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电视跟踪测量设备光学系统参数的优化设计 总被引:2,自引:1,他引:1
光学系统参数对电视跟踪测量设备的综合性能起着决定性作用。光学参数的选取不仅要满足设备的技术指标要求,还要考虑生产加工和实际使用的需要。从分析像点位移引起测角误差与焦距的关系以及CCD靶面光照度与通光口径的关系着手,用满足信号检测的调制对比度作为判据,探讨光学参数优化设计的方法。 相似文献
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This paper further proves that a single spiral strange attractor can be observed in an extremely simple autonomous electrical circuit by computer simulation. It is of third order and has only one nonlinear element: a three-segment piece-wise linear resistor. The digital analyses show that the strange attractor has peculiar features compared with other third-order differential systems. 相似文献
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This paper focuses on the development of a complete non-linear model of a hydraulic engine mount and the evaluation of the model using a unique experimental apparatus. The model is capable of capturing both the low- and high-frequency behavior of hydraulic mounts. The results presented here provide a significant improvement over existing models by considering all non-linear aspects of a hydraulic engine mount. Enhancements to already published non-linear models include a continuous function that follows a simplistic yet effective approach to capture the switching effect and leakage through the decoupler, and upper chamber bulge damping. It is shown that the model developed here provides the appropriate system response over the full range of loading conditions (frequency and amplitude) encountered in practice. In order to obtain the parameter values for the non-linear model, a unique test apparatus is introduced. Using the experimental set-up, it is possible to verify the model of individual components of the mount, and later on test the behavior of the whole assembly. These data also establish the relative importance of several damping, inertia and stiffness terms. In addition, the measured responses of the mounts to loading at various frequencies and amplitudes are compared to the predictions of the mathematical model. The comparisons generally show a very good agreement (better than 10%), which corroborate the non-linear model of the mount. It is felt that this work will help engineers in reducing mount design time, by providing insight into the effects of various parameters within the mount. 相似文献
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本文用简练的方法把大学物理实验课的误差理论表述出来,而且引入了不确定度来描述测量结果。把容易混淆和不容易弄懂及不易被注意的问题作了适当的解释。 相似文献
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本文从理论上推导出双棱镜干涉实验中各参量的取值范围,并通过实验研究找到测量误差小于1%时各参量的取值,这为减小实验误差提供了理论和实验依据. 相似文献
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脉冲响应函数与平面周期物体构成任意光学系统的成象特性研究——理论与实验 总被引:1,自引:1,他引:0
本文首先用线性系统中脉冲响应函数的概念分析了光学系统中平面周期物体的广义Talbot效应,利用我们以前导得的Talbot和Lau成象条件,导出了广义Talbot成象条件,得到十分简洁的系统脉冲响应表示式,然后利用光学系统的线性叠加和相关原理研究了任意光学系统中Talbot效应、Lau效应和多重成象现象及其相互关系,最后讨论了任意光学系统中三者之间的关系,并进行了实验证明。所用方法简单明了。 相似文献
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Gou Qingquan Institute of Atomic Molecular Sicences at High Temperature High Pressure Sichuan Union University Chengdu 《原子与分子物理学报》1997,14(4):511-525
长期以来把研究热运动规律性的理论分割成热力学与统计物理两门课来讲,是不正确的。此文阐明从原子分子体系出发来研究热运动的规律,可使两者融合为一体,建立一个新的热运动理论体系。 相似文献
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单模激光系统中混沌吸引子的分维 总被引:11,自引:3,他引:8
对单模激光系统动力学行为的Laser-Lorenz方程进行了线性稳定性分析,通过计算Lyapunov指数来确定该系统中混沌吸引子的分维。 相似文献
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W. GLABISZ 《Journal of sound and vibration》2002,258(4):633-648
A qualitative numerical technique is presented for identifying chaotic states of a non-linear one-sided constrained one-degree of freedom (1-d.o.f.) deterministic system under a dynamic non-conservative load. Discrete wavelet analysis in its classic and packet versions was used to search for the boundaries of chaotic and non-chaotic solutions. The results obtained were verified by an analysis of the Lyapunov exponents of the investigated system. On the basis of numerical tests, one can state that wavelet analysis may be a fast and reliable tool suitable for searching for the boundaries of chaotic and non-chaotic solutions. 相似文献
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介绍一种光电跟踪系统所采用的轴角编码与数字显示器。分析跟踪型轴角编码器的基本原理,探讨并提出了提高分辨率的具体方法,保证系统测角精度并可进行数字显示。 相似文献