AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)最新文献

{"title":"Aero-viscoelastic Effects in daVinci-Euler-Bernoulli and Timoshenko Beams with Physical Starting Transients, Moving Shear Centers and Neutral Axes","authors":"H. Hilton, T. Nguyen","doi":"10.2514/6.2019-0709","DOIUrl":"https://doi.org/10.2514/6.2019-0709","url":null,"abstract":"","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73888077","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}

{"title":"3D Cloud Modeling using Data Fusion and Machine Learning Techniques","authors":"Manon Huguenin, Gabriel Achour, Domitille Commun, Olivia J. Pinon-Fischer, D. Mavris","doi":"10.2514/6.2019-2266","DOIUrl":"https://doi.org/10.2514/6.2019-2266","url":null,"abstract":"","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75152959","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}

{"title":"Modeling, Analysis and Discussion of Future Airport Noise Scenarios of a Two-Runway Airport","authors":"Felix Will, M. Hornung","doi":"10.2514/6.2019-2089","DOIUrl":"https://doi.org/10.2514/6.2019-2089","url":null,"abstract":"","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75224143","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}

{"title":"A New Vibrational Control System in Nature: Flapping Flight","authors":"H. Taha, M. Kiani","doi":"10.2514/6.2019-1417","DOIUrl":"https://doi.org/10.2514/6.2019-1417","url":null,"abstract":"Vibrational control is an open loop stabilization technique via the application of highamplitude, high-frequency oscillatory inputs. The averaging theory has been the standard technique for designing vibrational control systems. However, it stipulates too high oscillation frequency that may not be practically feasible. Therefore, although vibrational control is very robust and elegant (stabilization without feedback), it is rarely used in practical applications. The only well-known example is the Kapitza pendulum; an inverted pendulum shose pivot is subject to vertical oscillation. the unstable equilibrium of the inverted pendulum gains asymptotic stability due to the high-frequency oscillation of the pivot. In this paper, we provide a new vibrational control system from Nature; flapping flight dynamics. Flapping flight is a rich dynamical system as a representative model will typically be nonlinear, time-varying, multi-body, multi-time-scale dynamical system. Over the last two decades, using direct averaging, there has been consensus in the flapping flight dynamics community that insects are unstable at the hovering equilibrium due to the lack of pitch stiffness. In this work, we perform higher-order averaging of the time-periodic dynamics of flapping flight to show a vibrational control mechanism due to the oscillation of the driving aerodynamic forces. We also experimentally demonstrate such a phenomenon on a flapping apparatus that has two degrees of freedom: forward translation and pitching motion. It is found that the time-periodic dynamics of the flapping micro-air-vehicle is naturally (without feedback) stabilized beyond a certain threshold. Moreover, if the averaged aerodynamic thrust force is produced by a propeller revolving at a constant speed while maintaining the wings stationary at their mean positions, no stabilization is observed. Hence, it is concluded that the observed stabilization in the flapping system at high frequencies is due to the oscillation of the driving aerodynamic force and, as such, flapping flight indeed enjoys vibrational stabilization.","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75503298","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}

{"title":"Towards single shot gas flow velocity and temperature measurements with coherent Rayleigh-Brillouin scattering","authors":"A. Gerakis, M. Shneider","doi":"10.2514/6.2019-1326","DOIUrl":"https://doi.org/10.2514/6.2019-1326","url":null,"abstract":"","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75636543","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}

{"title":"Nonlinear (Lyapunov) Stability of the Space Launch System Flight Control System with Adaptive Augmenting Control","authors":"M. Balas, T. VanZwieten, M. Hannan","doi":"10.2514/6.2019-2337","DOIUrl":"https://doi.org/10.2514/6.2019-2337","url":null,"abstract":"","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75651307","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}

{"title":"Probabilistic Control Optimization of Aeroservoelastic Systems with Uncertainty","authors":"Liam J. Adamson, S. Fichera, J. Mottershead","doi":"10.2514/6.2019-1754","DOIUrl":"https://doi.org/10.2514/6.2019-1754","url":null,"abstract":"Aprobabilistic-based control optimizationmethod is developed for aeroservoelastic systems with parameter uncertainties. Genetic algorithms are used to find optimal feedback control gains that simultaneously assign a mean flutter speed andmaximize a defined worst-case speed. In the proposed approach, a surrogatemodel of the flutter speed response surface is constructed so that the critical flutter speed is represented in terms of the uncertain parameters. The surrogate model is created in two ways: 1) by linearization of the response surface using local sensitivities, and 2) by a polynomial chaos expansion. The surrogate model is then sampled to find the worst-case flutter speed, which is defined probabilistically by the inverse cumulative distribution function. The method is applied to a three-degree-of-freedom aeroservoelastic system that uses an unsteady, two-dimensional potential flow and explicitly contains the control and actuator dynamics. Case studies with uncertainty in the pitch and plunge stiffness parameters are presented. It is demonstrated that the control gains have a strong influence on the shape of the response surface and that it is possible to control not only the expectation, but also the variance of the flutter speed.","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"220 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75760546","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}

{"title":"Flamelet Modeling of Transverse Thermo-Acoustic Instability in a Multi-Element Combustor","authors":"Tejas Pant, Haifeng Wang","doi":"10.2514/6.2019-1235","DOIUrl":"https://doi.org/10.2514/6.2019-1235","url":null,"abstract":"","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75868577","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}

{"title":"Extension of local cavity operators to 3d+t space-time mesh adaptation","authors":"P. Caplan, R. Haimes, D. Darmofal, M. Galbraith","doi":"10.2514/6.2019-1992","DOIUrl":"https://doi.org/10.2514/6.2019-1992","url":null,"abstract":"","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"255 Pt 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75874009","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}

{"title":"Comparing the effect of geometry and stiffness on the effective load paths in non-symmetric laminates","authors":"Sergio Minera Rebulla, M. Patni, P. Weaver, A. Pirrera, M. P. O’Donnell","doi":"10.2514/6.2019-1766","DOIUrl":"https://doi.org/10.2514/6.2019-1766","url":null,"abstract":"","PeriodicalId":93407,"journal":{"name":"AIAA Atmospheric Flight Mechanics Conference 2019 : papers presented at the AIAA SciTech Forum and Exposition 2019, San Diego, California, USA, 7-11 January 2019. AIAA SciTech Forum and Exposition (2019 : San Diego, Calif.)","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74419434","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}