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2020 3rd International Conference on Electron Device and Mechanical Engineering (ICEDME)最新文献

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Tool thermal deformation measurement research based on image processing technology 基于图像处理技术的刀具热变形测量研究
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00168
Kuo Wang, C. Zhao, Qiyin Lv, Xuxu Wang, Shihang Yao, Jun Liu
Aiming at the problem of tool deformation during machine preheating, a tool thermal deformation measurement scheme based on image processing was designed to analyze the relationship between the position change of tool axial due to thermal error and the preheating time.High speed camera was used to collect tool images, and canny algorithm was used to extract rough positioning of the edges of the images combined with matlab software. Subpixel fitting edge detection method was used to precisely locate the tool edge contour, that is, the least square method was used to fit the tool tip curve and calculate the size of tool deformation. The accuracy of tool deformation measurement can reach micron level.
针对机床预热过程中刀具变形的问题,设计了一种基于图像处理的刀具热变形测量方案,分析了热误差引起的刀具轴向位置变化与预热时间的关系。采用高速摄像机采集刀具图像,结合matlab软件,采用canny算法提取图像边缘的粗略定位。采用亚像素拟合边缘检测方法精确定位刀具边缘轮廓,即采用最小二乘法拟合刀尖曲线,计算刀具变形大小。刀具变形测量精度可达微米级。
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引用次数: 2
Influence of Fire on the Component and Performance for the Concrete of Reinforced Concrete Beams 火灾对钢筋混凝土梁混凝土构件及性能的影响
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00051
Xin Gongfeng, Wang Baoqun, Zhang Huiqin, Xing Dejin
This paper adopts experimental methods to investigate the component and microstructure of the concrete slab in reinforced concrete (RC) bridges after fire hazards, and the obtained results show that the com ponent and microstructure of concrete slabs will change significantly after fire hazards. Specifically, after the RC beams undergo a fire in low temperature (lower than 400°C), since the structure of cement stone in concrete is relatively compact, the fire product transforms from compact hydrated calcium silicate to island-like calcium silicate, leading the structure to become loose. After the RC beams undergo a fire in high temperature (higher than 400°C), the decomposition of the crystal inside the concrete causes large number of cracks and voids inside the structure, leading to the microscopic damage and decrease in strength of concrete. This paper preliminarily reveals the damage mechanism of RC bridges after fire hazards through the experimental study. It lays a theoretical foundation for the research of bridges’ performance deterioration.
本文采用实验方法对火灾发生后的钢筋混凝土桥梁混凝土板的组成和微观结构进行了研究,结果表明火灾发生后混凝土板的组成和微观结构会发生显著变化。具体而言,RC梁在低温(低于400℃)下受火后,由于混凝土中水泥石料结构相对致密,火产物由致密水化硅酸钙转变为岛状硅酸钙,导致结构松动。RC梁在高温(高于400℃)下受火后,混凝土内部晶体的分解使结构内部产生大量裂缝和空洞,导致混凝土微观损伤,强度下降。通过试验研究,初步揭示了RC桥梁火灾后的损伤机理。为桥梁性能劣化问题的研究奠定了理论基础。
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引用次数: 0
Validation of Missile Simulation Model Based on Bayesian Theory with Extreme Small Sample 基于极小样本贝叶斯理论的导弹仿真模型验证
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00161
Zhiwei Dai, Hongkui Wei, Xu Li, Meibo Lv
The cost of weapons and equipment, such as high-precision guided missiles, is high to manufacture, and the cost of live-fire launch test is also high. So the number of test data samples is very small, which cannot meet the sample capacity requirements of classic statistical methods. Therefore, this paper proposes a Bayes parameter estimation method based on Grey prediction Model and Bootstrap method (GM-Bootstrap), and it is applied to the simulation model validation under extreme small sample test. First, the Grey prediction Model (GM) is used to expand the extreme small sample, then the Bayes Bootstrap method is used to obtain the parameter distribution, and then the Bayes parameter estimation method is used to obtain the estimation of the unknown parameter. Finally, the simulation model validation under the extreme small sample test was completed through hypothesis testing. The credibility of the method is verified through an example, and a new method is provided for the costly validation of weapon equipment models.
