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1.
提出了应变对CICC导体稳定性作用的仿真设计思想,研究了应变对临界电流密度的影响,量化了应变作用,推导了导体设计的数学公式,建立了数值仿真设计模型,并进行了导体结构的模拟设计。将数值仿真设计与工程设计进行了比较,结果显示,采用数值仿真设计模型能有效减轻工程设计工作量,缩短设计周期。  相似文献   

2.
从现代显微镜这一典型光学仪器出发,分析和阐述了现代仪器的设计新理念。提出了整体式设计、自由曲面式造型设计、人性化设计、绿色设计以及模块化设计等设计新理念。根据显微镜的发展趋势,对现代仪器的发展方向和趋势作了一个预测。  相似文献   

3.
1 工程设计技术 利用有限元软件和采用CAD设计方法,对复杂结构进行了优化设计,达到了提高产品可靠性的目的。开展了五层阻尼圆板的优化设计,达到了阻尼板具有更佳的减振效果;整机三维立体布线设计,实现了整机布线可视化装配;控制系统的集成化设计,提高了产品的可靠性和降低了电源能耗;Kα波段短脉冲检波器设计,为毫米波短脉冲的检测技术提供了重要的设计经验。  相似文献   

4.
针对地空导弹武器系统检测维修困难的现状 ,利用可测性设计技术 ,提出了地空导弹武器系统可测性设计的方法。阐述了地空导弹武器系统可测试性设计的必要性 ,论述了可测性设计的基本理论 ,分析了地空导弹武器系统可测性设计涉及的相关问题。  相似文献   

5.
为减少民机驾驶舱设计迭代次数,提高设计质量和效率,提出了一种民机驾驶舱布局的设计流程。结合适航要求和人机工效分析方法,对飞行员眼位、人体尺寸、内部视界和外部视界、飞行员坐姿、座椅和脚蹬调节行程、中控台尺寸及其它关键部件位置进行了分析和研究。最后,应用提出的民机驾驶舱布局流程进行了公务机驾驶舱布局设计。结果表明,设计的民机驾驶舱布局流程能够快速实现预期设计目标,提高了设计效率,对民机驾驶舱设计具有指导意义。  相似文献   

6.
胡延平  孙哲  张岩 《应用声学》2015,23(10):71-71
针对船舶电装生产设计中电缆敷设设计复杂繁琐,效率低下的问题,结合实际电缆敷设设计的流程,开发了基于AutoCAD二次开发的船舶电缆虚拟敷设仿真平台。重点对虚拟敷设通道数学模型的建立、交互式图形敷设方式的设计、带限制条件的最短路径算法的实现和电缆通道的仿真进行了详细阐述。电缆虚拟敷设平台的开发已经完成,初步实现了船舶电缆的虚拟敷设。该平台为电装设计人员提供了一种直观,动态的敷设设计方式,简化了电缆敷设设计过程,提高了敷设设计的效率和质量,同时节省了电缆用量。  相似文献   

7.
论述了雷达发射机的冷却和热设计的原则,分析了雷达发射机的常用冷却方法的特点及适用场合。针对目前的雷达发射机热设计现状,从设计思想、热设计的层次和冷却方法等方面提出改进意见,对雷达发射机的热设计方法的优化进行了有益的探讨。  相似文献   

8.
介绍了一种基于LabVIEW的低温制冷机控制器人机界面的设计,阐述了人机交互软件界面设计需注意的一些设计原则,以及操作智能化、人性化、简易化的设计思路,并完成了界面的详细设计。  相似文献   

9.
高速离心压气机的设计与流场数值计算   总被引:8,自引:1,他引:7  
介绍了一个带有分流叶片的小流量离心压气机的设计过程,这个叶轮的主要设计参数为流量0.215 kg/s,转速95000 r/min,压比1.8。简要介绍了离心压气机设计系统,其中包括初步设计及优化模块,性能仿真模块,叶轮造型模块。使用三维N-S方程对所设计的离心压气机在设计点的性能进行了计算,计算结果表明所设计的离心压气机基本能够满足设计要求。  相似文献   

