Готові списки джерел за темами / Rotor Modelling

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Добірка наукової літератури з теми "Rotor Modelling"

Автор: Grafiati

Опубліковано: 10 березня 2023

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Статті в журналах з теми "Rotor Modelling"

Fletcher, T. M., and R. E. Brown. "Modelling the interaction of helicopter main rotor and tail rotor wakes." Aeronautical Journal 111, no. 1124 (October 2007): 637–43. http://dx.doi.org/10.1017/s0001924000004814.

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Abstract The mutual interaction between the main rotor and tail rotor wakes is central to some of the most problematic dynamic phenomena experienced by helicopters. Yet achieving the ability to model the growth and propagation of helicopter rotor wakes with sufficient realism to capture the details of this interaction has been a significant challenge to rotorcraft aerodynamicists for many decades. A novel computational fluid dynamics code tailored specifically for rotorcraft applications, the vorticity transport model, has been used to simulate the interaction of the rotors of a helicopter with a single main rotor and tail rotor in both hover and low-speed quartering flight, and with the tail rotor rotating both top-forward and top-aft. The simulations indicate a significant level of unsteadiness in the performance of both main and tail rotors, especially in quartering flight, and a sensitivity to the direction of rotation of the tail rotor. Although the model thus captures behaviour that is similar to that observed in practice, the challenge still remains to integrate the information from high fidelity simulations such as these into routine calculations of the flight dynamics of helicopters.

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Flannigan, Callum, James Carroll, and William Leithead. "Operations expenditure modelling of the X-Rotor offshore wind turbine concept." Journal of Physics: Conference Series 2265, no. 3 (May 1, 2022): 032054. http://dx.doi.org/10.1088/1742-6596/2265/3/032054.

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Abstract O&M of an offshore wind farm is becoming increasingly challenging as farms are being commissioned further from shore. Weather windows are more difficult to navigate leading to longer downtime for turbines. The X-Rotor offshore wind turbine concept directly tackles these O&M challenges by, amongst other advantages, removing the requirements for components that have traditionally contributed high failure rates, repair times and downtimes, and by placing the heavy and expensive machinery closer to sea level. The turbine also benefits from having modular small rotors that can be quickly replaced and repaired onshore, and being able to operate at reduced capacity when there are failures in the modular rotors. This paper presents the StrathX-OM OpEx model. This model features changes to OpEx modelling that will allow for comprehensive analysis of the operations and maintenance costs for a wind farm made up of radical X-Rotor wind turbines with the flexibility to handle changing designs as the technology progresses. The calculation of lifetime O&M costs for a wind farm 100 km from shore showed that the X-Rotor has lower O&M costs than conventional HAWTs for an established design. A sensitivity study on the estimated failure rates of X-Rotor is also presented. This shows that even with significantly over-estimated failure rates the X-Rotor would still be competitive in today’s market.

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Ilie, K., and A. Subic. "Parametric modelling of helical rotors for efficient design of twin-screw superchargers." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 221, no. 2 (February 1, 2007): 267–72. http://dx.doi.org/10.1243/0954406jmes421ft.

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The parametric three-dimensional geometric model of twin-screw supercharger rotors of any aspect ratio was developed. For model validation through visualization, computer-aided design (CAD) rotor models with scalable data were generated in commercial CAD software and calibrated experimentally by laser Doppler velocimetry (LDV) tests. Calibrated rotor profile data can be transferred into CAD-CFD interface for flow simulation for performance optimization.

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Park, J. S., and S. N. Jung. "Comprehensive multibody dynamics analysis for rotor aeromechanics predictions in descending flight." Aeronautical Journal 116, no. 1177 (March 2012): 229–49. http://dx.doi.org/10.1017/s0001924000006813.

