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Letteratura scientifica selezionata sul tema "Flight recovery"

Autore: Grafiati

Pubblicato: 10 agosto 2024

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Articoli di riviste sul tema "Flight recovery"

1

Gawron, Valerie J., e Jeff Peer. "Evaluation of Airplane Upset Recovery Training". Aviation Psychology and Applied Human Factors 4, n. 2 (1 luglio 2014): 74–85. http://dx.doi.org/10.1027/2192-0923/a000059.

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Loss of control is one of the leading factors in hull losses and fatalities in airline aircraft. To reduce the risk of this type of accident, four types of airplane upset recovery training have been developed (ground-based flight simulation, aerobatic flight, ground-based flight simulation with aerobatic flight, and in-flight simulation). These were evaluated during in-flight reenactments of fatal, hull loss airline airplane accidents. A between-subjects design, with five groups of eight nonmilitary pilots flying in their probationary year for airlines, was used to evaluate these types of training. Each group had received a different type of training, including one group that had received no training. Each pilot completed a 1.4-hr evaluation flight in which eight airplane upsets were introduced. For some scenarios, training clearly works – specifically, 39 evaluation pilots recovered from the wind shear upset. But few evaluation pilots used bank to change the direction of the lift vector to recover from nose-high upsets. Further, very few used differential thrust to recover from rudder- or aileron-induced roll upsets (use of alternate controls). Finally, recovery attempts from icing-induced stalls were generally inadequate.

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2

Gee, C., e R. Robertson. "Recovery of the flight system following ablation of the tegulae in immature adult locusts". Journal of Experimental Biology 199, n. 6 (1 giugno 1996): 1395–403. http://dx.doi.org/10.1242/jeb.199.6.1395.

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The capacity of the flight system to recover from ablation of the tegulae was studied in immature adult Locusta migratoria and compared with recovery in mature adults. We ablated the hindwing tegulae or all tegulae in adult locusts either 1 day after the imaginal moult (immature locusts) or 2 weeks after the imaginal moult (mature locusts). We monitored recovery throughout the recovery period by using a stroboscope to measure the wingbeat frequency of tethered locusts. In addition, we measured other parameters of the flight motor pattern using electromyographic electrodes implanted into recovered locusts. Both methods of monitoring recovery yielded the same results. There was no reduction, during adult maturation, in the capacity of the locust flight system to recover from the loss of these proprioceptors. Plasticity of the locust flight system was therefore maintained in the mature adult locust. This suggests that the flight system is not fixed and simply implemented when the locust reaches adulthood, but that the circuitry can be remodelled throughout the animal's life to produce behaviour adapted to the needs and constraints of the individual.

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3

Wang, Nianyi, Huiling Wang, Shan Pei e Boyu Zhang. "A Data-Driven Heuristic Method for Irregular Flight Recovery". Mathematics 11, n. 11 (4 giugno 2023): 2577. http://dx.doi.org/10.3390/math11112577.

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In this study, we develop a data-driven heuristic method to solve the irregular flight recovery problem. Based on operational data from China South Airlines, Beijing, China, we evaluate the importance of a flight in the flight network and the influence of a delay on a flight and its subsequent flights. Then, we classify historical states into three scenarios according to their delay reasons and investigate the recovery patterns for each scenario. Inspired by the results of the data analysis, we develop a heuristic algorithm that imitates dispatcher actions. The algorithm is based on two basic operations: swapping the tail numbers of two flights and resetting their flight departure times. The algorithm can provide multiple recovery plans in real time for different scenarios, and we continue to refine and validate the algorithm for more robust and general solutions through a cost analysis. Finally, we test the efficiency and effectiveness of the recovery method based on the flight schedule, with real and simulated delays, and compare it with two other methods and the recovery actions of dispatchers.

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Shao, Quan, Mengxue Shao, Yunpeng Bin, Pei Zhu e Yan Zhou. "Flight Recovery Method of Regional Multiairport Based on Risk Control Model". Mathematical Problems in Engineering 2020 (29 aprile 2020): 1–18. http://dx.doi.org/10.1155/2020/7105381.

