第四届国际航空科学青年学者学术会议（ICAYS 2019）通知
第四届国际航空科学青年学者学术会议（4th International Conference in Aerospace for Young Scientists，ICAYS 2019）将于2019年10月12日至13日在北京航空航天大学举行。本届会议主题为“融西汇中，学思共享”，议题包含固体力学、流体力学、动力学和控制、飞行器设计、人机与环境工程、航空动力与推进、航空教育、产学研。
国际航空科学青年学者学术会议（ICAYS）旨在促进国内外各高校和院所青年学者之间的学术交流，培养创新意识和创新思维；为各高校和院所同一学科内部或不同学科之间学术思想的交流搭建平台，使各种学术思想融会贯通，相互迸发，汲取灵感；为提高国内外青年学者的学术水平而贡献力量。本届会议得到了国际同行的广泛关注。会议邀请到来自瑞士国家联邦实验室EMPA、英国南安普顿大学、英国东英吉利大学、英国莱斯特大学、淡江大学、西南交通大学等世界知名大学和科研机构的9位顶级专家。同时会议收到了来自北京航空航天大学、淡江大学、大连理工大学、中国科学院、浙江大学、华北电力大学、中国航天动力技术研究院、中国空气动力研究与发展中心、中国农业大学、中国民用航空飞行学院、山东交通学院、重庆大学等12个国内航空高校和科研院所，以及英国、德国、乌克兰、澳大利亚、巴西、阿联酋、巴基斯坦等8个国家和地区共81篇论文。
本届会议将有超过200人直接参会。会议期间，将举办3场开幕式报告、10场特邀报告、10场分会场报告，以及55场投稿作者宣讲会。所有报告面向全校师生开放，以供参与交流。详情请访问ICAYS会议官网：http://icays.buaa.edu.cn/。
开幕式报告一
报告人：Andrea Da Ronch
报告题目：Impact of Epistemic Uncertainty in Turbulence Modelling on Aerodynamic and Aeroelastic Analysis
报告时间：2019年10月12日上午09:30-10:00
报告地点：新主楼第二报告厅
报告人简介：Andrea Da Ronch is a Lecturer in Aerospace Engineering, the Academic Integrity Officer and the Director of the Flight Simulator of the University of Southampton, UK. He coordinates a group of 7 researchers and manages a portfolio of projects in excess of £1,000,000 as the Principal Investigator or Co-Investigator. He attracted research grants from national and international councils, from the Royal Academy of Engineering (RAEng), the Engineering and Physical Sciences Research Council (EPSRC), to the European Commission H2020 framework and the Air Force Office of Scientific Research (AFOSR). He received commissions by Airbus Operations Ltd to transfer research innovations to industry by addressing practical needs. He has a well-proved experience in multi-disciplinary computational aero-sciences and modelling techniques to reduce the computational complexity of mathematical models in numerical simulations, with particular interests in aircraft design, aerodynamics and aeroelasticity. He has published a book, “Advanced UAV Aerodynamics, Flight Stability and Control: Novel Concepts, Theory and Applications” by John Wiley & Sons, and his peer-reviewed journals were cited more than 1,000 times. He serves as the Chair of the AIAA Student Paper Competition within the remits of the Atmospheric Flight Mechanics Technical Committee, he is a reviewer of multiple international journals and research grant platforms, and he is on the Editorial Board of Aerospace.
开幕式报告二
报告人：CHEN Bo
报告题目：Selective Electron Beam Melted High-temperature Materials: Challenges and Opportunities
报告时间：2019年10月12日上午10:40-11:10
报告地点：新主楼第二报告厅
报告人简介：Bo obtained BEng degree from Beihang University between 2003 and 2007, specialising in Materials Engineering. He then carried out his PhD in Department of Engineering at University of Bristol, between 2007 and 2011, followed by taking two Post-doctoral Research Associate posts in 2011 in Bristol’s High Temperature Centre and then in 2013 in Materials Performance Centre at University of Manchester. In 2015, Bo moved to a Lectureship at Coventry University, being promoted to Senior Lecturer in 2017. He was awarded a 5-year EPSRC Early-Career Fellowship in Nuclear Fission in 2019. Bo became a UK Full Professor of Engineering Materials at University of Leicester in March 2019 and at the same time he took the Associate Director role for the NISCO UK Research Centre. He has delivered research outcomes by publishing regularly in pre-eminent conference and peer-reviewed Q1 journals (41) that include top journals in the field: Acta Materialia (IF: 7.3, 3 papers) and International Materials Reviews (IF: 21.1).
