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Safety Evaluation of Advanced Self-Separation Under Very High En Route Traffic Demand 非常高路途交通需求下的先进自分离安全性评价
J. Aerosp. Inf. Syst. Pub Date : 2015-06-12 DOI: 10.2514/1.I010243
H. Blom, Bert G. J. Bakker
{"title":"Safety Evaluation of Advanced Self-Separation Under Very High En Route Traffic Demand","authors":"H. Blom, Bert G. J. Bakker","doi":"10.2514/1.I010243","DOIUrl":"https://doi.org/10.2514/1.I010243","url":null,"abstract":"Since the “invention” of free flight, the key question is whether airborne self-separation can safely accommodate very high traffic demand. The aim of this paper is to answer this question for en route airspace. Therefore, an advanced airborne self-separation concept of operation is evaluated on safety risk at very high traffic demands. The advanced airborne self-separation concept of operations considered is of the trajectory-based operation type, in the sense that each aircraft manages a conflict-free four-dimensional trajectory intent and broadcasts this to the other aircraft. Complementary to this trajectory-based operation layer, each aircraft makes use of a short-term conflict detection and resolution layer that aims to resolve any remaining problems, such as significant deviations from four-dimensional intents due to wind prediction errors. Safety risk analysis is conducted using advanced techniques in agent-based modeling and rare-event Monte Carlo simulation. The results obtained show that the ad...","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130023071","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: 35
Bioinspired Navigation for a Nonholonomic Mobile Robot 非完整移动机器人的仿生导航
J. Aerosp. Inf. Syst. Pub Date : 2015-06-12 DOI: 10.2514/1.I010294
A. Alaeddini, K. Morgansen
{"title":"Bioinspired Navigation for a Nonholonomic Mobile Robot","authors":"A. Alaeddini, K. Morgansen","doi":"10.2514/1.I010294","DOIUrl":"https://doi.org/10.2514/1.I010294","url":null,"abstract":"This work addresses the problem of navigation of an autonomous flying vehicle using an optic flow sensing approach motivated by the visuomotor system of insects. Here, the state estimation and conflict resolution aspects of this problem are considered. Specifically, the observability of the robot with an arbitrary number of sensors is investigated, and the minimum number of optic flow sensors and the sensor configuration necessary to have an observable system are determined. The system dynamics linearized about a point are not observable, but a nonlinear observability analysis based on Lie derivatives indicates that the sensor measurements provide enough information for estimating the states of the system. A control policy that guarantees a conflict-free path is also described. In this work, planar obstacles are considered, such as walls. The results are demonstrated in simulation.","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125380466","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
Particle Filter with Operational-Scalable Takagi-Sugeno Fuzzy Degradation Model for Filter-Clogging Prognosis 基于可操作可扩展Takagi-Sugeno模糊退化模型的粒子滤波堵塞预测
J. Aerosp. Inf. Syst. Pub Date : 2015-06-08 DOI: 10.2514/1.I010385
T. Sreenuch, Faisal Khan, J. Li
{"title":"Particle Filter with Operational-Scalable Takagi-Sugeno Fuzzy Degradation Model for Filter-Clogging Prognosis","authors":"T. Sreenuch, Faisal Khan, J. Li","doi":"10.2514/1.I010385","DOIUrl":"https://doi.org/10.2514/1.I010385","url":null,"abstract":"In this paper, filter clogging is used as an aerospace integrated vehicle health management case study to demonstrate the proposed prognostic approach. The focus of this paper is on a scalable data-driven degradation model and how it can improve the remaining useful life prediction performance in condition monitoring of a filter component. Instead of overall fitting of the data, a degradation pattern (a parameterized Takagi–Sugeno fuzzy model) is learned from experimental data collected under a range of operating conditions in the proposed approach. The parameter allows the model to scale to fit different degradation profiles, and hence a more accurate model. In real-time condition monitoring, the degradation and model parameter are simultaneously estimated online based on noisy measurement updates using a particle filter. The estimation results show close tracking of the degradation state and good convergence of the model parameter to its real value. The remaining useful life prediction results show low ...","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131086013","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: 7
Optimal Traffic Flow Scheduling Using High-Performance Computing 基于高性能计算的最优交通流调度
J. Aerosp. Inf. Syst. Pub Date : 2015-05-29 DOI: 10.2514/1.I010365
P. Sengupta, J. Kwan, P. Menon