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In the regional multiairport system, the contradiction between the limited operating resources and the large flight flow is serious, and the flight delays can easily lead to the occurrence of unsafe events. This paper investigates the abnormal flight recovery method in regional multiairport system based on risk control. The focus is to reschedule arrival-departure flights in real time with minimized delay time and risk probability. In this study, the risk about terminal area control and scene operation was considered in the analysis of the risk control model (RCM), which includes six key risk points: airspace control, flight conflict, ground service, apron support, ground control, and taxiing conflict. The mathematical model on flight recovery was constructed to solve minimized delay time and risk probability with MSINS (multistart algorithm with intelligent neighborhood selection). The data of a typical regional multiairport system in China were selected for experimental verification in order to compare the RCM with the traditional recovery model (TRM). The experimental results show that first, there are some hidden dangers in the traditional recovery methods of flight delay. Flight conflict and apron support are the risk points that need to be controlled most in the multiairport system. Secondly, for the effective solution with the shortest delay time, the RCM can reduce the overall operation risk of the system, but the flight delay time is a little longer. For the effective solution with the lowest risk probability, RCM can reduce the risk of system operation and the delay time of flights at the same time. Therefore, RCM can improve the security level of the system during abnormal flight recovery and ensure or even improve the recovery efficiency.

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Beer, Jeremy, Bria Morse, Todd Dart, Samantha Adler e Paul Sherman. "Lingering Altitude Effects During Piloting and Navigation in a Synthetic Cockpit". Aerospace Medicine and Human Performance 94, n. 3 (1 marzo 2023): 135–41. http://dx.doi.org/10.3357/amhp.6149.2023.

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INTRODUCTION: A study was performed to evaluate a cockpit flight simulation suite for measuring moderate altitude effects in a limited subject group. Objectives were to determine whether the apparatus can detect subtle deterioration, record physiological processes throughout hypobaric exposure, and assess recovery.METHODS: Eight subjects trained to perform precision instrument control (PICT) flight and unusual attitude recovery (UAR) and completed chamber flights dedicated to the PICT and UAR, respectively. Each flight comprised five epochs, including ground level pressure (GLP), ascent through altitude plateaus at 10,000, 14,000, and 17,500 ft (3050, 4270, and 5338 m), then postexposure recovery. PICT performance was assessed using control error (FSE) and time-out-of-bounds (TOOB) when pilots exited the flight corridor. UARs were assessed using response times needed to initiate correction and to achieve wings-level attitude. Physiological indices included Spo2, heart rate (HR), end tidal O2 and CO2 pressures, and respiration metrics.RESULTS: Seven subjects completed both flights. PICT performance deteriorated at altitude: FSE increased 33% at 17,513 ft and 21% in Recovery vs. GLP. Mean TOOB increased from 11 s at GLP to 60 s in Recovery. UAR effects were less clear, with some evidence of accelerated responses during and after ascent.CONCLUSIONS: The test paradigm was shown to be effective; piloting impairment was detected during and after exposure. Physiological channels recorded a combination of hypoxia, elevated ventilation, and hypocapnia during ascent, followed by respiratory slowing in recovery. Findings indicate precision piloting and respiration are subject to changes during moderate altitude exposure and may remain altered after Spo2 recovers, and changes may be linked to hypocapnia.Beer J, Morse B, Dart T, Adler S, Sherman P. Lingering altitude effects during piloting and navigation in a synthetic cockpit. Aerosp Med Hum Perform. 2023; 94(3):135–141.

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Wang, Jin, Peng Zhao, Zhe Zhang, Ting Yue, Hailiang Liu e Lixin Wang. "Aircraft Upset Recovery Strategy and Pilot Assistance System Based on Reinforcement Learning". Aerospace 11, n. 1 (11 gennaio 2024): 70. http://dx.doi.org/10.3390/aerospace11010070.

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The upset state is an unexpected flight state, which is characterized by an unintentional deviation from normal operating parameters. It is difficult for the pilot to recover the aircraft from the upset state accurately and quickly. In this paper, an upset recovery strategy and pilot assistance system (PAS) based on reinforcement learning is proposed. The man–machine closed-loop system was established and the upset state, such as a high angle of attack and large attitude angle, was induced. The upset recovery problem was transformed into a sequential decision problem, and the Markov decision model of upset recovery was established by taking the deflection change of the control surface as the action. The proximal policy optimization (PPO) algorithm was selected for the strategy training. The adaptive pilot model and the reinforcement learning method proposed in this paper were used to make the aircraft recover from the upset state. Based on the correspondence between the flight state, the recovery method, and the recovery result, the aircraft upset recovery safety envelopes were formed, and the four-level upset recovery PAS with alarm warning, coordinated control, and autonomous recovery modes was constructed. The results of the digital virtual flight simulation and ground flight test show that compared with a traditional single pilot, the aircraft upset recovery strategy, the upset recovery safety envelopes, and the PAS established in this study could reduce the handling burden of the pilot and improve the success rate and effect of upset recovery. This research has certain theoretical reference values for flight safety and pilot training.