高精度制导导弹等武器装备的制造成本很高,实弹发射试验的成本也很高。因此,测试数据样本数量很少,不能满足经典统计方法的样本容量要求。因此,本文提出了一种基于灰色预测模型和Bootstrap方法的贝叶斯参数估计方法(GM-Bootstrap),并将其应用于极端小样本检验下的仿真模型验证。首先使用灰色预测模型(GM)对极值小样本进行扩展,然后使用贝叶斯Bootstrap方法获得参数分布,然后使用贝叶斯参数估计方法获得未知参数的估计。最后,通过假设检验完成极小样本检验下的仿真模型验证。通过算例验证了该方法的可靠性,为武器装备模型的高成本验证提供了一种新的方法。
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引用次数: 0
Effect of interlayer material on the spreading performance and microstructure of diffusion brazd IC10 superalloy 层间材料对扩散钎焊IC10高温合金扩散性能和显微组织的影响
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00120
Qi Li, Ming Xiong, Fengmei Liu, X. Yue, Likun Li, Haitao Gao, Y. Yi
The diffusion brazd test of IC10 superalloy was carried out by using Russia solder M4 interlayer powder. The wetting quality of the high-temperature alloy was evaluated by the contact angle of wetting at various temperatures. The result shows that at the temperature of 1250°C, the contact angles of interlayer powder M4 alloy do not exceed 10°, it has high wettability and spreadability over the surface of the IC10 alloy. The structure of the joints has a smooth transition from the base metal to the soldered joint when the interlayer powder M4 was used. In the structure of the joint, the base metal contains a large number of Ɣ '- phases. The microstructure of the weld metal does not have continuous eutectic layers, but includes carbide carboride and other phases when the interlayer powder M4 was used.
采用俄罗斯焊料M4层间粉对IC10高温合金进行了扩散钎焊试验。通过不同温度下的润湿接触角来评价高温合金的润湿质量。结果表明:在1250℃温度下,层间粉末M4合金的接触角不超过10°,在IC10合金表面具有较高的润湿性和铺展性。使用层间粉末M4时,接头的组织从母材到焊点的过渡平滑。在接头组织中,母材含有大量的Ɣ′相。使用层间粉末M4时,焊缝金属的显微组织不存在连续的共晶层,而是包含碳化物和其他相。
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引用次数: 0
Research on bandgap characteristics of locally resonant stiffened plate structures 局部共振加筋板结构带隙特性研究
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00068
Yameng Zhang, Hongsai Huang, Changli Liu
In order to reduce the vibration of the stiffened plate, this paper presents a stiffened plate structure with a local resonance unit of the spring oscillator arranged periodically on the side of the stiffened plate without the stiffened bar, and studies the energy band structure and transmission characteristics of the structure. The band structure analysis shows that two band gaps are formed in the structure. The frequency range of the first band gap is 1165.23~1300.45Hz, and the frequency range of the second band gap is 198.97~243.88Hz. Furthermore, the influences of lattice constant, matrix mass ratio of the stiffened plate to the vibrator mass ratio, and the resonator spring stiffness on the band gap range are further analyzed. The transmission characteristics of local resonance stiffened plate structure with finite period are analyzed. These research structures provide important theoretical basis and technical support for vibration reduction design of stiffened plate structure.
为了减小加筋板的振动,本文提出了一种在加筋板侧面周期性布置弹簧振子局部共振单元的加筋板结构,并研究了该结构的能带结构和传递特性。带结构分析表明,在结构中形成了两个带隙。第一个带隙的频率范围为1165.23~1300.45Hz,第二个带隙的频率范围为198.97~243.88Hz。进一步分析了晶格常数、加筋板基体质量比、振子质量比和谐振腔弹簧刚度对带隙范围的影响。分析了有限周期局部共振加筋板结构的传动特性。这些研究结构为加筋板结构的减振设计提供了重要的理论依据和技术支持。
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引用次数: 0
Design Path Exploration of Modern Furniture Based on Lifestyle Theory 基于生活方式理论的现代家具设计路径探索
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00101
Yi Feng
This article explores the impact on modern furniture design from the perspective of lifestyle theory, explores new design strategies for furniture design in today's society, and summarizes diversified design paths. It leads to the direction of innovation in the furniture market and points out that the core of current furniture design is creativity based on the current changes in people's actual needs brought about by the current social development. Afterward it explores the specific strategies of furniture design from the aspects of culture, design strategy, realization form, customization, and marketing characteristics, summarizes the development trend of furniture design, tries to find new and more practical and effective design methods, and provides reference theoretical basis for the future development of furniture design.
