Bibliographies thématiques / Autogiro

Littérature scientifique sur le sujet « Autogiro »

Auteur : Grafiati

Publié le 14 mars 2023

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Articles de revues sur le sujet "Autogiro"

Bagiev, Marat, et Douglas G. Thomson. « Handling Qualities Assessment of an Autogiro ». Journal of the American Helicopter Society 55, n^o 3 (1 juillet 2010) : 32003–3200311. http://dx.doi.org/10.4050/jahs.55.032003.

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Leishman, J. Gordon. « Development of the Autogiro : A Technical Perspective ». Journal of Aircraft 41, n^o 4 (juillet 2004) : 765–81. http://dx.doi.org/10.2514/1.1205.

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Fernández-Martínez, M., et Juan L. G. Guirao. « On the Stability of la Cierva’s Autogiro ». Mathematics 8, n^o 11 (15 novembre 2020) : 2032. http://dx.doi.org/10.3390/math8112032.

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In this paper, we rediscover in detail a series of unknown attempts that some Spanish mathematicians carried out in the 1930s to address a challenge posed by Mr. la Cierva in 1934, which consisted of mathematically justifying the stability of la Cierva’s autogiro, the first practical use of the direct-lift rotary wing and one of the first helicopter type aircraft.

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López-Díez, J., C. Cuerno-Rejado et J. L. López-Ruiz. « Historical rotorcraft restoration : The C-30 Autogiro ». Proceedings of the Institution of Mechanical Engineers, Part G : Journal of Aerospace Engineering 213, n^o 2 (février 1999) : 71–80. http://dx.doi.org/10.1243/0954410991532855.

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Thomson, Douglas G., Stewart S. Houston et Vassilios M. Spathopoulos. « Experiments in Autogiro Airworthiness for Improved Handling Qualities ». Journal of the American Helicopter Society 50, n^o 4 (1 octobre 2005) : 295–301. http://dx.doi.org/10.4050/1.3092866.

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Bagiev, Marat, et Douglas G. Thomson. « Handling Qualities Evaluation of an Autogiro Against the Existing Rotorcraft Criteria ». Journal of Aircraft 46, n^o 1 (janvier 2009) : 168–74. http://dx.doi.org/10.2514/1.37289.

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Szwedziak, Katarzyna, Tomasz Lusiak, Zaneta Grzywacz et Kacper Drozd. « Numerical CFD Analysis of an Aerodynamic Head Cover of a Rotorcraft Motor ». Communications - Scientific letters of the University of Zilina 20, n^o 3 (30 septembre 2018) : 42–47. http://dx.doi.org/10.26552/com.c.2018.3.42-47.

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Autogyros can become an alternative for the use of rotorcrafts in various fields of life, including agroforestry. They have better economic performance than helicopters, owing to, among other things, the presence of a bearing rotor. Most autogyros also have other advantages in terms of no need for the compliance with stringent regulatory regulations – with respect to new constructions, lower combustion, noise and emissions of toxic elements. The cover of the bearing rotor head is an important element of rotorcrafts, which demonstrates that aerodynamics plays an important role in aerodynamic designs. Therefore, in this article, air flow model testing is carried out for two types of the bearing rotor blades of an autogyro with and without a cover using the ANSYS Fluent program. An aerodynamic drag analysis was also performed.

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González Canomanuel, M. A. « El desconocido autogiro ambulancia de 1933, una innovación española predecesora en una década a la primera utilización del helicóptero sanitario ». Sanidad Militar 71, n^o 2 (juin 2015) : 125–31. http://dx.doi.org/10.4321/s1887-85712015000200011.

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Wilby, P. G. « Shockwaves in the rotor world — a personal perspective of 30 years of rotor aerodynamic developments in the UK ». Aeronautical Journal 102, n^o 1013 (mars 1998) : 113–28. http://dx.doi.org/10.1017/s0001924000065404.

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Tonight we commemorate the achievements of Juan de la Cierva, the great pioneer of rotary aviation. His development of the autogyro stimulated the development of the early rotor theories and paved the way for the modern helicopter. In turning the autogyro into a practical aircraft, Cierva proved to be an innovator prepared to take an unconventional approach. He was at the same time pragmatic in that he really wanted to build a helicopter but realised that the required technology was not yet mature, and settled on the autogyro as representing what was an achievable concept. His concept was thus unconventional, dramatic and achievable — an admirable combination. However, in his first attempts to fly an autogyro he rapidly came up against the problem that faces all rotory wing designers — which is that the advancing blade has a much greater lifting potential than the retreating blade, due to the difference in dynamic head. This led him to introduce the flapping hinge that allowed the rotor to achieve roll balance as well as providing the backward tilt of the rotor that is necessary for autorotation. Having made this step forward, he realised that the introduction of blade camber would allow the retreating blade to achieve higher angles of incidence before stalling, but in so doing he built in a potentially dangerous control characteristic.