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Bratu, Stephane, e Cynthia Barnhart. "Flight operations recovery: New approaches considering passenger recovery". Journal of Scheduling 9, n. 3 (giugno 2006): 279–98. http://dx.doi.org/10.1007/s10951-006-6781-0.

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8

Blue, Rebecca S., Sean C. Norton, Jennifer Law, James M. Pattarini, Erik L. Antonsen, Alejandro Garbino, Jonathan B. Clark e Matthew W. Turney. "Emergency Medical Support for a Manned Stratospheric Balloon Test Program". Prehospital and Disaster Medicine 29, n. 5 (5 settembre 2014): 532–37. http://dx.doi.org/10.1017/s1049023x14000958.

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AbstractIntroductionRed Bull Stratos was a commercial program that brought a test parachutist, protected by a full-pressure suit, in a stratospheric balloon with pressurized capsule to over 127,582 ft (38,969 m), from which he free fell and subsequently parachuted to the ground. Given that the major risks to the parachutist included ebullism, negative Gz (toe-to-head) acceleration exposure from an uncontrolled flat spin, and trauma, a comprehensive plan was developed to recover the parachutist under nominal conditions and to respond to any medical contingencies that might have arisen. In this report, the project medical team describes the experience of providing emergency medical support and crew recovery for the manned balloon flights of the program.MethodsThe phases of flight, associated risks, and available resources were systematically evaluated.ResultsSix distinct phases of flight from an Emergency Medical Services (EMS) standpoint were identified. A Medical Support Plan was developed to address the risks associated with each phase, encompassing personnel, equipment, procedures, and communications.DiscussionDespite geographical, communications, and resource limitations, the medical team was able to implement the Medical Support Plan, enabling multiple successful manned balloon flights to 71,615 ft (21,828 m), 97,221 ft (29,610 m), and 127,582 ft (38,969 m). The experience allowed refinement of the EMS and crew recovery procedures for each successive flight and could be applied to other high altitude or commercial space ventures.BlueRS, NortonSC, LawJ, PattariniJM, AntonsenEL, GarbinoA, ClarkJB, TurneyMW. Emergency medical support for a manned stratospheric balloon test program. Prehosp Disaster Med. 2014;29(5):1-6.

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Fernandez-Montesinos, Aznar M., G. Schram, H. B. Verbruggen e R. A. Vingerhoeds. "Enhancing Flight Safety: Recovery from Windshear". IFAC Proceedings Volumes 31, n. 29 (ottobre 1998): 104–6. http://dx.doi.org/10.1016/s1474-6670(17)38371-4.

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von Kroge, S., EM Wölfel, LB Buravkova, DA Atiakshin, EA Markina, T. Schinke, T. Rolvien, B. Busse e K. Jähn-Rickert. "Bone loss recovery in mice following microgravity with concurrent bone-compartment-specific osteocyte characteristics". European Cells and Materials 42 (13 ottobre 2021): 220–31. http://dx.doi.org/10.22203/ecm.v042a16.

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Space missions provide the opportunity to investigate the influence of gravity on the dynamic remodelling processes in bone. Mice were examined following space flight and subsequent recovery to determine the effects on bone compartment-specific microstructure and composition. The resulting bone loss following microgravity recovered only in trabecular bone, while in cortical bone the tissue mineral density was restored after only one week on Earth. Detection of TRAP-positive bone surface cells in the trabecular compartment indicated increased resorption following space flight. In cortical bone, a persistent reduced viability of osteocytes suggested an impaired sensitivity to mechanical stresses. A compartment-dependent structural recovery from microgravity-induced bone loss was shown, with a direct osteocytic contribution to persistent low bone volume in the cortical region even after a recovery period. Trabecular recovery was not accompanied by changes in osteocyte characteristics. These post-space-flight findings will contribute to the understanding of compositional changes that compromise bone quality caused by unloading, immobilisation, or disuse.

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Più fonti

Tesi sul tema "Flight recovery"

1

Lettovsky, Ladislav. "Airline operations recovery : an optimization approach". Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/24326.