10.
利用CODE V设计含有自由曲面的光学系统   总被引:4,自引:4,他引:0       下载免费PDF全文
由于自由曲面灵活的空间布局和设计自由度,使光学系统的结构得到了简化,像质得到了提高。本文通过设计实例详细介绍了在光学设计软件CODE V中运用用户自定义面型UDS(user defined surface)的功能和计算机动态链接库DLL(dynamic link library)软件技术设计含有自由曲面光学系统的方法。通过利用此方法设计了球面和锥面光学系统,验证了其准确性和可靠性。并且利用此项技术设计了含有自由曲面的光学系统,使光学系统达到了质量轻、体积小的设计目标。此项技术扩充了CODE V软件的功能,有效地拓宽了CODE V计算复杂面型的能力。  相似文献   

11.
Ultrasonic phased array controller for hyperthermia applications   总被引:1,自引:0,他引:1  
Multiple and mechanically scanned ultrasound transducer systems have demonstrated the efficacy of using ultrasound to produce deep localized hyperthermia. The use of ultrasonic phased arrays has been proposed as an alternative to these systems. A phased array offers a more flexible approach to heating tumours in that the size, shape, and position of its focal region can be altered during the course of treatment in order to achieve the desired temperature distribution. This added flexibility comes at the cost of increased complexity of the hardware necessary to drive the transducer because each element requires its own amplifer with both phase and amplitude control. In order for phased arrays with large numbers of elements to be feasible for hyperthermia applications, the complexity of this circuitry must be minimized. This paper describes a circuit design which simplifies the electronics required to control a phased array transducer system for hyperthermia applications. The design is capable of controlling virtually any type of phased array transducer operating at frequencies less than 2 MHz. The system performance was verified through beam profile measurements using a 48-element tapered phased array transducer.  相似文献   

12.
奚畅  蔡志明  袁骏 《应用声学》2019,38(5):837-844
有效估计阵形是提高机动条件下拖线阵声呐探测性能的关键,流体力学类阵形估计方法稳定性和可靠性欠佳,导致其难以应用于工程实际,该文针对此问题提出一种基于拖线阵运动特性的阵形估计方法。利用稳态振荡响应公式计算拖船回转机动时拖线阵稳态阵形特性,将转向机动过程中阵上各点运动状态划分为若干阶段,进而依据偏微分方程特征线理论计算各阶段的分界时刻,探究阵上相邻两点的沿阵切线方向差变化规律,最后通过计算当前阵上各点的沿阵方向实现阵形估计。计算机仿真和海上实验数据验证表明算法可行且有效,与传统的流体力学类阵形估计方法相比具有更高的稳定性和更好的工程应用前景。  相似文献   

13.
侯飞  柏利  乔淑君 《应用声学》2017,25(1):47-49, 53
伴随着雷达技术的飞速发展,数字化相控阵天线开始广泛运用于各种相控阵雷达当中。由于数字化相控阵天线的工作原理与传统模拟相控阵天线差异极大,测试方法也发生了根本性的改变,原有的基于普通微波仪表的天线测试系统无法再对数字化相控阵天线进行测试,必须设计新型的数字化相控阵天线测试系统。本文首先介绍了数字化相控阵天线自身的工作原理和测试方法,随后提出了新型数字化相控阵天线测试系统的具体软硬件设计方案,实际应用表明数字化相控阵天线测试系统可以满足各种数字化相控阵天线的测试要求。  相似文献   

14.
灰阶编码掩模制作微光学元件   总被引:3,自引:3,他引:0  
提出一种基于改变灰阶编码掩模的单元形状和位置的掩模设计新方法,并根据成像过程中的非线性因素,用这种方法对掩模图形进行了预畸变校正,根据部分相干光成像理论和抗蚀剂曝光显影模型,模拟计算了这种灰阶编码掩模产生的空间光强分布和光刻胶上的浮雕结构,采用电子束曝光系统制作了这种掩模,并在光刻胶上获得具有连续面形的微透镜的阵列。  相似文献   

15.
An optical design with a pyramid prism array is employed to simultaneously capture four images. The apex angle design of an upper and lower prism array is to form the upper and the lower images of the object. The design of the left and right prism array is to develop the left and right images. In the prism array, the unwanted image can be eliminated by blacken process in the plane gap between each prism. The optical design was based on the pyramid prism array and a single-lens to make the system light, portable and low-cost.  相似文献   