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González-Solórzano, Fiorella. « PLAN PILOTO DE INCORPORACIÓN DE AUTOGIRAS EN EL MODELO DE EVALUACIÓN COMO BUENA PRÁCTICA EN ALGUNAS DE LAS ASIGNATURAS DE LA CÁTEDRA DE TECNOLOGÍA AGROINDUSTRIAL, PROGRAMA DE INGENIERÍA AGROINDUSTRIAL, UNED. » Revista Electrónica Calidad en la Educación Superior 8, n^o 1 (30 mai 2017) : 288–310. http://dx.doi.org/10.22458/caes.v8i1.1789.

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El artículo expone la autogira como una experiencia académica y una buena actividad en las cinco asignaturas que tienen dos prácticas de laboratorio en la Cátedra de Tecnología Agroindustrial. La autogira es una actividad que se le ofrece al estudiante como alternativa, y que es evaluada de manera sumativa; además, se pretende que se convierta en una motivación más para determinar su afinidad con las diferentes áreas de las tecnologías en las que trabajará en su futuro como profesional. Anteriormente, para llevar a cabo la gira de campo, era necesario coincidir en día (sábado) y hora (mañana) todos los estudiantes del país. Por lo tanto, se propuso la autogira, por medio de la cual los estudiantes de forma independiente pudieran desplazarse a industrias del campo, según asignatura, supermercados y mercados, entre otros lugares. Esta buena práctica tiene la flexibilidad y autorregulación de tiempo y espacio para el estudiante y sin costo extra. Asimismo, con ésta los estudiantes conocen el medio laboral, los equipos, la materia prima, el procesamiento, al igual que interiorizar las Buenas Prácticas de Manufactura (BPM), y relacionar la teoría y los contenidos en contexto. Si se pretende incorporar esta buena práctica en asignaturas de otras cátedras, se recomienda incluir una rúbrica y una guía de gira para los estudiantes, así como aportarles posibles lugares de gira y una carta de la Cátedra respectiva para el lugar visitado, como medio de aprobación de la autogira.PILOT PLAN OF INCORPORATION OF AUTOMATICS IN THE EVALUATION MODEL AS GOOD PRACTICE IN SOME OF THE SUBJECTS OF THE AGROINDUSTRIAL TECHNOLOGY CHART, PROGRAM OF AGROINDUSTRIAL ENGINEERING, UNED.AbstractThe article exposes the autogira as an academic experience and a good activity in the five subjects that have two laboratory practices in the Chair of Agroindustrial Technology. The autogira is an activity that is offered to the student as an alternative, and is evaluated summatively; In addition, it is intended to become a further motivation to determine its affinity with the different areas of the technologies in which it will work in its future as a professional. Previously, to carry out the field tour, it was necessary to match in day (Saturday) and time (tomorrow) all the students of the country. Therefore, the autogira was proposed, by means of which the students of independent form could move to industries of the field, according to subject, supermarkets and markets, among other places. This good practice has the flexibility and self-regulation of time and space for the student and at no extra cost. In addition, students are familiar with the work environment, equipment, raw materials, processing, as well as internalize Good Manufacturing Practices (BPM), and relate theory and content in context. If it is intended to incorporate this good practice in subjects of other chairs, it is recommended to include a rubric and a tour guide for students, as well as to provide possible places of tour and a letter of the respective Chair for the place visited, as a means of approval Of the autogira.Keywords: Agro industrial Engineering; good practice; autogira; self-regulation; authentic assessment; academic assessment.

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Thèses sur le sujet "Autogiro"

Costa, Nuno Rafael Carapina e. « Estudo aerodinâmico e estrutural de um autogiro ». Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/10703.