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2

Gee, Christine Elizabeth. "The capacity for functional recovery in the flight system of Locusta migratoria migratorioides". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq22458.pdf.

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3

Walsh, Allan R. "A computer model for in-flight black liquor combustion in a kraft recovery furnace". Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/7060.

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4

Rafi, Melvin. "Response and recovery of an MRAC adaptive flight control system to adverse atmospheric encounters". Thesis, Wichita State University, 2013. http://hdl.handle.net/10057/10642.

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Safety in air transport has always been of paramount importance. The very nature of aircraft navigating through the atmosphere brings with it associated risks and dangers. Some of these dangers are manifested in the form of adverse atmospheric disturbances. Two common examples of these atmospheric disturbances are the microburst and the wake vortex. This thesis explores the response and recovery performance of a General Aviation-based Model Reference Adaptive Control (MRAC) control system when subjected to these atmospheric disturbances. For the microburst condition, an existing 3DOF MRAC controller developed through prior research is integrated with nonlinear aerodynamics and an envelope protection scheme that augments the flight envelope of a Beechcraft Bonanza/CJ-144 as it encounters conditions pursuant to a microburst condition. Through simulation, the envelope protection scheme is shown to improve the chances of safe recovery in the event of a microburst encounter, by limiting the amount of total kinetic energy loss as the aircraft enters the microburst. For the wake vortex condition, an existing 6DOF MRAC controller is used as a baseline, to which a custom-developed 3D wake vortex model is added. Nonlinear components are incorporated into the existing linear aerodynamics, along with an envelope protection scheme. Pilot-in-the-loop simulated flight testing is conducted to evaluate recovery performance under three control modes: controller only, controller with pilot, and pilot only without controller. The control modes with the controller active are shown to yield much better recovery performance in the event of a wake vortex encounter. Additional efforts include the complete development of a MATLAB/Simulink-based 6DOF Aircraft Motion Visualizer and an X-Plane-based external simulation interface, both used as tools to aid in analysis of results and simulated flight testing.
Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Aerospace Engineering

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5

Cunis, Torbjørn. "Modeling, analysis, and control for upset recovery : from system theory to unmanned aircraft flight". Thesis, Toulouse, ISAE, 2019. http://www.theses.fr/2019ESAE0027.

