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2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)最新文献

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A Family of Structure-Dependent Integration Methods Enhanced with Favorable Numerical Damping 一类具有良好数值阻尼的结构相关集成方法
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467699
SHUENN-YIH CHANG*, Chiu-Li Huang
{"title":"A Family of Structure-Dependent Integration Methods Enhanced with Favorable Numerical Damping","authors":"SHUENN-YIH CHANG*, Chiu-Li Huang","doi":"10.1109/ICMAE.2018.8467699","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467699","url":null,"abstract":"A novel family of structure-dependent integration methods is presented. It can have desired numerical properties, such as unconditional stability, second-order accuracy, explicit formulation and controllable numerical damping. In general, it is a one-step method and thus it will involve no distinct starting procedure in conducting time integration. In addition, it has no overshoot in a high frequency forced vibration response, which is often found in a structure-dependent integration method. As a result, it can possess a comparable performance as that of a conventional dissipative implicit method such as the well-known WBZ-alpha method while its computational efficiency is much better than for implicit methods due to the integration of unconditional stability and explicit formulation together.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115510588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Linear Friction Welding for Near Net Shape Manufacturing of Titanium Alloy Ti-6Al-4V Aerospace Components 钛合金Ti-6Al-4V航天部件近净成形的直线摩擦焊接
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467692
A. McAndrew, B. Flipo
{"title":"Linear Friction Welding for Near Net Shape Manufacturing of Titanium Alloy Ti-6Al-4V Aerospace Components","authors":"A. McAndrew, B. Flipo","doi":"10.1109/ICMAE.2018.8467692","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467692","url":null,"abstract":"Titanium alloy aerospace components are typically machined from oversized ingots, forgings and extrusions. This is an expensive process due to the proportionally large amount of material that is purchased compared to the amount that remains after machining. For example, buy-to-fly (BTF) ratios of 20:1 are not uncommon. Linear Friction Welding (LFW), owing to its economic and environmental benefits, has been identified as a disruptive technology for producing these parts. This paper provides an overview of the ground-breaking work on LFW undertaken by TWI Ltd. The microstructure and mechanical properties of titanium alloy Ti-6Al-4V welds are analysed; the results show that the weld microstructure is refined and the mechanical properties are often superior to the parent material. Moreover, examples of the types of components that can be produced, along with the achievable cost savings, are presented. The purpose of this paper is to inform the manufacturing and aerospace industries of the benefits of LFW, so that this innovative manufacturing process may be better exploited.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124275184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Calculation of Characteristic Parameters of Solid Rocket Exhaust Plume Plasma 固体火箭排气羽流等离子体特性参数的计算
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467618
Xing Sun, Hong-hua Cai, W. Nie, Peng Chen
{"title":"Calculation of Characteristic Parameters of Solid Rocket Exhaust Plume Plasma","authors":"Xing Sun, Hong-hua Cai, W. Nie, Peng Chen","doi":"10.1109/ICMAE.2018.8467618","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467618","url":null,"abstract":"To study the plasma distribution characteristics of a solid rocket exhaust plume, the exhaust plume is simulated by Computational Fluid Dynamics (CFD), then the temperature and pressure distribution are obtained. The distribution of plasma concentration is calculated by plasma concentration model. On the basis, the plasma characteristic parameters (including Debye radius, plasma frequency and plasma effective collision frequency) in the exhaust plume are solved and analyzed, afterward the variation of plasma characteristic parameters with the axis direction of the exhaust plume is obtained. The analysis shows that the plasma characteristics of exhaust plume are highly dependent on the temperature, only in the high temperature zone of the rocket plume, the exhaust plume has the properties of plasma.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127148330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Analysis, Simulation and Improvement of Tool Crib Operations in an Aircraft Maintenance Hangar 某飞机维修机库工具槽作业分析、仿真与改进
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467705
Edward Gingell, M. Saliba