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Mestrado em Engenharia Mecânica
O trabalho apresentado teve como principal objetivo a caracterização dos problemas aerodinâmicos e estruturais a serem observados no projeto de um Autogiro. Numa primeira etapa do trabalho, alguns conceitos básicos dos princípios da aerodinâmica que gera forças durante o voo destas aeronaves são delineadas. Numa segunda parte os componentes integrantes de um autogiro são modelados, onde alguns serão examinados por elementos finitos. Seguidamente foi realizado um cálculo á sustentação da asa, de modo a que o autogiro consiga levantar voo. Posteriormente, realizaram-se cálculos em algumas ligações aparafusadas, que se consideraram ser mais importantes para a intensidade das forças. Este cálculo teve como o objetivo, determinar se as ligações aparafusadas respeitam o critério de segurança. Finalmente, executou-se uma análise em elementos finitos na estrutura e no rotor, de maneira a avaliar o comportamento em termos da distribuição de tensões. Nesta etapa final também foi realizada uma análise às vibrações do autogiro, determinando as frequências naturais na estrutura e asa do rotor.
The work presented had as main goal the characterization of the problems of the aerodynamics and structural parameterization to be observed in the design of Autogyrus or Gyroplanes flight vehicles. In a first step, some basic concepts of the principles of aerodynamics that generates forces during the flight of these machines are outlined. In a second step, the integrating parts of the autogyrus are modeled, where some will be examined by finite element analysis. Then a calculation on the wing lift was performed, so that the autogiro can take the flight. After, calculations were performed in some bolted connections, considered to be most important for the forces intensity. This calculation had as objective to determine whether the bolted connections accomplished safety criteria. Finally, it was performed a finite element analysis in the structure and rotor, in order to evaluate the performance in terms of stress distribution. In this final stage it was also conducted an analysis of vibrations, determining the natural frequencies in the structure and rotor wing during its rotation.

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TUFAROLO, EMANUELE. « Sviluppo di un aeromobile prototipale attrezzato per il remote sensing multi-parametrico : sperimentazione del sotto-sistema fotogrammetrico in differenti morfologie e applicazioni ». Doctoral thesis, Università di Siena, 2018. http://hdl.handle.net/11365/1056591.

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Airborne remote sensing is so far one of the most important application in the general field of remote sensing. Since from the first aircrafts, different film cameras were used to acquire images lately treated by a photogrammetric approach. The airborne remote sensing potentials are generally opposed to the high cost normally associated to this activity and to the need of high specialized operators for fieldwork and laboratory processing. In the last years, several factors have allowed an increase in the number of users of airborne remote sensing data; among these, it is important to mention the development of processing techniques based on Computer Vision (CV) and the Structure from Motion (SfM) algorithms, the increase of simplicity and power of the remote sensing software, the exponential growth of computing power, and the relative low price of modern workstations. Main goals of this PhD research project are: 1) the development and optimization of a manned prototypal aircraft agile, economical and functional for multi-parametric scientific survey; 2) the acquisition, processing, presentation and accuracy validation of different datasets acquired thanks to the developed aircraft. The device is, technically, an autogyro called “RadGyro” for its initial use in natural radioactivity survey. The autogyro is extremely agile, quite inexpensive, and with a high load capacity (actual maximum payload reaches about 100 kg). In the first phase, during the construction and optimization of the RadGyro, the scientific instrumentation, used in the second phase of the project, was implemented. The second phase was carried out by testing potentials and limits of the system through the experience derived from the most significant case studies. The focus was on the photogrammetric sub-system, but lateral activity has concerned the use of a thermo-camera and of a hyperspectral visible/near infrared pushbroom scanner. The photogrammetric sub-system was assessed trough different case studies in order to check the quality of the processed products; by the creation of Digital Elevation Models (DEM), Digital Terrain Models (DTM) and ortophotos, it was possible to update the existing maps also minimizing the operator interpretation of landforms thanks to a high resolute and spatially continuous acquisition. The RadGyro and the SfM techniques allowed reducing to few days fieldwork activities necessary for traditional topographic survey by GNSS (Global Navigation Satellite System) and Total Station. It is impossible, for the traditional topographic survey to reach a 3D point clouds density as high as the one reachable by the application of image matching techniques, except using terrestrial or airborne LIDAR (Light Detection and Ranging). However, to obtain high positional accuracy, the survey with geodetic instrument of well distributed GCPs (Ground Control Points) still remains indispensable. The class of the Inertial Measurement Unit (IMU) and GPS (Global Positioning System) receivers affects the quality of the acquired data: this accuracy can be considered sufficient in navigation, surveying and pre-processing phases, but when centimetric accuracy is requested (quite typical for an photogrammetric flight), at least a post-processing correction or a field topographic acquisition of GCPs are needed. Aerial photogrammetry by means of RadGyro and SfM gave worthy results also in multi-temporal monitoring, with the big plus that the survey of many sites of interest has been possible only by a single low-altitude flight. The actual configuration of the RadGyro can be used, with good results, in areas where surface ranges between some square kilometres to many dozens of square kilometres. This is especially true when the costs and acquisition times required of a UAV (Unmanned Aerial Vehicle) flight are too high or when the accessibility of the site is complicated for traditional terrestrial surveys. Beside the validation of the photogrammetric sub-system, also sensors operating in the thermal and visible-near infrared range are now operative in the RadGyro thanks to parallel activities that allowed to develop ad hoc software, to make test flights and to complete the implementation of a workflow relative to data processing. At the end of the PhD research project, all these sensors are integrated and operational on board.

