-6h),其结构经^1HNMR,IR,MS和HRMS确认.仞步生物活性测试结果表明6a,6b,6e... 为发现新型的关白活性化合物,以龙胆酸甲酯、卤代烃和a-羟基酸乙酯为原料,合成了10个未见文献报道的2-羟基-5-烷(H)氧基苯甲酸酯类衍生物(3a,3b和6a-6h),其结构经^1HNMR,IR,MS和HRMS确认.仞步生物活性测试结果表明6a,6b,6e年u6f具有较强的抑制酪氨酸酶活性,进一步药理实验表明绎取代改造后的6a-6h,其毒性和光学毒性都相对龙胆酸甲酯和氢础更低. 展开更多
关键词 美白 龙胆酸甲酯 酪氨酸酶 毒性 光学毒性
Embryonic expression and evolutionary analysis of the amphioxus Dickkopf and Kremen family genes
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作者 Yujun Zhang Bingyu Mao 《遗传学报:英文版》 SCIE CAS CSCD 2010年第9期637-645,共9页
表明禁止者 Dickkopf1 (Dkk1 ) 的分泌 Wnt 在脊椎动物头正式就职起关键作用。它有在 Wnt 抑制的 Dkk1 的受体 Kremen synergizes。这里,我们在文昌鱼(Branchiostoma belcheri ) 执行了表示和 Dkk 和 Kremen 基因的功能的研究。在胚胎... 表明禁止者 Dickkopf1 (Dkk1 ) 的分泌 Wnt 在脊椎动物头正式就职起关键作用。它有在 Wnt 抑制的 Dkk1 的受体 Kremen synergizes。这里,我们在文昌鱼(Branchiostoma belcheri ) 执行了表示和 Dkk 和 Kremen 基因的功能的研究。在胚胎、幼虫的开发期间, BbDkk1/2/4 在以后的 mesoendoderm,前面的体的中层和咽头的区域被表示。它的表示变得在幼虫的阶段在左边上限制了为咽头的区域。在 45 h 幼虫, BbDkk1/2/4 在服的泡明确地被表示。BbDkk3 仅仅在中间肠的区域在幼虫的阶段被检测。七 Kremen 相关基因在佛罗里达文昌鱼(Branchiostoma floridae ) 的染色体被识别,在 4 脚手架聚类,并且被指明 Kremen1-4 和象 Kremen 一样 1-3 分别地。在 B。belcheri, Kremen1 强烈在早开发期间在 mesoendoderm 被表示, Kremen3 在幼虫的咽头的区域在点不均匀地被表示。在酶记者试金, BbDkk1/2/4 能强烈禁止 Wnt 发信号 BbDkk3, BbKremen1 和 BbKremen3 不能。没有合作效果在文昌鱼 Dkk1/2/4 和 Kremens 之间被观察,建议在 Dkk 和 Kremen 之间的相互作用以后多半在进化期间发源。 展开更多
关键词 基因进化 文昌鱼 胚胎 家族 WNT 脊椎动物 抑制作用 幼体发育
Characterization of coal oil using three-dimensional excitation and emission matrix fluorescence spectroscopy
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作者 肖雪 张玉钧 +3 位作者 王志刚 金丹 殷高方 刘文清 《中国光学快报:英文版》 SCIE EI CAS CSCD 2009年第1期85-87,共3页
<正>Three-dimensional(3D)excitation-emission matrix(EEM)fluorescence spectroscopy is applied to charac- terize the coal oil.The results show that the 3D fluorescence spectra of coal oil in aqueous solution mainl... <正>Three-dimensional(3D)excitation-emission matrix(EEM)fluorescence spectroscopy is applied to charac- terize the coal oil.The results show that the 3D fluorescence spectra of coal oil in aqueous solution mainly have one broad peak.This peak is identified at the excitation/emission wavelengths of 270/290 nm.The relation between the fluorescence intensity and the concentration of coal oil is also studied.When the concentration lies between 2-2000 ppm,the relation between the fluorescence intensity and the concen- tration of coal oil is well linear.The nature of solvents significantly affects the EEM fluorescence of coal oil. 展开更多
关键词 煤油 激励发射 荧光光谱 荧光强度
Measurements of aerosol distribution by an elastic-backscatter lidar in summer 2008 in Beijing 被引量:1
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作者 陈臻懿 刘文清 +3 位作者 张玉钧 赵南京 何俊峰 阮俊 《中国光学快报:英文版》 SCIE EI CAS CSCD 2009年第9期753-755,共3页
<正> Elastic lidar observations of profiles of the aerosol extinction, backscattering coefficients, and the lidarratio have been performed in Beijing. The elastic lidar transmitts wavelengths of 532 and 355 nm. ... <正> Elastic lidar observations of profiles of the aerosol extinction, backscattering coefficients, and the lidarratio have been performed in Beijing. The elastic lidar transmitts wavelengths of 532 and 355 nm. Themeasurement altitude can reach up to 6 km. The similarity of the extinction and backscattering profilessuggests a close relation between the mean transmission and reflection properties. The lidar ratio on July22, 2008 varied from 10 to 30 sr with the mean value of 20 sr. The profiles of the aerosol propertiesindicate the cirrus at 6-km altitude and a well-mixed boundary layer from July 22 to 24, 2008. Thedetected boundary layer also agrees well with the high and stable ozone concentration obtained from thedifferential optical absorption spectroscopy (DOAS) system. 展开更多
关键词 激光雷达探测 大气气溶胶 弹性散射 分布测量 北京 差分光学吸收光谱 差分吸收光谱法 夏天
An approach of open-path gas sensor based on tunable diode laser absorption spectroscopy 被引量:1
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作者 夏慧 刘文清 +6 位作者 张玉钧 阚瑞峰 王敏 何莹 崔益本 阮俊 耿辉 《中国光学快报:英文版》 SCIE EI CAS CSCD 2008年第6期437-440,共4页