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Le travail effectué au cours de cette thèse tente d’apporter des solutions algorithmiques à la problématique de reprise au décrochage d’un aéronef. A travers de nombreux exemples d’application sur des modèles aérodynamiques, le lecteur pourra appréhender les concepts abstraits présentés dans cette thèse. Alors que la capacité pour un aéronef à revenir à une situation nominale après une sortie du domaine de vol est un élément clé pour les systèmes de transport aérien du futur, les recherches menées dans ce cadre sont encore peu nombreuses. Pourtant,un tel dépassement conduit généralement à une perte de contrôle (dénommée LOC-I), que l’Association du Transport Aérien International (IATA) a classé dans la catégorie des « risques les plus élevés pour l’aviation ». Dans un premier temps, nous avons montré que les modèles polynomiaux habituellement utilisés en théorie des systèmes ne représentent pas fidèlement l’aérodynamique d’un modèle d’avion sur l’ensemble de son enveloppe de vol. Nous avons donc tout d’abord montré qu’un modèle polynomial par morceaux représente avec exactitude les coefficients aérodynamiques pour les angles d’attaque faibles et élevés. Nous avons alors pu étendre à cette classe de systèmes, récentes d’étude de bifurcation et d’analyse de stabilité qui utilisent des techniques de programmation semi-définie basées sur la positivité de polynômes (SOS); nous avons notamment appliqué ces résultats au modèle d’avion de transport générique dénommé GTM. Dans le même esprit, nous avons développé un modèle pour un petit aéronef à voilure fixe basé sur des simulations numériques en mécanique des fluides (CFD). Les coefficients dynamiques n’étant pas déterminés en CFD, nous avons identifié le coefficient d’amortissement du tangage en comparant l’analyse de bifurcation et les données de vol, ce qui nous a permis d’étudier à la fois la dynamique et la stabilité du vol en cas de fort décrochage.Des résultats antérieurs ont montré que les techniques SOS étaient prometteuses pour la certification des lois de commande pour des systèmes non-linéaires, cependant sans avoir été appliqués à l’ingénierie aéronautique. En adaptant ces techniques aux modèles polynomiaux par morceaux,nous avons montré qu’il est désormais possible de les utiliser d’une manière précise mais réalisable sur le plan calculatoire. Ensuite, nous avons synthétisé des lois de commandes linéaires et polynomiales pour la récupération d’un fort décrochage. En outre, nous sommes désormais en mesure d’estimer des régions d’attraction pour des modèles polynomiaux par morceaux; pour cela, nous avons proposé un algorithme amélioré pour l’analyse de stabilité locale des systèmes à commutation, tels que ceux qui sont définis par des splines, rendant ainsi notre travail disponible pour l’analyse et la certification futures de modèles d’avion très fidèles.La commande prédictive basée modèle (MPC) s’est avérée être une approche très efficace lorsque la dynamique du système est fortement non linéaire et soumise à des contraintes d’état qui rendent difficile la récupération après le décrochage. Cependant, pour des systèmes réalistes,il est nécessaire de prendre des précautions afin de prouver rigoureusement la stabilité en boucle fermée. En utilisant la technique SOS, nous avons ainsi montré la stabilité d’une stratégie de récupération d’un fort décrochage visant à minimiser la perte d’altitude. Nous avons aussi montré qu’une telle stratégie de commande permet la récupération d’une spirale infernale en utilisant le simulateur GTM.Les résultats de cette thèse sont donc prometteurs et fournissent de nouvelles approches théoriques pour la modélisation, l’analyse de stabilité et le contrôle de la dynamique des futurs aéronefs ainsi que pour le développement et la certification de systèmes de commande de vol visant a prévenir les accidents dus à la perte de contrôle
Upset flight dynamics are characterised by unstable, highly nonlinear behaviourof the aircraft aerodynamic system. As upsets often lead to in-flight loss-of-control (LOC-I) accidents,it still poses a severe threat to today’s commercial aviation. Contributing to almost everysecond fatality in civil aviation while representing merely 10% of the total accidents (both fataland nonfatal), the International Air Transport Association has classified LOC-I as the “highestrisk to aviation safety”. Considerable effort has been undertaken in response by academics,manufacturers, commercial airlines, and authorities to predict and prevent LOC-I events as wellas recover from upset conditions into the nominal flight envelope. As result, researchers fromboth aeronautical engineering and system theory have made significant contributions towardsaviation safety; however, approaches from engineering and theory are rather disparate. This thesistherefore focuses on the application and transfer of system theoretical results to engineeringapplications.In particular, we have found simple polynomial models for aircraft dynamics, despite commonin the system theoretical literature, failing to represent full-envelope aerodynamics accurately.Advanced fitting methods such as multi-variate splines, on the other hand, are unsuitable forsome of the proposed functional analysis methods. Instead, a simple piecewise defined polynomialmodel proves to be accurate in fitting the aerodynamic coefficients for low and high angles ofattack. State-of-the-art bifurcation analysis and analysis based on sum-of-squares programmingtechniques are extended for this class of models and applied to a piecewise equations of motionof the Generic Transport Model (GTM). In the same spirit, we develop a model for a small,fixed-wing aircraft based on static continuous fluid dynamics (CFD) simulations. In the lackof dynamic coefficients from CFD, we identify a pitch-damping model comparing bifurcationanalysis and flight data that predicts well dynamics and stability of deep-stall flight.Previous developments in sum-of-squares programming have been promising for the certificationof nonlinear dynamics and flight control laws, yet their application in aeronauticalengineering halted. In combination with piecewise polynomial modeling, we are able to re-applythis technique for analysis in an accurate but computationally feasible manner to verify stablerecovery. Subsequently, we synthesise inherently stable linear and polynomial feedback laws fordeep-stall recovery. We further extend the estimation of regions of attraction for the piecewisepolynomial model towards an improved algorithm for local stability analysis of arbitrary switchingsystems, such as splines, thus making our work available for future analysis and certificationof highly accurate algebraic models.With highly nonlinear dynamics and critical state and input constraints challenging upsetrecovery, model-predictive control (MPC) with receding horizon is a powerful approach. MPCfurther provides a mature stability theory contributing towards the needs for flight control certification.Yet, for realistic control systems careful algebraic or semi-algebraic considerationsare necessary in order to rigorously prove closed-loop stability. Employing sum-of-squares programming,we provide a stability proof for a deep-stall recovery strategy minimising the loss ofaltitude during recovery. We further demonstrate MPC schemes for recovery from spiral andoscillatory spin upsets in an uncertain environment making use of the well-known and freelyavailable high-fidelity GTM desktop simulation.The results of this thesis are thus promising for future system theoretic approaches in modeling,analysis, and control of aircraft upset dynamics for the development and certification offlight control systems in order to prevent in-flight loss-of-control accidents

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Rozenbeek, David, e Keyserlingk Erik von. "Recovery and Flight Data Recording System for Free Falling Units Ejected From Sounding Rocket". Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214743.