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Rigsby, James Michael. « Stability and control issues associated with lightly loaded rotors autorotating in high advance ratio flight ». Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26536.

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Thesis (Ph.D)--Aerospace Engineering, Georgia Institute of Technology, 2009.
Committee Chair: J.V.R. Prasad; Committee Member: Daniel P. Schrage; Committee Member: David A. Peters; Committee Member: Dewey H. Hodges; Committee Member: Lakshmi N Sankar. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Robinson, Sophie. « Taming the autogyro : will the autogyro ever be truly domesticated ? » Thesis, University of Liverpool, 2014. http://livrepository.liverpool.ac.uk/2006919/.

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Aviation is a pastime enjoyed by many amateur pilots. Of the 21 000 aircraft registered in the UK [1], 96% are engaged in general aviation activities (non-commercial flying). The UK Civil Aviation Authority (UK CAA) classifies microlights, gliders and autogyros as recreational sports aircraft. Of the 21 000 UK-registered general aviation aircraft, only 306 are autogyros, compared to over 4300 microlights and almost 2600 gliders. Despite this fact, the autogyro has been seen to exhibit a fatal accident rate up to 100 times higher than those of the microlight or glider. In response to the identification of this high accident rate amongst autogyro type vehicles, the CAA commissioned a programme of research intended to understand the cause. This research, undertaken in the UK by the University of Glasgow, consisted of analytical, wind tunnel and flight test activities. These studies concluded that the autogyro displayed “conventional lateral and directional dynamic stability characteristics”, and that both the static and dynamic stability (in particular, a lightly damped phugoid mode) was highly sensitive to the vertical position of the centre of gravity (c.g.) relative to the propeller thrust line. The lack of provision within the autogyro community to collect meaningful data in relation to the airworthiness requirements was also highlighted. Outside of the work performed as part of the research programme that generated this report, there is still considered to be “little indication that rigorous scientific or engineering investigation of airworthiness has occurred”. Therefore, there remains significant scope for further research into just what makes autogyros so unsafe to fly and how to improve their airworthiness. Prior research into the autogyro and its aerodynamic characteristics can be broadly divided into two phases, the first being from its inception in 1923 to the beginning of World War II and the period between 1996 and the present day, when a resurgence of interest in the autogyro began to occur. Much of the early works concentrate on characterising the autogyro’s aerodynamic characteristics, relying heavily upon wind tunnel testing, flight testing and analytical investigation to establish an understanding of the fundamental flight dynamics of the autogyro. With the first flight of the first functional helicopter, the outbreak of World War II and the death of the inventor of the autogyro, research interest in this aircraft type was critically diminished. Only three papers on the subject of autogyros were published between 1939 and 1996. The Air Accident Investigation Branch (AAIB) review of the airworthiness of the grounded Air Command autogyro, conducted after the occurrence of 5 fatal accidents between 1989 and 1991, recommended the commissioning of a programme of research into both the airworthiness and aerodynamic characteristics of light autogyros. As a result of this recommendation, the autogyro experienced a resurgence in research interest, culminating in the publication of a CAA Paper which presented 4 recommendations intended to improve the airworthiness of the autogyro: 1. It is recommended that the vertical location of the centre of gravity (c.g.) should lie within a ± 2 inch envelope of the propeller thrust line. 2. Horizontal tailplanes are largely ineffective in improving the long term pitch dynamic stability (phugoid mode). 3. Extreme manoeuvring can lead to excessive rotor teeter angles during certain phases of flight, potentially resulting in the rotor blades striking the prop or empennage. 4. The chordwise centre of gravity of the rotor blades should always lie at or ahead of the 25% chord position to prevent rotor blade instability. One of the primary aims of this Thesis was to assess the validity and applicability of these recommendations; in order to do so, a simulation model of an autogyro was created. The model was based on the G-UNIV research autogyro owned by Glasgow University and validated against flight test data in order to ensure the required level of fidelity was achieved. Upon re-assessing the recommendations, in some cases, different conclusions were drawn. The first recommendation, while accepted as a sensible design aim, was found to be overly restrictive. BCAR Section T, the airworthiness specification for autogyros, specifies requirements on the period and time to half amplitude of any longitudinal oscillations present in the aircraft. Limiting the vertical position of the centre of gravity to within ±2 inches of the propeller thrustline resulted in forcing a design which is compliant with the requirements of BCAR Section T outside the specified range, to become non-compliant when the centre of gravity lies within the range. Recommendation 2 suggests that the removal of the tailplane of the aircraft has little impact on the longitudinal trim control positions and the characteristics of the phugoid mode. It was found that the results from the