{"title":"Analysis, Simulation and Improvement of Tool Crib Operations in an Aircraft Maintenance Hangar","authors":"Edward Gingell, M. Saliba","doi":"10.1109/ICMAE.2018.8467705","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467705","url":null,"abstract":"Large commercial aircraft maintenance facilities are characterized by the simultaneous layovers of multiple aircraft undergoing a wide variety of maintenance checks and modifications. The organizational layout of a maintenance hangar normally includes a tool dispensing store, or tool crib, from which aircraft technicians sign out special tools to carry out specific tasks. Efficient operation of the tool crib ensures that the non-value-adding time spent by technical personnel queuing to be served, and while being served, is kept as low as possible, therefore increasing productivity and minimizing the risk of delay. In this work, a detailed study of the operation of a tool crib in an aircraft maintenance facility is carried out. A detailed and versatile simulation of the operations is developed, based on real data collected at the facility with the aid of a new software tool to facilitate event synchronization. The simulation is then used to investigate quantitatively the effects on the overall waiting time of varying the stock levels of critical tools, of reorganizing the tool storage locations, and of changing the number of human servers. In the context of the case study, it is found that relatively minor changes in tool crib organization can result in substantial savings both in the overall waiting time and in unsatisfied tool requests.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126126520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Tuning Method for PI Controller for an Integrating System with Time Delay 一类时滞积分系统PI控制器的整定方法
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467634
Haitao Sun, M. Ibrahim, Mohannad Jabbar Mnati, A. Van den Bossche
{"title":"A Tuning Method for PI Controller for an Integrating System with Time Delay","authors":"Haitao Sun, M. Ibrahim, Mohannad Jabbar Mnati, A. Van den Bossche","doi":"10.1109/ICMAE.2018.8467634","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467634","url":null,"abstract":"Time delay always exists in several control processes, especially the integrating system, whereas a proportional integral (PI) controller is most widely used. It is mandatory to design a PI controller in a system to obtain a fast and effective response, taking time delay into account, as well as the parameters of the process. A proposed tuning method is presented in the article that gives directly accurate PI parameters for a fast operation, the universal formulas are also proposed as the result. This method is also tested by using simulation tool and the experimental setup, which prove that the new method can be applied for several cases, but especially in inductor current control. The method can provide the parameters of PI control for stable response even in some cases where the inductance may change significantly.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125301868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Digital Structure Matching Verification Method between Large Spacecraft and On-Orbit Heat Flux Simulation Device 大型航天器与在轨热流模拟装置数字结构匹配验证方法
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467613
Jihui Xie, Jing Wang, Xinming Su, Jiayong Qin
{"title":"Digital Structure Matching Verification Method between Large Spacecraft and On-Orbit Heat Flux Simulation Device","authors":"Jihui Xie, Jing Wang, Xinming Su, Jiayong Qin","doi":"10.1109/ICMAE.2018.8467613","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467613","url":null,"abstract":"In vacuum thermal test for Spacecraft, Infrared Heating Tape Array (IHTA) is often used as On-orbit Heat Flux Simulation Device for Spacecraft. In order to improve the accuracy of Heat Flux Simulation, IHTA has to cover the whole surface of Spacecraft and the structure design margin of IHTA is within 50 mm. To confirm the structure of IHTA is compatible with Spacecraft, a set of digital structure matching verification method has been established. This method digitizes the structure of Spacecraft and IHTA into 3D models by Laser 3D Scanning then Structure Matching Verification of them can be done in software. The verification error of this method is better than 20 mm in the case of the structure size is not more than 10m. This method avoids the verification of physical structure matching, saves the development cycle of Spacecraft and reduces the operation risk.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126661286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Survivability Analysis of Small Single Pawn Scout Unmanned Aerial Vehicle 小型单兵侦察无人机的生存能力分析
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467696
Buxian Xiong, Qing Han, Zirui Wang