{"title":"Optimal Traffic Flow Scheduling Using High-Performance Computing","authors":"P. Sengupta, J. Kwan, P. Menon","doi":"10.2514/1.I010365","DOIUrl":"https://doi.org/10.2514/1.I010365","url":null,"abstract":"Algorithms for the end-to-end optimized scheduling of aircraft to enhance the efficiency of the National Airspace System are developed. For a given set of flights and desired departing schedules, routes are constructed and unimpeded four-dimensional trajectories are simulated. These trajectories serve as an input to a linear-programming-based approach, and they result in optimized schedules that are deconflicted while assuring adherence to the system capacity constraints. For a large number of flights, the computational effort is formidable and optimization coupled with the Dantzig–Wolfe decomposition technique has been found to be a suitable approach. Techniques for accelerating the decomposition and solver on emerging high-performance computing hardware are discussed. A multithreaded central-processing-unit implementation and a novel implementation on general-purpose graphics processing units show acceleration over a state-of-the-art open-source decomposition-based solver. The acceleration observed can ...","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132274334","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
Retrospective-Cost-Based Adaptive Input and State Estimation for the Ionosphere-Thermosphere 基于回顾成本的电离层-热层自适应输入和状态估计
J. Aerosp. Inf. Syst. Pub Date : 2015-05-29 DOI: 10.2514/1.I010286
Asad A. Ali, A. Goel, A. Ridley, D. Bernstein
{"title":"Retrospective-Cost-Based Adaptive Input and State Estimation for the Ionosphere-Thermosphere","authors":"Asad A. Ali, A. Goel, A. Ridley, D. Bernstein","doi":"10.2514/1.I010286","DOIUrl":"https://doi.org/10.2514/1.I010286","url":null,"abstract":"The upper atmosphere is a strongly driven system in which the global state is rapidly altered by the solar drivers. One of the main drivers of the upper atmosphere is the solar irradiance in the extreme ultraviolet and x-ray bands. The solar irradiance in these bands is proxied by ground-based measurements of F10.7, which is the solar irradiance at the wavelength of 10.7 cm. The problem of estimating F10.7 and physical states in the upper atmosphere is considered by assimilating the neutral density measurements in the global ionosphere–thermosphere model and using retrospective-cost adaptive input and state estimation. Retrospective-cost adaptive input and state estimation is a non-Bayesian estimator that estimates the input by minimizing the difference between the estimator output and the output of the physical system. In this paper, we use retrospective-cost adaptive input and state estimation to estimate F10.7 using simulated data as well as real satellite data.","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125802724","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: 12
Airborne Radar-Based Collision Detection and Risk Estimation for Small Unmanned Aircraft Systems 基于机载雷达的小型无人机系统碰撞检测与风险估计
J. Aerosp. Inf. Syst. Pub Date : 2015-05-29 DOI: 10.2514/1.I010284
L. Sahawneh, James Mackie, Jonathan Spencer, R. Beard, K. Warnick
{"title":"Airborne Radar-Based Collision Detection and Risk Estimation for Small Unmanned Aircraft Systems","authors":"L. Sahawneh, James Mackie, Jonathan Spencer, R. Beard, K. Warnick","doi":"10.2514/1.I010284","DOIUrl":"https://doi.org/10.2514/1.I010284","url":null,"abstract":"Airborne collision detection is a difficult problem due to inherent noise, errors in prediction, and challenges associated with modeling the dynamics of the intruder aircraft. Moreover, onboard limited computational resources, fast closing speeds, and unanticipated maneuvers make it challenging to detect collision without creating too many false alarms. In this paper, an innovative approach is presented to quantify likely intruder trajectories and estimate the probability of collision risk for a pair of aircraft flying at the same altitude and in close proximity given the state estimates provided by an airborne radar sensor. The proposed approach is formulated in a probabilistic framework using the reachable set concept and the statistical data contained in the uncorrelated encounter model developed by Lincoln Laboratory, Massachusetts Institute of Technology. Monte-Carlo-based simulation is used to evaluate and compare the performance of the proposed approach with linearly extrapolated collision-detectio...","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128771662","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: 24
Student Choice and Persistence in Aerospace Engineering 航空航天工程学生的选择与坚持
J. Aerosp. Inf. Syst. Pub Date : 2015-05-05 DOI: 10.2514/1.I010343
Marisa K. Orr, Nichole M. Ramirez, S. Lord, R. Layton, M. Ohland
{"title":"Student Choice and Persistence in Aerospace Engineering","authors":"Marisa K. Orr, Nichole M. Ramirez, S. Lord, R. Layton, M. Ohland","doi":"10.2514/1.I010343","DOIUrl":"https://doi.org/10.2514/1.I010343","url":null,"abstract":"This longitudinal multi-institution study examines student outcomes and demographics in aerospace engineering in the United States over the period of 1987 to 2010. This large sample allows adoption of an intersectional framework to study race/ethnicity and gender together. In this paper, the demographics of students who choose aerospace engineering, their six-year graduation rates, trajectories of students entering and leaving aerospace engineering, and the “stickiness” of the discipline are examined. Hispanic men and women starting in engineering choose aerospace engineering at the highest rates (13.3 and 12.0%, respectively). Aerospace engineering graduation rates lag other disciplines, at best, by nine percentage points among Hispanic females and, at worst, by 24 percentage points among Black females. Retention in aerospace engineering is low for all students, but it is particularly so for Black men and women (both less than 12%). The result is an average of one Black woman graduate per program every 1...","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131756702","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: 10