simulation model disagreed with this conclusion; the removal of the tailplane changed the characteristics of the phugoid model and the trimmed control positions significantly. The third recommendation highlighted the potential for a rotor blade to strike the propeller or the empennage under extreme manoeuvring. The simulation environment provided a safe environment in which to test this recommendation; it was found under the loading of an extreme manoeuvre it was possible for the main rotor to strike the tail, supporting the conclusion drawn in CAA Report 2009/02. It was not possible to assess the fourth and final recommendation, relating the positioning of the chord-wise position of the blade centre of gravity, due to the limitations of the simulation model developed. Another focus of the recent work surrounding the autogyro has been on quantifying and assessing the handling qualities of such vehicles. This presents many challenges, including the fact that no autogyro-specific handling qualities specifications currently exist. One of the main themes of this Thesis was to progress towards the creation of such a specification, either through development of a new methodology or development of existing specifications, such as ADS-33E-PRF. The first steps in this field have been taken by Glasgow University using ADS-33; the primary specification used in the assessment of military rotorcraft. Assessment of the autogyro was previously carried out in a real-world flight trial using existing Mission Task Elements (MTEs) taken from ADS-33, the Slalom and the Acceleration-Deceleration. The results from this trial were then used to derive proposed Level 1, 2 and 3 boundaries for quickness and pilot attack. This Thesis replicated this trial using real-time piloted simulation, and the method described in the work carried out by Glasgow University was also utilised to derive a set of predicted handling qualities Levels for both quickness and pilot attack. It was found that the predicted Level boundaries generated from the simulation trial did not agree well with those predicted in the original flight trial. There were several reasons for this; in the original flight trial the pilot used a non-standard technique to fly the Slalom manoeuvre, using sideslip to complete the test course. Additionally, both the original flight trial and the simulated flight trial used data from several different course geometries. This resulted in the ordering of the Level boundaries being reversed for the Levels predicted by the simulated flight trial, as those test points carried out on the more aggressive course geometries received lower handling qualities ratings, whilst using the most aggressive control inputs, compared to those on easier courses which used lower magnitude and aggression inputs, and thus a lower quickness, while receiving better handling qualities. Recommendations were made to address these issues in future iterations of this work.

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Ahmad, Shah Shahrul. « Improved autogyro flying qualities using automatic control methods ». Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/39052/.

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An autogyro or Autogiro is a unique type of rotary-wing aircraft that was successfully flown in the 1920s, many years before the first helicopter came to service. As far as the rotorcraft technology is concerned, the technical issues addressed by autogyros were eventually rectified and paved the way for the success of helicopter development. When helicopter became more popular and accepted in the civil aviation industry in the 1940s, autogyros were nearly forgotten and the popularity slowly diminished. The re-emergence of autogyros in the last two decades in hobby and sports flight activities, however, coincides with bad safety records due to stability issues. At the time of this writing, there are no specific flying qualities standards to be em- ployed as guidelines to design a light autogyro with good stability attributes. The only requirements available are addressed in the BCAR Section T airworthiness standard for light autogyros which only prescribes some basic dynamic stability requirements for the vehicle. For existing conventional light autogyros which mostly of 'home-built' type, complying with the airworthiness standards would be an issue as most of them were built beforehand. From these concerns, this Thesis aims to improve the flying qualities performance of existing light autogyros through automatic flight control methods, as one of the ways to practically achieve the required performance. Consequently, specific flying qualities requirements for light autogyros must first be proposed as preliminary guidelines for design and flying qualities improvement. A generic mathematical model of light autogyros named ARDiS is developed based on the 'multiblade' simulation ap- proach which is computationally cost-effective. This model was successfully validated against real autogyro flight data and later implemented in the control enhancement of the vehicle. The control enhancement was developed using classical approaches with limitation in size and simplicity of the vehicle as a light aircraft. Proper actuation control hard- ware was separately modelled and deployed into the autogyro to demonstrate a higher dynamics in the control mechanism so that a more realistic attitude behaviour of the vehicle is presented. This control enhancement was successfully evaluated with both, linear and nonlinear simulations according to the proposed autogyro flying qualities attributes. All presented results signify a higher possibility of improving the flying qualities of currently used and future built light autogyros through control enhance- ment.

