共查询到19条相似文献,搜索用时 218 毫秒
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一种增加LED照明时序彩色投影系统亮度的方法 总被引:3,自引:1,他引:2
基于微型投影显示的色域特性和色彩实现机制,提出了一种提高微型投影系统亮度的方法。在基色子帧中引入其它基色,实现基色坐标的变换,再对微型投影系统亮场白平衡,分析并比较系统在绿色基色校正前后的性能。从理论分析了各色LED的最大工作电流、各基色色坐标和白场色坐标对通过基色校正提高亮度效果的影响。将该方法应用于实验室研发的微型投影系统,在保证系统显示性能的同时,亮度有了25.24%的提升。 相似文献
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基于颜色再现的多基色系统的研究 总被引:3,自引:0,他引:3
本文采用模拟计算方法研究多基色系统对颜色再现的影响,以便实现对于CRT色域范围的最佳扩展。分别采用伪逆矩阵和矩阵转换的方法实现颜色信号到多基色系统驱动信号的转换。模拟结果显示,后者所得结果更为可靠。基于矩阵转换的方法,分别模拟了不同多基色系统的颜色再现情况。 相似文献
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介绍了一种基于美国TAOS公司TCS230数字化芯片的便携式调色仪系统原理,给出了以单片机为核心,依据三基色原理,同时结合调色原理设计一种快速、精确、便捷的调色仪表系统的设计方法. 相似文献
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介绍了利用单片机、旋转编码器和电液比例阀对工程运输车四轮转向系统进行同步控制的基本原理和实现方法.本系统针对三种行车方式,分别给出了其车轮转向的实现和控制方法,重点描述了如何实现轮位同步控制的实现方案. 相似文献
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为了满足视频监控多元化的要求,本文提出了一种基于智能电视的无线视频监控系统。介绍了该监控系统的总体结构,阐述了嵌入式智能电视终端与服务器数据交换的方法,并结合了实际的监控系统,介绍了Android智能电视客户端的设计思路和实现过程。选用H.264标准作为视频压缩标准以及RTP协议作为传输协议,使用无线wifi网络进行组网,实现了使用智能电视进行监控的目的。 相似文献
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《Mechatronics》2006,16(6):309-321
This paper summarizes a MAS based embedded control system design method for complex mechatronic system. Regarding the local controller as an agent-task and based on MAS viewpoint, a practical system can be modeled in firmware/software level. By using the multitasking capability of RTOS to realize the agent-tasks and using the system service of RTOS to construct the MAS’s coordination mechanism, we can implement the MAS in embedded system. A new tele-operation mobile robot, named PBJ-2, is introduced as a development example to explain this method. An improved MAS based manipulator control method is also presented in detail. The PBJ-2’s controller is built as an embedded system that running RTOS on an ARM7TDMI-S microcontroller. The whole development process is introduced in this paper, from the agents’ partitions and the MAS design to the actual hardware and firmware architectures design, in detail. By using the MAS based embedded control system design method, the development procedure is high efficiency and clear hierarchy. The ultimate goal of the work is to get seamless routes from system specifications to its implementation. 相似文献
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提出了一种基于系统模型的快速退火炉温度控制方法。首先采用分段线性化方法和系统辨识方法获得精确的快速退火炉系统模型;然后将该系统模型作为温度控制器的前馈控制,用来提前预测控制输出,提高系统的响应速度,并在此基础上增加反馈控制通道,用来修正模型误差和外界干扰。最后,将此温度控制器应用在我们自主研发的快速退火炉系统上,实验验证了此温度控制器的有效性。 相似文献
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贺敏伟 《微电子学与计算机》1998,(5)
本文提出了一个基于互联网的电视新闻信息系统的实现方法。文中描述了该网络的拓扑结构及联接互联网的方法。该系统具有文稿的录入、编辑、查询、打印、编排和统计功能。 相似文献
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This paper presents a method for calculating the reliability of a system depicted by a reliability block diagram, with identically distributed components, in the presence of common-cause failures. To represent common-cause failures, we use the Marshall & Olkin formulation of the multivariate exponential distribution. That is, the components are subject to failure by Poisson failure processes that govern simultaneous failure of a speciflc subset of the components. The method for calculating system relability requires that a procedure exist for determining system reliability from component reliabilities under the statistically-independent-component assumption. The paper includes several examples to illustrate the method and compares the reliability of a system with common-cause failures to a system with statistically-independent components. The examples clearly show that common-cause failure processes as modeled in this paper materially affect system reliability. However, inclusion of common-cause failure processes in the system analysis introduces the problem of estimating the rates of simultaneous failure for multiple components in addition to their individual failure rates. 相似文献
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《Industrial Electronics, IEEE Transactions on》2005,52(4):1145-1152
This paper presents a flyback inverter controlled by sensorless current maximum power point tracking (MPPT) for a small photovoltaic (PV) power system. Although the proposed system has small output power such as 300 W, a few sets of small PV power systems can be easily connected in parallel to yield higher output power. When a PV power system is constructed with a number of small power systems, the total system cost will increase and will be a matter of concern. To overcome this difficulty, this paper proposes a PV system that uses no expensive dc current sensor but utilizes the method of estimating the PV current from the PV voltage. The paper shows that the application of this novel sensorless current flyback inverter to an MPPT-operated PV system exhibits satisfactory MPPT performance similar to the one exhibited by the system with a dc current sensor as well. This paper also deals with the design method and the operation of the unique flyback inverter with center-tapped secondary winding. 相似文献