16.
In radar, planar phased array antenna plays vital role in electronic scanning in the azimuth and elevation direction to the horizon. In most operations using planar phased array both the coordinates of azimuth and elevation, are steered electronically. In this paper a conceptual schematic of a phased array antenna with programmable time delay units has been presented. It is shown that by suitably exploiting the time delay matrix one can have electronic beam rotation around the target axis as required in conical scan. Thus both the elevation and azimuth motors in conical scan system are replaced by electronic scanning. Heuristically, we have selected eight consecutive points for beam rotation in a polygon shape and can also be extended almost circular shape by increasing number of array elements and phase shifter (delays) in the delay matrix. The array requires dual control of phase gradient and individual phase values. The whole array is controlled by micro-controller. This presents exciting possibilities in radar operation.  相似文献   

17.
This paper introduces an efficient parameterization for the nearfield broadband beamforming problem with a single parameter to focus the beamformer to a desired operating radius and another set of parameters to control the actual broadband beampattern shape. The parameterization is based on an orthogonal basis set of elementary beampatterns by which an arbitrary beampattern can be constructed. A set of elementary beamformers are then designed for each elementary beampattern and the desired beamformer is constructed by summing the elementary beamformers with frequency and source-array distance dependent weights. An important consequence of our result is that the beamformer can be factored into three levels of filtering: (i) beampattern independent elementary beamformers; (ii) beampattern shape dependent filters; and (iii) radial focusing filters where a single parameter can be adjusted to focus the array to a desired radial distance from the array origin. As an illustration the method is applied to the problem of producing a practical array design that achieves a frequency invariant beampattern over the frequency range of 1:10 (which is suitable for speech acquisition using a microphone array), and with the array focused either to farfield or nearfield where at the lowest frequency the radial distance to the source is only three wavelengths.  相似文献   

18.
Traditionally, unilateral NMR systems such as the NMR-MOUSE have used the fringe field between two bar magnets joined with a yoke in a 'U' geometry. This allows NMR signals to be acquired from a sensitive volume displaced from the magnets, permitting large samples to be investigated. The drawback of this approach is that the static field (B0) generated in this configuration is inhomogeneous, and has a large, nonlinear, gradient. As a consequence, the sensitive volume of the instrument is both small and ill defined. Empirical redesign of the permanent magnet array producing the B0 field has yielded instruments with magnetic field topologies acceptable for varying applications. The drawback of current approaches is the lack of formalism in the control of B0. Rather than tailoring the magnet geometry to NMR investigations, measurements must be tailored to the available magnet geometry. In this work, we present a design procedure whereby the size, shape, field strength, homogeneity, and gradients in the sensitive spot of a unilateral NMR sensor can be controlled. Our design uses high permeability pole pieces, shaped according to the contours of an analytical expression, to control B0, allowing unilateral NMR instruments to be designed to generate a controlled static field topology. We discuss the approach in the context of previously published design techniques, and explain the advantages inherent in our strategy as compared to other optimization methods. We detail the design, simulation, and construction of a unilateral magnet array using our approach. It is shown that the fabricated array exhibits a B0 topology consistent with the design. The utility of the design is demonstrated in a sample nondestructive testing application. Our design methodology is general, and defines a class of unilateral permanent magnet arrays in which the strength and shape of B0 within the sensitive volume can be controlled.  相似文献   

19.
微机构可调谐阵列滤光片的设计与模型分析   总被引:2,自引:1,他引:1  
刘旭  刘旭 《光子学报》2001,30(9):1150-1152
提出一种新颖的采用薄膜技术在玻璃基底上构造微机可调谐二维窄带滤光片阵列的方法,对器件进行了膜系设计及光谱响应模拟,通过器件的电动力学模型分析,设计出器件的形状与尺寸。  相似文献   

20.
王基强  苏拾  张健  徐达  张国玉 《应用光学》2018,39(1):117-123
针对氙灯太阳模拟器光电转换效率低、寿命短、辐照强度低,均匀性差等不足,基于LED太阳模拟器光学系统,提出了一种球面阵列LED太阳模拟器光学系统,包括准直光学系统、匀光系统以及光源系统的设计方法。利用同轴透射式光学系统技术设计了双分离结构的准直光学系统, 在分析比较常用匀光系统的性能与组成形式的基础上,阐述积分器与视场光阑的设计过程, 然后基于球面光源的设计思想完成光源系统的设计, 利用LightTools光学设计软件对LED太阳模拟器光学系统进行仿真分析与验证。实验结果表明:球面阵列LED太阳模拟器在工作距离100 mm,输出辐照面积为100 mm×100 mm范围内,其辐照强度大于1 100 W/m2,辐照不均匀度优于3.86%。  相似文献   

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