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Schank, Troy C. « Optimal aeroelastic trim for rotorcraft with constrained, non-unique trim solutions ». Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22654.

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Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2008.
Committee Chair: Dimitri N. Mavris; Committee Co-Chair: Daniel P Schrage; Committee Member: David A. Peters; Committee Member: Dewey H. Hodges; Committee Member: J.V.R. Prasad.

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FLANET, MARIE-DOMINIQUE. « Medecin et habitat groupe autogere ». Lille 2, 1988. http://www.theses.fr/1988LIL2M365.

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F, Torgerson Joshua. « Simulation and control design of a gliding autogyro for precision airdrop ». Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32456.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2005.
Includes bibliographical references (p. 93-94).
Precision airdrop is a technology whose required capabilities have become more exacting as combat situations necessitate greater degrees of accuracy. Ballistic and parafoil type delivery vehicles do not have the capacity to consistently deliver a payload on, for example, a particular rooftop in an urban combat situation. A gliding autogyro delivery platform has been investigated as a means of achieving greater airdrop performance. The autogyro has similar gliding characteristics to the parafoil, but has improved wind resilience and control authority. An initial simulation, based on momentum and blade element helicopter theory, has been constructed. A classical controller using a multiple loop closure strategy has been developed that uses a new nonlinear guidance law to follow paths generated by an algorithm considering initial conditions. An extended Kalman filter is used for state estimation. Results from simulations show consistent accuracy of about 5 feet, with the final position error rarely exceeding 10 feet.
by Joshua F. Torgerson.
S.M.

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Oliver, Michael 1981. « A parametric analysis of the start-up procedure and flight characteristics of a gliding autogyro ». Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/28910.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2005.
"CSDL-T-1503, digital appendix"--CDROM label. Appendix B of thesis text contains an index to the CDROM.
Includes bibliographical references (p. 113-114).
Currently, Draper Laboratory is in the development stages of a gliding autogyro airdrop system. The goal of the project is to design a platform capable of placing small, high value items into urban terrain. Theoretically, autogyros can achieve descent rates and glide slopes similar to current parafoil based systems, but do so with greater precision. Over the past half-century most rotorcraft research has focused on helicopter design, only viewing autorotation as a means of achieving emergency landings. In contrast, this project utilized early rotor theory to develop algorithms which can predict unpowered rotor performance across the entire flight envelope. To validate these predictions, a vertical wind tunnel capable of testing rotors up to 4 feet in diameter at descent rates of up to 25 ft/s was constructed. Emphasis was also placed on developing deployment sequences that would allow the system to achieve stable autorotation autonomously. By varying parameters such as blade pitch angle and rotor solidity, it is shown that in the proper configuration, rotor based systems can match and even surpass parafoils in areas such as descent rate and glide slope. The autogyro also has the added capability of varying its lift-to-drag ratio in flight while maintaining reasonable descent speeds, allowing for more precise control to the target. Possible deployment sequences are displayed, proving that relatively simple configurations can be brought into stable autorotation. The algorithms developed and vertical wind tunnel constructed for this project can be used to gain further knowledge of autogyro performance.
by Michael Oliver.
S.M.

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Vukmanic, Jankovic Sanja. « L' environnement et l'aménagement du territoire dans un système autogéré : l'exemple yougoslave ». Paris 1, 2001. http://www.theses.fr/2001PA010018.