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The aurora phenomena is a remarkable sight, commonlyrefereed to as polar or northern lights. A previous spaceexperiment SPIDER was dedicated to measure electric fieldsand characterize plasma properties in the aurora, using tenFree Falling Units (FFU) ejected from a sounding rocket. Theexperiment was successful but some problems arose. A newexperiment WOLF is committed to solve those problems andre-doing the experiment.This paper describes the process of developing a new recoveryand flight data recording system for the WOLF experiment, usingheritage from the previous SPIDER experiment. The developedsystem will be used on the upcoming WOLF experiment rocketlaunch in February 2018.The thesis analyzed hardware problems in previous design toimprove robustness and reliability, identified obsolete componentsfor replacement and added functionality for the new system. Anew hardware system was developed with schematics and PCBlayout ready for manufacturing. Also, plans for the firmware wasestablished. In the paper it is discussed about topics that shouldbe considered in the future work in developing the system andhow the system can be re-purposed for similar experiment in thefuture.

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Pratt, Kevin S. "Analysis of VTOL MAV use during rescue and recovery operations following Hurricane Katrina". [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002209.

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Vaaben, Bo, e Jesper Larsen. "Mitigation of airspace congestion impact on airline networks". Elsevier, 2015. https://publish.fid-move.qucosa.de/id/qucosa%3A72734.

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In recent years European airspace has become increasingly congested and airlines can now observe that en-route capacity constraints are the fastest growing source of flight delays. In 2010 this source of delay accounted for 19% of all flight delays in Europe and has been increasing with an average yearly rate of 17% from 2005 to 2010. This paper suggests and evaluates an approach to how disruption management can be combined with flight planning in order to create more proactive handling of the kind of disruptions, which are caused by congested airspace. The approach is evaluated using data from a medium size European carrier and estimates a lower bound saving of several million USD.

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Hallman, L. (Lauri). "Single photon detection based devices and techniques for pulsed time-of-flight applications". Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526210445.

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Abstract In this thesis, a new type of laser diode transmitter using enhanced gain-switching suitable for use with a single photon avalanche diode (SPAD) detector was developed and tested in the pulsed time-of-flight laser range finding (lidar) application. Several laser diode versions were tested and the driving electronics were developed. The driving electronics improvements enabled a pulsing frequency of up to 1 MHz, while the maximum laser output power was about 5–40 W depending on the laser diode dimensions. The large output power is advantageous especially in conditions of strong photon noise emerging from ambient light outdoors. The length of the laser pulse matches the jitter of a typical SPAD detector providing several advantages. The new laser pulser structure enables a compact rangefinder for 50 m distance measurement outdoors in sunny conditions with sub-centimeter precision (σ-value) at a valid distance measurement rate of more than 10 kHz, for example. Single photon range finding techniques were also shown to enable a char bed level measurement of a recovery boiler containing highly attenuating and dispersing flue gas. In addition, gated single photon detector techniques were shown to provide a rejection of fluorescent photons in a Raman spectroscope leading to a greatly improved signal-to-noise ratio. Photonic effects were also studied in the case of a pulsed time-of-flight laser rangefinder utilizing a linear photodetector. It was shown that signal photon noise has an effect on the optimum detector configuration, and that pulse detection jitter can be minimized with an appropriate timing discriminator
Tiivistelmä Tässä työssä kehitettiin uudentyyppinen, tehostettua "gain-switchingiä" hyödyntävä laserdiodilähetin käytettäväksi yksittäisten fotonien avalanche-ilmaisimien (SPAD) kanssa, ja sitä testattiin pulssin lentoaikaan perustuvassa laseretäisyysmittaussovelluksessa. Useita laserdiodiversioita testattiin ja ohjauselektroniikkaa kehitettiin. Ohjauselektroniikan parannukset mahdollistivat jopa 1 MHz pulssitustaajuuden, kun taas laserin maksimiteho oli noin 5–40 W riippuen laserdiodin dimensioista. Suuri lähtöteho on edullinen varsinkin vahvoissa taustafotoniolosuhteissa ulkona. Laserpulssin pituus vastaa tyypillisen SPAD-ilmaisimen jitteriä tarjoten useita etuja. Uusi laserpulssitinrakenne mahdollistaa esimerkiksi kompaktin etäisyysmittarin 50 m mittausetäisyydelle ulkona aurinkoisessa olosuhteessa mm–cm -mittaustarkkuudella (σ-arvo) yli 10 kHz mittaustahdilla. Yksittäisten fotonien lentoaikamittaustekniikan osoitettiin myös mahdollistavan soodakattilan keon korkeuden mittauksen, jossa on voimakkaasti vaimentavaa ja dispersoivaa savukaasua. Lisäksi portitetun yksittäisten fotonien ilmaisutekniikan osoitettiin hylkäävän fluoresenssin synnyttämiä fotoneita Raman-spektroskoopissa, joka johtaa selvästi parempaan signaali-kohinasuhteeseen. Fotoni-ilmiöitä tutkittiin myös lineaarista valoilmaisinta hyödyntävän pulssin kulkuaikamittaukseen perustuvan lasertutkan tapauksessa. Osoitettiin, että signaalin fotonikohina vaikuttaa optimaaliseen ilmaisinkonfiguraatioon, ja että pulssin ilmaisujitteri voidaan minimoida sopivalla ajoitusdiskriminaattorilla