开幕式报告三
报告人：WANG Wandong
报告题目：How to obtain pure mode I fracture toughness in adhesively bonded bi-material joints
报告时间：2019年10月12日上午11:10-11:40
报告地点：新主楼第二报告厅
报告人简介：Dr. Wandong Wang is working at Empa, ETH domain, Switzerland. His research interests lay in devel-oping a physically sound understanding of the failure and degradation of lightweight structures and techniques to remedy the problem. He obtained his PhD degree in Aerospace Engineering from Delft University of Technology. At Delft, he worked on the damage tolerance of Glare that is a hybrid mate-rial used on Airbus A380. Later on he worked on a CleanSky 2 project of developing new techniques to bond CFRP to titanium and failure characterization of bonded Ti-CFRP joints. He received B.Sc degree and M.Sc degree from Northwestern Polytechnical University in 2010 and Beihang University in 2013 respectively.
分会场特邀报告一
报告人：WANG Yi-Ren
报告题目：Vibration Reduction for Nonlinear Beam Systems-Internal Resonance
报告时间：2019年10月12日下午14:30-15:00
报告地点：新主楼第4会议室
报告内容简介：The nonlinear dynamic analyses of beams have been widely studied for years because of their wide applications in engineering structural members and many technological devices. This report will introduce several typical nonlinear properties and also give examples on the damping techniques on elastic beam vibrations. Most of the study examples are focused on using the dynamic vibration absorber (tuned mass damper (TMD)) to surpass the nonlinear vibrations. Among the many methods of vibration reduction, passive dampers are the most widely used, due to their simplicity and low cost. In this report, the TMD is used to prevent internal resonance and reduce beam vibration taking into account various damping effects. With the premise of preserving the original vibration configuration, the optimal damping effects are achieved without excessive cost, simply by adjusting the location, mass, and modulus of elasticity of the TMD. Some design guidelines for the TMDs are presented for the optimal damping effects on the vibration system.
报告人简介：Yi-Ren Wang is a professor of Department of Aerospace Engineering at the Tamkang University. His specialties include Aeroelasicity, Structural Dynamics, Nonlinear Vibration and Wake Dynamics. He received his Ph.D. in Aerospace Engineering from the Georgia Institute of Technology, U. S. A. He was the chairman of Department of Aerospace Engineering at Tamkang University. He was awarded the best paper of the year 2013 of JoAAA and ICAYS-2017 conference. He was also awarded the distinguished teacher of the year 2016 of Tamkang University. He is an experienced international Journal reviewer. Dr. Wang has also served on the AASRC academic committee, and has been the Associate Editor for the Journal of Applied Science and Engineering (JASE). In addition, he also served as councilor in both Association of Helicopter Development and Aeronautical and Astronautical Society.
分会场特邀报告二
报告人：LIU Dianzi
报告题目：An efficient method for solving constrained black-box optimization problems
报告时间：2019年10月12日下午14:30-15:00
报告地点：新主楼第5会议室
报告内容简介：Due to the exponential growth of supercomputing power, numerical simulations involving Finite Element Models (FEM) or coupled multidisciplinary analysis prove to be the most helpful, valuable and general technique to take the place of expensive experiments across many engineering subjects, such as civil, structural, aerospace and automotive engineering. Computer simulation-based design optimization has also been applied in engineering to achieve optimal designs. However, there are three major challenges for optimization on this kind of high fidelity models. First of all, numerical simulations in practical engineering are typically computationally expensive (for example, a whole-vehicle impact simulation). As a result, evolutionary methods such as particle swarm optimization (PSO), genetic algorithms (GAs) are not suitable optimization methods because they need lots of evaluations which are not affordable and realistic in real-world engineering. Secondly, numerical modeling executed by software is a black box for users. The derivative information is unavailable, unreliable, or impractical to obtain, rending most methods based on finite differences is of little or no use. Finally, real-world optimization problems could have various complex properties including nonlinearity, non-convexity and multi-modality. To alleviate the computational overhead, metamodel techniques are proved to be promising in replacing the expensive simulation calls.
In this research, CBOILA (Constrained black-box optimization by intrinsically linear approximation), a trust-region based iterative method, is proposed to solve a sequence of constrained optimization sub-problems by using approximations of the objective function and constraints in a series of trust regions. Results show the potential of this developed method for solving large-scale optimization problems with a high level of efficiency.
报告人简介：Dr. Liu is from the University of East Anglia, UK. He has more than 10 years of experience in structural analysis, composites modelling, numerical computation and design optimization. More recently, his research has been focused on three themes: 1) Developing efficient algorithms for solving complex engineering optimization problems; 2) Designing energy harvesting devices for scavenging the bio-kinetic energy; and 3) Defect detection using ultrasonic guided waves.