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La société humaine demeure toujours, et probablement plus que jamais, à la recherche des principes fondamentaux qui impliqueraient la réalisation de la société humaine de demain, système juste, libéral et humaniste, performant sur le plan socio-économique (basé sur les principes de la décentralisation, mais aussi ceux de la complémentarité et de la réciprocité, donc inévitablement cohérent dans son ensemble, et dont l'intégrité, la stabilité et la régulation seraient assurées par un cadre institutionnel, étique et politique adapté, ce qui en ferait une vraie société humaine du progrès, pros- père et humaniste, mais dont objectif suprême ne serait plus l'État ni le culte de l'argent, mais l'être humain). Dans ce contexte, l'environnement en tout sens, en tant que logique fondamentale et essentielle à l'existence et à la pérennité de l'espèce humaine, devient besoin et valeur incontournable, et synonyme de l'avenir. Et comme la vision théorique de la société autogérée, semblait pouvoir se rapprocher de ces critères, (par ses principes théoriques de base), son analyse plus approfondie, en tant qu'expérience ré- elle, semblait légitime. Pour évaluer la place de l'environnement dans le développement autogéré, il s'agissait donc de faire un bilan (basé sur une documentation exhaustive), de la situation et gestion environnementale yougoslave, des politiques et législations mises place. Compte tenu la diversité des facteurs définissant le contexte général de l'autogestion, analyser les causes et les conséquences de la fracture grandissante séparant deux logiques en présence: celle de la gestion réelle des biens naturels et espaces du pays, et celle de l'ambition audacieuse et vision théorique autogestionnaire (issue de ses principes de base), inconséquence qui empêchera le système autogéré, brisé par des contradictions, de développer globalement ses potentiels du progrès, par la multiplication des choix plus judicieux.

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Livres sur le sujet "Autogiro"

Ord-Hume, Arthur W. J. G. Autogiro : Rotary wings before the helicopter. Petersfield : Mushroom Model, 2009.

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Autogiro : The story of "the windmill plane". Fallbrook, CA : Aero Publishers, 1985.

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Cierva, Juan de la. Wings of tomorrow : The story of the autogiro. [New York] : Brewer, Warren, & Putnam, 1988.

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Harold F. Pitcairn : Aviator, inventor, and developer of the autogiro. Bryn Athyn, Pa : Bryn Athyn College Press, 2009.

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From autogiro to gyroplane : The amazing survival of an aviation technology. Westport, Conn : Praeger, 2003.

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Howell, Patrick. Gyroplane flying for beginners : A guide to getting your gyro license. [Warwickshire, U.K : Patrick Howell, 2000.

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Hollmann, Martin. Flying the gyroplane. Cupertino, Calif. (11082 Bel Aire Ct., Cupertino 95014) : M. Hollmann, 1986.

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Brooks, Peter W. Cierva Autogiros : The development of rotary-wing flight. Washington, D.C : Smithsonian Institution Press, 1988.

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Lescarbeau, Robert. Devenir consultant : Instrument autogéré de formation. Montréal, Qué : Presses de l'Université de Montréal, 1985.

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Peter, Ernst. Tragschrauber, hubschrauer : Osterreichs pioniere. Graz : H. Weishaupt Verlag, 1985.

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Chapitres de livres sur le sujet "Autogiro"

Song, Ziwei, Zhihao Cai, Kunpeng Li, Jiang Zhao et Ningjun Liu. « Model and Attitude Control of a Miniature Hybrid Autogyro ». Dans Lecture Notes in Electrical Engineering, 751–60. Singapore : Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6445-6_82.

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Ahmad, Shahrul, et Douglas Thomson. « Validation of Rotor-Disc Model for Light Autogyro in Steady-State Flight Mode ». Dans Lecture Notes in Mechanical Engineering, 481–92. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4756-0_42.

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Hou, Jiajia, Xiuming Liu, Mo Chen, Pengyu Zhang, Wen Xiao et Meng Lin. « Grey Wolf Optimization-Based Active Disturbance Rejection Controller Design for a Hybrid Autogyro ». Dans Lecture Notes in Electrical Engineering, 2227–38. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8155-7_187.

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Liu, Juanxia, Donghui Liu, Pengcheng Dong et Qing Lin. « Flight Control Scheme of Unmanned Autogyro Based on Active Disturbance Rejection Control Theory ». Dans Proceedings of 2022 International Conference on Autonomous Unmanned Systems (ICAUS 2022), 2254–63. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0479-2_210.

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Palladino, Dottore Luciano. « Fenomenologia del “temps vécu” durante il training autogeno di base o somatico ». Dans Moderne Suggestionsverfahren, 334–38. Berlin, Heidelberg : Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-662-08807-4_40.

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Cohn-Bendit, Gabriel. « Au lycée autogéré de Saint-Nazaire ». Dans Les citoyennetés scolaires, 237. Presses Universitaires de France, 2003. http://dx.doi.org/10.3917/puf.meiri.2003.01.0237.