本文从生活方式理论的角度探讨对现代家具设计的影响,探索当今社会家具设计的新设计策略,总结多元化的设计路径。它引出了家具市场创新的方向,指出当前家具设计的核心是基于当前社会发展所带来的人们实际需求变化的创意。随后从文化、设计策略、实现形式、定制化、营销特征等方面探讨家具设计的具体策略,总结家具设计的发展趋势,试图寻找新的更实用有效的设计方法,为家具设计的未来发展提供参考理论依据。
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引用次数: 0
Simulation and realization of frequency occupation in sinusoidal oscillator 正弦振荡器频率占位的仿真与实现
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00016
Wenzhan Du, Haibin Jiang, Zhiyong Yu
The research purpose of this paper is to add a signal source on the basis of capacitive three-point oscillation circuit to produce frequency occupation phenomenon. Firstly, the frequency occupation phenomenon is simulated with Multisim 10 software to verify the accuracy of the calculated frequency occupying the critical point and bandwidth. Then the hardware circuit is built on the printed circuit board, and the actual waveform and spectrum diagram are compared with the corresponding diagram generated by the simulation software Multisim 10. By comparing the differences between them, the rationality of the static operating point and component parameter setting of the circuit is judged.
本文的研究目的是在电容式三点振荡电路的基础上增加信号源,产生占频现象。首先,利用Multisim 10软件对频率占用现象进行仿真,验证计算频率占用临界点和带宽的准确性。然后在印刷电路板上构建硬件电路,并将实际波形和频谱图与仿真软件Multisim 10生成的相应图进行对比。通过比较两者的差异,判断电路静态工作点和元件参数整定的合理性。
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引用次数: 0
The study of temperature-dependent degradation of optical output on 808 nm GaAs-Based High-Power Laser Diode Bars 808 nm gaas基大功率激光二极管光输出温度衰减研究
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00033
Tieying Hao, Shiwei Feng, Xiang Zheng, Kun Bai
The degradation mechanism of 808nm GaAs-based high-power laser diode bars (LDBs) with 6 single laser diodes was investigated using infrared thermography and photoemission microscopy. Over time, measurements of output power indicated that one of the 6 laser bars had a serious degradation of output power. Infrared imaging and photoemission microscopy revealed that solder voids during packaging resulted in premature failure due to high temperatures in the lasing region. The current reliability of LDB devices is compromised by these packaging defects.
采用红外热像仪和光电显微镜研究了6个单激光二极管对808nm gaas基大功率激光二极管棒(ldb)的降解机理。随着时间的推移,对输出功率的测量表明,6个激光棒中的一个输出功率严重下降。红外成像和光电发射显微镜显示,由于激光区域的高温,封装过程中的焊料空洞导致过早失效。目前LDB器件的可靠性受到这些封装缺陷的影响。
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引用次数: 0
Structural Parameters Optimization of Rectangular Sealing Ring Based on Orthogonal Test 基于正交试验的矩形密封圈结构参数优化
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00078
Chen Fei, Li Tuo, Jiang Li, Yuan Xiaozhongling, Yong Xiaolong
The rectangular sealing ring mainly used in static sealing structure is usually subject to sealing failure, permanent deformation and other problems in practical use. The two-dimensional axis-symmetrical finite element analytical model of rectangular sealing ring during working is established to deal with the above prominent problems based on Von Mises yield principle, virtual work principle, axial symmetry principle and nonlinear contact theory, and orthogonal optimization is used to optimize the key structural parameters of rectangular sealing ring such as section width, section thickness and chamfer size to acquire the optimal combination scheme for key parameters of sealing ring, and contrastive analysis is done on the mechanical property of sealing ring before and after optimization. The research results indicate that: First the ranking of the factors affecting the performance of rectangular sealing ring in descending order is: section width, chamfer size, section thickness; Second the optimal combination for key structural parameters of rectangular sealing ring is: section width of 4 mm, section thickness of 3.5 mm, and chamfer size of 0.3 mm; Third compared with that before optimization, the maximum contact stress of rectangular sealing ring after optimization is improved by 21.87% on average, amount of compression reduced by 11.59% on average, and the maximum Mises stress increased only by 7.72% on average; fourth under the same axial assembly force, the optimized rectangular sealing ring has the contact stress increased, the amount of compression reduced and the risk of permanent deformation lowered; Fifth, Mises stress and contact stress of the optimized rectangular sealing ring are uniformly distributed, beneficial to improving the sealing performance. According to the conclusion, the rectangular sealing ring after parameter optimization can better satisfy the requirements on sealing performance and avoid permanent deformation.