He has successfully completed various projects funded by EU-FP7 and industries such as Airbus UK and Jaguar Land Rover Company. The applications of these projects can span from composite fuselage design to control of bonnet fluttering and from structural integrity improvement to reliable and robust designs.
Dr. Liu is the author of more than 20 technical papers since 2016 and is the recipient of the runner-up prize in the ISSMO-Springer Prize competition in 2009. He is a Member of South Asia Institute of Science and Engineering (SAISE), Member of American Institute of Aeronautics and Astronautics (AIAA) and Member of International Society for Structural and Multidisciplinary Optimization (ISSMO). He was the host chair for International Symposium on Mathematics and Computer Science 2015. He has been a recipient of Short-term Recruitment Program of Professional Scholars sponsored by Beihang University since 2016.
分会场特邀报告三
报告人：Fu-Yuen Hsiao
报告题目：Automatic Altitude Control and System Integration of Ultra Lightweight Robotic Birds
报告时间：2019年10月12日下午14:30-15:00
报告地点：新主楼第8会议室
报告内容简介：This talk reviewed a control law for stabilizing the vertical motion of a flappingwing MAV and developed a system architecture that is potentially beneficial in realizing the autonomous flight of flapping-wing MAVs fewer than 10 g. The talk began with a brief introduction to the Golden Snitch, including its development history and the development of the overall system. The vertical dynamics were given for altitude control. The use of wind tunnel tests to obtain aerodynamical parameters was described. Due to the limited payload-carrying capability, the control architecture was modified so that automatic control of flight altitude of a flapping-wing MAV fewer than 10g is possible using current technology. Taking the hardware constraint into account, it was shown that the modified P-control can stabilize the vertical motion and track altitude commands. Numerical simulations and flight tests were presented that demonstrate the function of the developed control law and the system architecture. We believe this flapping-wing MAV to be the first under 10 g able to automatically maintain its flight altitude.
报告人简介：Dr. Fu-Yuen Hsiao is currently an Associate Professor with the Department of Aerospace Engineering in the Tamkang University (TKU), Taiwan. He obtained his Ph.D. from the University of Michigan at Ann Arbor in 2004, and B.S.E from National Cheng- Kung University in Taiwan in 1997. He is currently the advisor of the Unmanned Aerial Vehicle Laboratory in TKU, and has devoted himself for years to the research regarding applications of computer vision, flight dynamics of aircraft and spacecraft, and orbit mechanics.
分会场特邀报告四
报告人：LI Tao
报告题目：Hypervelocity impact resistance of 2D_C/SiC composites at different temperatures
报告时间：2019年10月13日上午08:30-09:00
报告地点：新主楼第3会议室
报告内容简介：To understand the mechanical behavior of C/SiC composites under hypervelocity impact at different temperatures, impact tests are conducted using a modified electrical gun, and corresponding numerical simulations are implemented. In addition, the decrease of residual strength induced by damage is also measured after impact tests. Tensile and shear failures occur in different regions of fracture, and the damage zone around the fracture is very confined. Besides, the distribution of debris clouds shows “three zones” mode, forming with different mechanisms, and demonstrates that there is a high-energy powdering column in the center zone. As for the diameter of penetration hole, it increases with impact velocity. At low temperature, with the change of mechanical properties and forming of new micro-cracks, the fracture is smoother, while the diameters of damage zone and penetration hole are smaller. Furthermore, the damage induced by hypervelocity impact significantly reduces the strength of C/SiC composites. Since the decrease of elastic modulus induced by damage weakens the stress concentration effect of the penetration hole, the residual strength of recovered target plate is only reduced from 241 MPa to 175 MPa.
分会场特邀报告五
报告人：XU Qi
报告题目：Definite Integral Stability Method of Multi-Delay Systems with Thermo-Acoustic Applications
报告时间：2019年10月13日上午08:30-09:00
报告地点：新主楼第8会议室
报告内容简介：Time delay is an inevitable factor in real systems, like robot, internet, metal cutting, man-machine interaction, and so on. Usually time delay systems are categorized into two classes: Retarded type and neutral type, where the neutral ones have peculiar dynamical behaviors and are often more complex. Capable of dealing with both types, we have developed a definite integral stability method, which is efficient, and convenient for computer coding, and suits for multiple discrete delay systems. In addition, a thermo-acoustic oscillation problem, which involves multiple time delays, is introduced to illustrate the proposed definite integral stability method.