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Krop, Jérôme. « Chapitre 3. Les élèves dans l’effervescence des débats pédagogiques : le lycée autogéré d’Oslo à la télévision française, 1975-1982 ». Dans Histoire des élèves en France, 79–98. Presses universitaires du Septentrion, 2020. http://dx.doi.org/10.4000/books.septentrion.97197.

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Juan, Maïté. « De l’expérimentation culturelle citoyenne au contre-pouvoir : vers une « Nouvelle Institutionnalité » ? Le cas du centre socioculturel autogéré La Casa Invisible ». Dans Expérimentations démocratiques, 165–92. Presses universitaires du Septentrion, 2022. http://dx.doi.org/10.4000/books.septentrion.128767.

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Actes de conférences sur le sujet "Autogiro"

Gellida-Coutino, C., V. Dominguez-De La Cruz, A. Sanchez-Orta, O. Garcia-Salazar et P. Castillo. « The tailsitter autogiro UAV : modeling, design, and CFD simulation ». Dans 2022 International Conference on Unmanned Aircraft Systems (ICUAS). IEEE, 2022. http://dx.doi.org/10.1109/icuas54217.2022.9836091.

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Rimkus, Sigitas, et Tuhin Das. « An Application of the Autogyro Theory to Airborne Wind Energy Extraction ». Dans ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3840.

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Auto-rotation or autogyro is a well-known phenomenon where a rotor in a wind field generates significant lift while the wind induces considerable aerodynamic torque on the rotor. The principle has been studied extensively for applications in aviation. However, with recent works indicating immense, persistent, and pervasive, available wind energy at high altitudes, the principle of autogyro could potentially be exploited for energy harvesting. In this paper, we carry out a preliminary investigation on the viability of using autogyros for energy extraction. We mainly focus on one of the earliest documented works on modeling of autogyro and extend its use to explore energy harvesting. The model is based on blade element theory. We provide simulation results of the concept. Although the results are encouraging, there are various practical aspects that need to be investigated to build confidence on this approach of energy harvesting. This work aims to build a framework upon which more comprehensive research can be conducted.

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Cohen-Shapira, Noy, Lior Rokach, Bracha Shapira, Gilad Katz et Roman Vainshtein. « AutoGRD ». Dans CIKM '19 : The 28th ACM International Conference on Information and Knowledge Management. New York, NY, USA : ACM, 2019. http://dx.doi.org/10.1145/3357384.3357896.

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Chen, Jingfan, Guanghui Zhu, Haojun Hou, Chunfeng Yuan et Yihua Huang. « AutoGSR ». Dans SIGIR '22 : The 45th International ACM SIGIR Conference on Research and Development in Information Retrieval. New York, NY, USA : ACM, 2022. http://dx.doi.org/10.1145/3477495.3531940.

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McCormick, Barnes. « A Numerical Analysis of Autogyro Performance ». Dans 2002 Biennial International Powered Lift Conference and Exhibit. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-5950.

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Saraf, Parang, et Naren Ramakrishnan. « EMBERS AutoGSR ». Dans KDD '16 : The 22nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining. New York, NY, USA : ACM, 2016. http://dx.doi.org/10.1145/2939672.2939737.

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Vainilavicius, Darius, Vygantas Augutis, Marius Malcius et Aurimas Bezaras. « Analysis of autogyro rotor balancing and vibration ». Dans 2015 IEEE Metrology for Aerospace (MetroAeroSpace). IEEE, 2015. http://dx.doi.org/10.1109/metroaerospace.2015.7180693.

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Jensen, D. « Un-manned autogyro for cinematography and reconnaissance ». Dans 1st AIAA, Aircraft, Technology Integration, and Operations Forum. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-5228.

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Flores, Jonathan, Sergio Salazar et Rogelio Lozano. « Hybrid autogyro : Airborne wind gust energy conversion using autorrotation ». Dans 2019 International Conference on Unmanned Aircraft Systems (ICUAS). IEEE, 2019. http://dx.doi.org/10.1109/icuas.2019.8797941.

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Petritoli, Enrico, et Fabio Leccese. « Unmanned Autogyro for Advanced SAR Tasks : a Preliminary Assessment ». Dans 2020 IEEE 7th International Workshop on Metrology for AeroSpace (MetroAeroSpace). IEEE, 2020. http://dx.doi.org/10.1109/metroaerospace48742.2020.9160111.

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