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AbstractThis paper studies the rotor aeromechanics in descending flight using a nonlinear flexible multibody dynamic analysis code, DYMORE. A freewake model is included in DYMORE to improve the rotor wake modelling. The wind-tunnel test data of the Higher-harmonic Aeroacoustics Rotor Test (HART) II rotor, with and without higher harmonic pitch control (HHC), and the flight test data of the full-scale utility helicopter rotor in descent are used for the aeromechanics correlation at an advance ratio of 0·15. The blade-vortex interaction (BVI) airloads are reasonably predicted for both the HART II and utility helicopter rotors, although some BVI peaks are missed on the advancing sides for both the rotors. The flap deflections and elastic torsion deformations at the blade tip are fairly correlated against the measured data of the HART II rotor. The correlation of blade structural moments for both HART II and utility helicopter rotors are not as good as the lift predictions; however, a reasonable prediction is obtained for the utility helicopter rotor.

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Bartlett, H., and R. Whalley. "Distributed rotor dynamics." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 212, no. 4 (June 1, 1998): 249–65. http://dx.doi.org/10.1243/0959651981539442.

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The modelling, simulation and analysis of powered rotors with ‘long’ thin shells is investigated. General results enabling the prediction of the torsional vibrational signature of high-speed assemblies under acceleration or braking conditions are outlined. It is demonstrated that simulated response characteristics can be easily obtained and the effect of varying the rotor geometry can be routinely accommodated. Finally, a rotor for a high-speed paper manufacturing unit is investigated and the torsional behaviour of the assembly is computed. The volatile transient conditions presented are commented upon.

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Torija, Antonio J., Zhengguang Li, and Paruchuri Chaitanya. "Psychoacoustic modelling of rotor noise." Journal of the Acoustical Society of America 151, no. 3 (March 2022): 1804–15. http://dx.doi.org/10.1121/10.0009801.

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The aviation sector is rapidly evolving with more electric propulsion systems and a variety of new technologies of vertical take-off and landing manned and unmanned aerial vehicles. Community noise impact is one of the main barriers for the wider adoption of these new vehicles. Within the framework of a perception-driven engineering approach, this paper investigates the relationship between sound quality and first order physical parameters in rotor systems to aid design. Three case studies are considered: (i) contra-rotating versus single rotor systems, (ii) varying blade diameter and thrust in both contra-rotating and single rotor systems, and (iii) varying rotor–rotor axial spacing in contra-rotating systems. The outcomes of a listening experiment, where participants assessed a series of sound stimuli with varying design parameters, allow a better understanding of the annoyance induced by rotor noise. Further to this, a psychoacoustic annoyance model optimised for rotor noise has been formulated. The model includes a novel psychoacoustic function to account for the perceptual effect of impulsiveness. The significance of the proposed model lies in the quantification of the effects of psychoacoustic factors, such as loudness as the dominant factor, and also tonality, high frequency content, temporal fluctuations, and impulsiveness on rotor noise annoyance.

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Dutt, J. K., and H. Roy. "Viscoelastic modelling of rotor—shaft systems using an operator-based approach." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 1 (June 11, 2010): 73–87. http://dx.doi.org/10.1243/09544062jmes2064.

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Damping exists in every material in varying degrees, so materials in general are viscoelastic in nature. Energy storage, as well as dissipation in varying degrees, accompanies every time-varying deformation, with the effect that stress and strain in a material get out of phase. This work presents the development of equations of motion of a rotor—shaft system with a viscoelastic rotor after discretizing the system into finite elements. Subsequently, these equations are used to study the dynamics of the rotor—shaft system in terms of stability limit of spin speed and time response of a disc as a result of unbalance. The primary inspiration for a viscoelastic model arises from the need to capture the influence of broad band spectral behaviour of rotor—shaft materials, primarily polymers and polymer composites, which are principally the materials of light rotors, on the dynamics of rotor—shaft system. For this, the material constitutive relationship has been represented by a differential time operator. Use of operators enables one to consider general linear viscoelastic behaviours, represented in the time domain by multi-element (three, four, or higher elements) spring—dashpot models or internal variable models, for which, in general, instantaneous stress and its derivatives are proportional to instantaneous strain and its derivatives. Again such representation is fairly generic, in a sense that the operator may be suitably chosen according to the material model to obtain the equations of motion of a rotor—shaft system. The equations so developed may be easily used to find the stability limit speed of a rotor—shaft system as well as the time response when the rotor—shaft system is subjected to any dynamic forcing function.