主要用于静压密封结构的矩形密封圈在实际使用中通常会遇到密封失效、永久变形等问题。针对上述突出问题,基于Von Mises屈服原理、虚功原理、轴对称原理和非线性接触理论,建立了矩形密封环工作时的二维轴对称有限元解析模型,并采用正交优化方法对矩形密封环截面宽度、以截面厚度和倒角尺寸为参数,获得了密封圈关键参数的最优组合方案,并对优化前后的密封圈力学性能进行了对比分析。研究结果表明:①影响矩形密封圈性能的因素由大到小依次为:截面宽度、倒角尺寸、截面厚度;矩形密封圈关键结构参数的最优组合为:截面宽度为4 mm,截面厚度为3.5 mm,倒角尺寸为0.3 mm;(3)与优化前相比,优化后矩形密封圈最大接触应力平均提高21.87%,压缩量平均降低11.59%,最大Mises应力平均仅提高7.72%;④在相同轴向装配力下,优化后的矩形密封圈接触应力增大,压缩量减小,永久变形风险降低;优化后矩形密封圈的米塞斯应力和接触应力分布均匀,有利于提高密封性能。综上所述,参数优化后的矩形密封圈能够更好地满足密封性能要求,避免永久变形。
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引用次数: 0
Study on the influence of physical index of modified PLA filter rod on cigarette smoke index 改性聚乳酸滤棒物理指标对卷烟烟雾指数影响的研究
Pub Date : 2020-05-01 DOI: 10.1109/ICEDME50972.2020.00118
Yu Bao-Shan, Wang Tao, Wang Hao, Zhang Jianbo, Li Geng, Z. Han, Xie Jiao
To keep the processing standards unchanged, the modified PLA cigarette filter rods with different tow specifications (3.3Y/40000, 3.6Y/45000) and different draw resistances (3800Pa, 4200Pa, 4600Pa) were selected for the test, and the cigarette samples were tested and analyzed. The results showed that the tar, nicotine, CO and moisture content of 3.6Y/45000 tow cigarette decreased, but the total particles and the number of puff counts were almost the same. With the increase of glycerol triacetate, the tar emission decreased gradually, the CO total particulates and nicotine emission remained basically unchanged, and the moisture content of smoke increased gradually, indicating that the appropriate increase of glycerol triacetate application may be conducive to improving the sensory comfort of cigarette.
在不改变加工标准的前提下,选用不同拖束规格(3.3Y/40000、3.6Y/45000)、不同拉伸阻力(3800Pa、4200Pa、4600Pa)的改性PLA卷烟滤棒进行试验,对卷烟样品进行测试分析。结果表明,3.6Y/45000支卷烟的焦油、烟碱、CO和水分含量下降,但总颗粒数和吞吐次数基本不变。随着三乙酸甘油用量的增加,焦油排放量逐渐下降,CO总颗粒物和尼古丁排放量基本保持不变,烟雾水分含量逐渐增加,说明适当增加三乙酸甘油用量可能有利于提高卷烟的感官舒适度。
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引用次数: 2
期刊
2020 3rd International Conference on Electron Device and Mechanical Engineering (ICEDME)
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