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10

Nikolic, Mark I. "The human-machine teams create, explain, and recover from coordination breakdowns: a simulator study of disturbance management on modern flight decks". The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1092808745.

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Libri sul tema "Flight recovery"

1

E, Hudlicka, e Langley Research Center, a cura di. Flight crew aiding for recovery from subsystem failures. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1990.

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United States. Dept. of the Air Force, a cura di. Civil engineer readiness flight response and recovery handbook. [Washington, D.C.?]: Dept. of the Air Force, 1997.

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Bollendorf, Robert F. Flight of the loon: One family's battle with recovery. Glen Ellyn, IL: College of DuPage Press, 2008.

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Bollendorf, Robert F. The flight of the loon: One family's battle with recovery. Chicago, Ill: ACTA Publications, 1992.

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Hinton, David A. Piloted-simulation evaluation of recovery guidance for microburst wind shear encounters. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.

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Hinton, David A. Piloted-simulation evaluation of recovery guidance for microburst wind shear encounters. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.

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Hinton, David A. Piloted-simulation evaluation of recovery guidance for microburst wind shear encounters. Hampton, Va: Langley Research Center, 1989.

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Hinton, David A. Piloted-simulation evaluation of recovery guidance for microburst wind shear encounters. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.

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Schaefer, Otto. Preliminary system design of a three arm capture mechanism (TACM) flight demonstration article. Huntsville, Ala: National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1993.

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United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., SRI International e Langley Research Center, a cura di. Formal specification and verification of a fault-masking and transient-recovery model for digital flight-control systems. [Washington, D.C.?]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1991.

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Capitoli di libri sul tema "Flight recovery"

1

Pottmeyer, Felix, Viktor Dück e Natalia Kliewer. "Crew Recovery with Flight Retiming". In Operations Research Proceedings 2008, 295–300. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00142-0_48.

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Wan, Yu-jie, Guo-qing Wang e Miao Wang. "Coupling Evaluation Model of Abnormal Flight Recovery Strategy". In 2023 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2023) Proceedings, 672–86. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-3998-1_57.

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Hale, N. Wayne. "Flying the Shuttle: Operations from Preparation through Flight to Recovery". In Space Shuttle Legacy, 173–89. Reston, VA: American Institute of Aeronautics and Astronautics, Inc., 2013. http://dx.doi.org/10.2514/5.9781624102172.0173.0190.

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Zhou, Tianwei, Pengcheng He, Churong Zhang, Yichen Lai, Huifen Zhong e Xusheng Wu. "An Improved Particle Swarm Optimization Algorithm for Irregular Flight Recovery Problem". In Lecture Notes in Computer Science, 190–200. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09677-8_17.