<正>Tunable diode laser absorption spectroscopy(TDLAS)is a new method to detect trace-gas qualitatively or quantificationally based on the scan characteristic of the diode laser to obtain the absorption spectros... <正>Tunable diode laser absorption spectroscopy(TDLAS)is a new method to detect trace-gas qualitatively or quantificationally based on the scan characteristic of the diode laser to obtain the absorption spectroscopy in the characteristic absorption region.A time-sharing scanning open-path TDLAS system using two near infrared distributed feedback(DFB)tunable diode lasers is designed to detect CH_4 and H_2S in leakage of natural gas.A low-cost Fresnel lens is used in this system as receiving optics which receives the laser beam reflected by a solid corner cube reflector with a distance of up to about 60 m.High sensitivity is achieved by means of wavelength-modulation spectroscopy with second-harmonic detection.The minimum detection limits of 1.1 ppm·m for CH_4 and 15 ppm·m for H_2S are demonstrated with a total optical path of 120 m.The simulation monitoring experiment of nature gas leakage was carried out with this system. According to the receiving light efficiency of optical system and detectable minimum light intensity of detection,the detectable optical path of the system can achieve 1-2 km.The sensor is suitable for natural gas leakage monitoring application. 展开更多
关键词 激光二极管 气体敏感器 激光吸收光谱 吸收光谱法
Retrieval of ultraviolet skylight radiances and O3 slant column densities from balloon-borne limb spectrometer
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作者 司福祺 谢品华 +4 位作者 刘诚 刘建国 张玉钧 窦科 刘文清 《中国光学快报:英文版》 SCIE EI CAS CSCD 2008年第7期541-543,共3页
<正>With a novel light-weight and absolutely calibrated ultraviolet (UV) spectrometer,UV skylight radiances and 03 slant column densities are measured by balloon-borne limb measurements in Xinjiang area,China. U... <正>With a novel light-weight and absolutely calibrated ultraviolet (UV) spectrometer,UV skylight radiances and 03 slant column densities are measured by balloon-borne limb measurements in Xinjiang area,China. UV skylight radiances measured at the height of 31 km are compared with the results from Modtran in the wavelength range from 290 to 420 nm.O_3 slant column densities are derived from radiance spectra in the Huggins bands (320-335 nm) using differential optical absorption spectroscopy method.And the parameter exhibits a good correlation with the same value simulated by radiative transfer model (Tracy). The O_3 profile simultaneously measured by an O_3 sonde is used as input in Tracy calculations.The O_3 sonde is launched on the same balloon. 展开更多
关键词 紫外线 臭氧 分光计 波长测量
Fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy 被引量:2
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作者 陈东 刘文清 +5 位作者 张玉钧 刘建国 阚瑞峰 王敏 方曦 崔益本 《中国光学快报:英文版》 SCIE EI CAS CSCD 2007年第2期121-124,共4页
<正>Tunable diode laser based gas detectors are now being used in a wide variety of applications for safety and environmental interest. A fiber-distributed multi-channel open-path H2S sensor based on tunable dio... <正>Tunable diode laser based gas detectors are now being used in a wide variety of applications for safety and environmental interest. A fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy (TDLAS) is developed, the laser used is a telecommunication near infrared distributed feed-back (DFB) tunable diode laser, combining with wavelength modulation spectroscopy technology, a detection limit of 20 ppm·m is demonstrated. Multi-channel detection is achieved by combining optical fiber technique. An on-board reference cell provides on-line sensor calibration and almost maintenance-free operation. The sensor is suitable for large area field H2S monitoring application. 展开更多
关键词 可调谐二极管激光吸收光谱学 硫化氢气体探测器 H2S传感器 光纤分布式 多信道探测
A high sensitivity spectrometer with tunable diode laser for ambient methane monitoring 被引量:3
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作者 阚瑞峰 刘文清 +5 位作者 张玉钧 刘建国 王敏 陈东 陈玖英 崔益本 《中国光学快报:英文版》 SCIE EI CAS CSCD 2007年第1期54-57,共4页