Test Languages for In-the-Loop Avionics Tests 循环航空电子测试的测试语言
J. Aerosp. Inf. Syst. Pub Date : 2015-04-30 DOI: 10.2514/1.I010151
Alexandru-Robert Guduvan, H. Waeselynck, V. Wiels, G. Durrieu, Yann Fusero, Michel Schieber
{"title":"Test Languages for In-the-Loop Avionics Tests","authors":"Alexandru-Robert Guduvan, H. Waeselynck, V. Wiels, G. Durrieu, Yann Fusero, Michel Schieber","doi":"10.2514/1.I010151","DOIUrl":"https://doi.org/10.2514/1.I010151","url":null,"abstract":"The current state of the art of in-the-loop testing of avionics embedded systems is very heterogeneous, with many different in-house test languages, and it is unable to respond to the evolving needs of the stakeholders in this field. To lay the foundations of more homogeneous test development solutions, this paper offers an overview and analysis of the features of six different test languages. Best practices and pitfalls to avoid are discussed. The analysis focuses on four major categories of features: test organization, abstraction of and access to the system under test interfaces, test language instructions, and time management. Four of the test languages in the sample set are currently employed in the field of avionics. The other two, used, respectively, in the automotive and telecommunications industries, have been chosen for comparison purposes. The paper reports the key findings of the analysis and presents the resulting ongoing research work.","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132631279","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
Prognostic Health-Management System Development for Electromechanical Actuators 机电致动器预后健康管理系统开发
J. Aerosp. Inf. Syst. Pub Date : 2015-03-24 DOI: 10.2514/1.I010171
E. Balaban, A. Saxena, S. Narasimhan, Indranil Roychoudhury, Michael Koopmans, Carl Ott, K. Goebel
{"title":"Prognostic Health-Management System Development for Electromechanical Actuators","authors":"E. Balaban, A. Saxena, S. Narasimhan, Indranil Roychoudhury, Michael Koopmans, Carl Ott, K. Goebel","doi":"10.2514/1.I010171","DOIUrl":"https://doi.org/10.2514/1.I010171","url":null,"abstract":"systemthatdiagnoseselectromechanicalactuatorfaultsandemploysprognosticalgorithmstotrackfaultprogression and predict the actuator’s remaining useful life. The diagnostic algorithm is implemented using a combined modelbased and data-driven reasoner. The prognostic algorithm, implemented using Gaussian process regression, estimates the remaining life of the faulted component. The paperalso covers the selection of fault modes for coverage and methods developed for fault injection. Validation experiments were conducted in both laboratory and flight conditions using a flyable electromechanical actuator test stand. The stand allows test actuators to be subjected to realistic environmental and operating conditions while providing the capability to safely inject and monitor propagation of various fault modes. The paper covers both diagnostic and prognostic run-to-failure experiments, conducted in laboratory and flight conditions for several types of faults. The experiments demonstrated robust fault diagnosis on the selected set of component and sensor faults and high-accuracy predictions of failure time in prognostic scenarios.","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117226390","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: 63
Trajectory Prediction for Vectored Area Navigation Arrivals 矢量区域导航到达的轨迹预测
J. Aerosp. Inf. Syst. Pub Date : 2015-03-17 DOI: 10.2514/1.I010245
Sungkwon Hong, Keumjin Lee
{"title":"Trajectory Prediction for Vectored Area Navigation Arrivals","authors":"Sungkwon Hong, Keumjin Lee","doi":"10.2514/1.I010245","DOIUrl":"https://doi.org/10.2514/1.I010245","url":null,"abstract":"To maximize the capacity of airports by optimally allocating available resources such as runways, the arrival times of individual aircraft need to be computed. However, accurately predicting arrival times is difficult because aircraft trajectories are frequently vectored off the standard approach procedures. This paper introduces a new framework for predicting aircraft arrival times by incorporating probabilistic information for the types of trajectory patterns that will be applied by human air traffic controllers. The major patterns of the trajectories are identified, and the probabilities of those patterns are computed based on the patterns of the preceding aircraft. The proposed method is applied to traffic scenarios in real operations to demonstrate its performance.","PeriodicalId":179117,"journal":{"name":"J. Aerosp. Inf. Syst.","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129472778","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: 46
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