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Wang, Zhurong, Feng Wang, Xinhong Hei e Haining Meng. "The Model of Flight Recovery Problem with Decision Factors and Its Optimization". In Intelligent Computing Theories and Application, 679–90. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95930-6_68.

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Gao, Qiang, Xiaowei Tang e Jinfu Zhu. "Research on Greedy Simulated Annealing Algorithm for Irregular Flight Schedule Recovery Model". In Understanding Complex Systems, 503–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13938-3_44.

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Lüdtke, Andreas, Jan-Patrick Osterloh, Tina Mioch, Frank Rister e Rosemarijn Looije. "Cognitive Modelling of Pilot Errors and Error Recovery in Flight Management Tasks". In Lecture Notes in Computer Science, 54–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11750-3_5.

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Rushby, John. "A Fault-Masking and Transient-Recovery Model for Digital Flight-Control Systems". In Formal Techniques in Real-Time and Fault-Tolerant Systems, 109–36. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-3220-0_5.

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Gan, Xiaobing, Tianwei Zhou, Yuhan Mai, Huifen Zhong, Xiuyun Zhang e Qinge Xiao. "An Improved Fireworks Algorithm for Integrated Flight Timetable and Crew Schedule Recovery Problem". In Lecture Notes in Computer Science, 329–38. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09677-8_28.

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Zhou, Tianwei, Junrui Lu, Wenwen Zhang, Pengcheng He e Ben Niu. "Irregular Flight Timetable Recovery Under COVID-19: An Approach Based on Genetic Algorithm". In Data Mining and Big Data, 240–49. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-7476-1_22.

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Atti di convegni sul tema "Flight recovery"

1

HILL, STEVEN, e TODD MCCUSKER. "COMET Recovery System flight dynamics". In Flight Simulation and Technologies. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-3693.

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MARTIN, C., e S. HILL. "Prediction of aircraft spin recovery". In 16th Atmospheric Flight Mechanics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1989. http://dx.doi.org/10.2514/6.1989-3363.

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LACKEY, J., B. MCNAMARA e M. STEVENS. "F/A-18 departure recovery improvement evaluation". In Flight Simulation and Technologies. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-3671.

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GOUSMAN, K., R. LOSCHKE, R. ROONEY e J. JUANG. "Aircraft deep stall analysis and recovery". In 18th Atmospheric Flight Mechanics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-2888.

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MCCUSKER, TODD, e STEVEN HILL. "Landing dispersions for the Commercial Experiment Transporter Recovery System". In Flight Simulation and Technologies. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-3695.

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FRENCH, K. "Flight test experience with an RPV emergency (parachute) recovery system". In 4th Flight Test Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1988. http://dx.doi.org/10.2514/6.1988-2139.

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Khrabrov, A., M. Sidoryuk e M. Goman. "Aerodynamic model development and simulation of airliner spin for upset recovery". In Progress in Flight Physics, a cura di P. Reijasse, D. Knight, M. Ivanov e I. Lipatov. Les Ulis, France: EDP Sciences, 2013. http://dx.doi.org/10.1051/eucass/201305621.

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Wilson, Charles B., Michael L. Anderson, Michael Hyde e Kent Jensen. "Optical Target Tracking with User Input for Automated RPA Recovery". In AIAA Atmospheric Flight Mechanics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-3709.

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9

Xiuli, Zhao, e Guo Yanchi. "An improved GRASP for irregular flight recovery". In 2012 International Conference on System Science and Engineering (ICSSE). IEEE, 2012. http://dx.doi.org/10.1109/icsse.2012.6257229.

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10

Tu, Zhan, Fan Fei, Matthew Eagon, Dongyan Xu e Xinyan Deng. "Flight Recovery of MAVs with Compromised IMU". In 2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). IEEE, 2019. http://dx.doi.org/10.1109/iros40897.2019.8968145.

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Rapporti di organizzazioni sul tema "Flight recovery"

1

Ferguson, S. T., e J. C. Bryant. Design and Testing of An Airborne Global Positioning System[gps] Navigation and Flight Path Recovery System. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/131486.

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2

Tran, M., W. A. Nicholas, J. Chen, Z. Hong, J. Sohn, T. Whiteway, J. Pugh e C. Thun. Summary of analyses undertaken on debris recovered during the search for flight MH370: a collation of reports describing quarantine and parts analysis undertaken by Geoscience Australia. Geoscience Australia, 2017. http://dx.doi.org/10.11636/record.2017.011.

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