<正>Tunable diode laser absorption spectroscopy (TDLAS) has been widely employed in atmospheric trace gases detection. In the measurement of these trace gases, harmonic detection combined with a multi-pass white... <正>Tunable diode laser absorption spectroscopy (TDLAS) has been widely employed in atmospheric trace gases detection. In the measurement of these trace gases, harmonic detection combined with a multi-pass white cell could remarkably enhance the detection sensitivity. In this paper, a portable TDLAS system built specifically for long time monitoring methane in the atmosphere is introduced. The detection limit is below 100 ppb that is enough for the monitoring of ambient methane, and the long time monitoring results obtained in Beijing are given, which is well coincident with that of the Fourier transform infrared (FTIR) spectroscopy. 展开更多
关键词 甲烷监测 可调二极管激光器 高灵敏度分光计 环境气体监测
Applications of a tunable diode laser absorption spectrometer in monitoring greenhouse gases 被引量:3
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作者 王敏 张玉钧 +8 位作者 刘建国 刘文清 阚瑞峰 王铁栋 陈东 陈玖英 王晓梅 夏慧 方曦 《中国光学快报:英文版》 SCIE EI CAS CSCD 2006年第6期363-365,共3页
<正>Tunable diode laser absorption spectroscopy (TDLAS) is a powerful technique to measure trace gas, which can provide high sensitivity, high selectivity, and fast time response. A brief description of our inst... <正>Tunable diode laser absorption spectroscopy (TDLAS) is a powerful technique to measure trace gas, which can provide high sensitivity, high selectivity, and fast time response. A brief description of our instruments with room-temperature near infrared tunable diode laser designed to measure greenhouse gas (i.e., CH4, CO2) in the ambient air is presented. A multiple-reflection cell and the second harmonic detection technique are used to lower the detection limit. The detection limit of the instrument is below 100 ppbv for CH4 and 10 ppmv for CO2, which is enough to the measurements of ambient CH4 and CO2. The instruments have been used to monitor the methane and carbon dioxide of the ambient air in a long time in Fengtai, Beijing. The results of measurement are shown and discussed in this paper. 展开更多
关键词 可调二极管激光吸收谱仪 TDLAS 温室气体 监视 第二谐波探测技术
Large scale gas leakage monitoring with tunable diode laser absorption spectroscopy 被引量:4
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作者 阚瑞峰 刘文清 +5 位作者 张玉钧 刘建国 王敏 陈东 陈玖英 崔益本 《中国光学快报:英文版》 SCIE EI CAS CSCD 2006年第2期116-118,共3页
<正>Tunable diode laser absorption spectroscopy (TDLAS) has been widely employed in atmospheric trace gases detecting and industrial control due to its high sensitivity, selectivity, and rapidity of response. An... <正>Tunable diode laser absorption spectroscopy (TDLAS) has been widely employed in atmospheric trace gases detecting and industrial control due to its high sensitivity, selectivity, and rapidity of response. An open path TDLAS system is developed for monitoring large scale methane leakage around the oil refinery. The tunable distributed feedback (DFB) diode laser emits at 1.65 fun. In order to enhance the sensitivity, a system combining long open path and second harmonic detection technique is developed. The test results show that the time resolution is less than 0.1 second and the detection limit is lower than 3.6 ppmv. This system is adapted for monitoring a large scale methane concentration changing trend instead of measuring its absolute concentration. 展开更多
关键词 气体泄漏监测 可调二极管激光吸收光谱 激光技术应用 TDLAS
基于DSP和FOC控制算法的交流电机调速控制系统 预览
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作者 柯玉军 张辉 《微计算机信息》 2004年第9期 33-34,137,共3页
现代电机控制的发展在提高性能、降低损耗、减少成本和其它不断出现的新的技术指标及特殊应用上的要求越来越高,因此有许多新的复杂的控制算法产生.交流电机有许多直流电机所没有的优点,但是对于交流电机的控制相对直流电机更为困难.而... 现代电机控制的发展在提高性能、降低损耗、减少成本和其它不断出现的新的技术指标及特殊应用上的要求越来越高,因此有许多新的复杂的控制算法产生.交流电机有许多直流电机所没有的优点,但是对于交流电机的控制相对直流电机更为困难.而DSP的应用使得交流电机控制系统无论是在结构复杂程度、成本和效率上都有很大改观.本文结合了交流感应电机的速度控制中较为有效的控制方法即磁场导向控制(FOC)理论和TI公司的DSP控制器TMS320LF2407介绍了DSP在电机闭环控制中的应用. 展开更多
关键词 电机控制 磁场定向理论 DSP 矢量控制
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