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基于数字算法的超分辨光存储伺服控制的研究 总被引:3,自引:3,他引:0
利用传统的相变光盘(CDR/W)驱动器光学头系统,采用基于TMS320VC5409型DSP芯片和XC95144XL型CPLD芯片开发的超分辨光存储系统实验驱动板,引入数字控制算法,实现了光学头的聚焦伺服控制。分析了光学头误差信号产生的原理和光学头机械部分的动静态特性,设计了适合该系统的数字控制算法,达到了静态±0.27μm、动态±1.35μm的控制精度,基本满足了实验系统的需求。 相似文献
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基于SPCE061A的高精度多通道温度测量系统设计 总被引:1,自引:1,他引:0
采用16位高性能单片机SPCE061A为控制核心,选择DS18B20为温度传感器,设计一个三通道高精度温度测控系统.软件采用PID控制算法提高了控温精度.通过电加热水温进行调试验证.结果表明,系统对温度的测量精度达到±0.05℃,控制精度达到±0.2℃;系统具有高可靠性、高精度、高稳定性的特点. 相似文献
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为了实现对电机的可靠控制,并使其操作简单,易于控制,运行状态易于观察,提高设备自动化程度,设计出一种基于EV3000变频器,灵活实用的变频电机调速监控系统.该系统采用艾默生公司生产的EV3000变频器,通过对电机磁通电流和转矩电流的解耦控制,实现了对转矩的快速响应和准确控制,能以很高的控制精度进行宽范围的调速运行和转矩控制.同时通过上位机编程软件设计出功能强大的可视化控制界面,实时显示电机运行状态、变频器参数设置.通过现场试验,结果证明该系统达到了安全稳定简单灵活地控制电机的设计目标. 相似文献
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一种大功率半导体激光器恒温控制系统的设计 总被引:4,自引:0,他引:4
介绍了利用高效、大功率H桥驱动集成块DRV592作为热电致冷器的驱动器构成大功率激光二极管恒温致冷系统的方法.该系统温度探测器利用软件实现负温度系数的热敏电阻的非线性校正(在线参数自整定模糊PID控制方法).核心控制器采用MCS-52单片机来实现对系统的精确控制,对电流的控制精度达到毫安级,温度的控制精度可达±0.1℃. 相似文献
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为了提高激光功率的稳定性和控制精度,设计了一种新颖的高功率激光实时检测与控制装置。该系统由光功率采样单元和反馈控制单元两部分组成。采样单元利用尾镜的微量透射光进行激光采样,经衰减后再由探测器进行接收并对其加以处理;然后将处理信号送到反馈控制单元去自动调节放电电流,以保证输出激光功率的稳定。实验表明,该系统能够实时监控激光的输出功率,有效提高激光功率的控制精度和稳定性。在4kW轴快流CO2激光器上的实际运行结果表明,该系统可使得激光功率稳定度达到±0.1%水平。 相似文献
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机动车排放的总碳氢化合物(total hydrocarbons, THC)是造成雾霾、光化学烟雾的重要原因,在城市大气污染的调查和影响人类健康的研究中,THC是必须的监测目标之一。着重开展了基于氢火焰离子化检测(hydrogen flame ionization detector, FID)的机动车尾气THC测量系统的设计和对比实验。主要介绍了FID测量THC的工作原理,根据FID的测量原理设计了机动车尾气THC测量模块。并根据离子化信号检测需求设计了微电流放大电路,满足大范围、高精度微电流信号检测的要求,获得了检测器对THC的响应峰信号。还对测量得到的THC色谱峰信号进行定性和定量的分析,通过标准曲线法计算了THC的浓度。最后结合美国的SENSORS-FID THC分析仪开展了对比实验,结果表明研发的THC测量模块检测的浓度偏高,测量偏差约为4.44%~8.43%,判断此系统误差主要为O2峰干扰。 相似文献
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Tin‐Yu Wu Nadra Guizani Chun‐Yu Hsieh 《Wireless Communications and Mobile Computing》2016,16(17):3175-3186
With the rapid development of wireless technologies and the growing emphasis on vehicle safety, many vehicular ad hoc network applications have been extensively used. This study attempts to use vehicular ad hoc network technologies for autonomous driving to improve and reduce traffic congestion and vehicle waiting time. Therefore, this study proposes an adaptively intelligent routing system, which uses V2V communications to increase vehicle speed, allows vehicles to communicate with traffic control systems, arranges appropriate vehicle routes based on queuing theory, and uses traffic signals for information exchange. The timing of traffic signals is decided according to road traffic density. To decrease vehicle waiting time at intersections, every vehicle's speed is adjusted based on the distance between the vehicle and the traffic signals. In the simulation, automated vehicles and a more realistic car‐following model are taken into consideration and vehicle speeds are regulated based on speed limits and safe following distance on most roads. The simulation result reveals that our proposed adaptively intelligent routing system outperforms periodic system in average vehicle speed and average waiting time at both single and double cross intersections. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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Averbuch Amir Hulata Eyal Zheludev Valery Kozlov Inna 《Multidimensional Systems and Signal Processing》2001,12(1):9-31
In this paper we propose a robustalgorithm that solves two related problems: 1) Classificationof acoustic signals emitted by different moving vehicles. Therecorded signals have to be assigned to pre-existing categoriesindependently from the recording surrounding conditions. 2) Detectionof the presence of a vehicle in a certain class via analysisof its acoustic signature against the existing database of recordedand processed acoustic signals. To achieve this detection withpractically no false alarms we construct the acoustic signatureof a certain vehicle using the distribution of the energies amongblocks which consist of wavelet packet coefficients. We allowno false alarms in the detection even under severe conditions;for example when the acoustic recording of target object is asuperposition of the acoustics emitted from other vehicles thatbelong to other classes. The proposed algorithm is robust evenunder severe noise and a range of rough surrounding conditions.This technology, which has many algorithmic variations, can beused to solve a wide range of classification and detection problemswhich are based on acoustic processing which are not relatedto vehicles. These have numerous applications. 相似文献
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为了研究温度和气压对车载光学系统成像质量的影响,在分析温度和气压变化对光学系统结构参数影响的基础上,以某型履带式装甲侦察车CCD摄像机为研究对象,建立其光学系统模型,通过设置不同的温度和气压对系统模型进行了仿真分析。利用光学调制传递函数来表征系统的成像质量,得到了不同温度和气压下系统成像质量的变化规律。仿真结果表明:温度和气压的变化幅度越大,光学系统的成像质量越差,并且气压变化对光学系统成像质量的影响程度大于温度变化。此研究对新型车载光学系统的环境适应性设计提供了重要的参考。 相似文献