{"title":"Survivability Analysis of Small Single Pawn Scout Unmanned Aerial Vehicle","authors":"Buxian Xiong, Qing Han, Zirui Wang","doi":"10.1109/ICMAE.2018.8467696","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467696","url":null,"abstract":"Survival ability in the operational environment is becoming more and more important with UAV’s growing application. While the main survivability analysis of the aircrafts is concentrated on the man-aircraft and the large UAVs at present, the combat survivability of single pawn small scouting UAVs is studied in this paper. Based on exposed area, height, speed and other factors, as well as actual combat factors such as UAVs maneuver, a corresponding analysis model is established through the analysis of operational tasks, environmental threats and threat characteristics of ground light weapons. The damage probability of UAVs is analyzed, and the methods of improving survivability from two aspects: design and application, are given through sensitivity analysis.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115535650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stress Analysis of Internal Gear Pairs with Unequal Tooth Thickness 不等齿厚内齿轮副的应力分析
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467644
Tufan G Yılmaz, F. Karpat
{"title":"Stress Analysis of Internal Gear Pairs with Unequal Tooth Thickness","authors":"Tufan G Yılmaz, F. Karpat","doi":"10.1109/ICMAE.2018.8467644","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467644","url":null,"abstract":"This study aims to increase load carrying capacity of internal spur gear mechanism with making stress balance between pinion and internal gear thanks to changing standard thickness on pitch circle. As standard, this thickness value is half of pitch. Actually, it could be changed provided that total pitch value is constant. To evaluate effect of tooth thickness change on stress, finite element analyses were conducted. As an expected result with increasing thickness on pitch circle, the stress decreases. Specific thickness values which make maximum stress equal was determined. Besides, the total mechanism weight was reduced with this design change.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"30 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114059402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On Fairness in the Network Air Traffic Flow Management with Rerouting 基于改道的网络空中交通流管理公平性研究
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467624
Sadeque Hamdan, Ali Cheaitou, O. Jouini, Z. Jemai, I. Alsyouf, M. Bettayeb
{"title":"On Fairness in the Network Air Traffic Flow Management with Rerouting","authors":"Sadeque Hamdan, Ali Cheaitou, O. Jouini, Z. Jemai, I. Alsyouf, M. Bettayeb","doi":"10.1109/ICMAE.2018.8467624","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467624","url":null,"abstract":"This paper presents a fairness model for the network air traffic flow management with rerouting under deterministic capacity. In addition to ground delay and air delay, the model provides control on the aircraft speed through the control of the time spent in each sector, and the ability to reroute the aircraft to avoid or reduce delays. The model covers two aspects of fairness, which are delay distribution and flights reversal. The model outperforms existing works in terms of the number of delayed flights per time period as well as the total and maximum delay.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124130305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Resident Space Objects Streak Extraction and Angular Measurement Error Analysis Base on Space Image Synthesis System 基于空间图像合成系统的驻留空间目标条纹提取及角度测量误差分析
2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE) Pub Date : 2018-07-01 DOI: 10.1109/ICMAE.2018.8467642
E. Wei, Cheng Wei, Yang Zhao, Y. Jing, Dianjun Wang
{"title":"Resident Space Objects Streak Extraction and Angular Measurement Error Analysis Base on Space Image Synthesis System","authors":"E. Wei, Cheng Wei, Yang Zhao, Y. Jing, Dianjun Wang","doi":"10.1109/ICMAE.2018.8467642","DOIUrl":"https://doi.org/10.1109/ICMAE.2018.8467642","url":null,"abstract":"To maintain space situational awareness, development of space-based visible system has gained much attention in recent years. Because the angular measurement accuracy of space-based sensor is very sensitive to orbit determination, it’s necessary to analyze the factors of angular measurement error, which can provide references for optimal design of space-based sensor. In this paper, a space image synthesis system is developed to provide the image source for resident space object detection and extraction. Then image extraction error and pose error of observation platform are analyzed, with which that the angle measurement error decreases as the focal length and size of pixel increase under same image extraction error can be concluded. Compared with position and velocity error of satellite, attitude angle error has greater impact on angle measurement error of RSOs. By using Otsu method and mathematical morphology method, the angle measurement error of RSOs can be controlled within 7 arcseconds.","PeriodicalId":118501,"journal":{"name":"2018 9th International Conference on Mechanical and Aerospace Engineering (ICMAE)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127928660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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