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Cîrciumaru, G., R.-A. Chihaia, N. Tănase, L.-A. El-Leathey, and A. Voina. "Increasing energy efficiency of counter-rotating wind turbines by experimental modelling." IOP Conference Series: Materials Science and Engineering 1235, no. 1 (March 1, 2022): 012064. http://dx.doi.org/10.1088/1757-899x/1235/1/012064.

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Abstract With the significant advance in exploiting wind energy, there has been a shift in research from the study of conventional systems to the study of counter-rotating systems due to additional energy input of the second rotor. The paper presents the results of the research on achieving an increase in the energy efficiency of counter-rotating wind power conversion systems. For this purpose, there have been designed different sizes of wind rotors, were 3D printed and tested in an open-circuit aerodynamic tunnel for different wind velocities and axial distances between rotors. The constructive design consisting of a smaller diameter front rotor and a larger rear rotor was chosen. The individual wind rotors were used to configure two experimental models of counter-rotating wind systems. The testing results analysis and interpretation enabled the establishing of the design and operating conditions that provide the highest power extracted from wind at 10 m/s velocity. A higher efficiency of the wind turbine system is achieved for a lower ratio between the front and rear turbines. In the case of the analysed experimental models, an increase in system efficiency of 49.14% is achieved for a 0.845 diameter ratio, and of 39.02% for 0.945 diameter ratio, respectively.

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Ellin, Lt Cdr A. D. S. "Lynx Main Rotor/Tail Rotor Interactions: Mechanisms and Modelling." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 208, no. 2 (July 1994): 115–28. http://dx.doi.org/10.1243/pime_proc_1994_208_261_02.

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A flight trial has been conducted by the Defence Research Agency (DRA) Bedford using a Lynx AH Mk5 helicopter fitted with an instrumented tail rotor to collect data on tail rotor aerodynamic performance. The analysis carried out to date has concentrated on the effects of main rotor wake interactions on the tail rotor. This paper describes the trial and the analysis in broad outline and discusses in detail mechanisms to explain three out of the six main rotor/tail rotor interactions found. The modelling of these effects to improve the fidelity of ground-based flight simulation is also covered.

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Chen, Jiajia, Fanfu Yin, Xinkai Li, Zhaoliang Ye, Wei Tang, Xin Shen, and Xiaojiang Guo. "Unsteady aerodynamic modelling for dual-rotor wind turbines with lifting surface method and free wake model." Journal of Physics: Conference Series 2265, no. 4 (May 1, 2022): 042055. http://dx.doi.org/10.1088/1742-6596/2265/4/042055.

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Abstract A time-marching aerodynamic model for dual-rotor wind turbines (DRWT) is presented with the lifting surface method and free wake model. The performance of a reference DRWT by two axial connected NREL 5MW wind turbines is calculated to verify the algorithm. The output converges with remarkable oscillation. Free wakes swell under the coupling effect. The accumulated power of DRWT outranges single-rotor wind turbine (SRWT) by a limited extent under certain operating conditions. The front rotor (FR) produces the major portion of the power, especially for low inflow velocity. The unsteadiness of performance and spanwise load is further investigated, and the result shows that the power output of the rear rotor (RR) undergoes greater fluctuation than FR. The rotor-rotor induction strengthens both the rotors’ performance before they align and weakens it when they rotate away. The additional disturbance caused by FR’s tip vortices acts negatively on RR’s torque by upwashing the blade tip.

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Дисертації з теми "Rotor Modelling"

ANNA, RICARDO E. SILVA DE SANT. "ROTOR ACCIDENT ANALYSIS: MODELLING AND SIMULATION." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11885@1.

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A Dissertação aqui apresentada descreve um acidente em um rotor de máquina de grande porte (compressor de ar) de uma fábrica de fertilizante cujas conseqüências foram perdas financeiras de alta monta tanto para a empresa quanto para o Estado, pela importância econômica onde a fábrica é situada. O objetivo da Dissertação foi simular matematicamente o acidente ocorrido e esclarecer o mesmo. Para se chegar ao diagnóstico do problema se modelou o rotor e o discretizou pelo Método de Elementos Finitos. As técnicas de investigação do problema e a sua seqüência de investigação podem ser tomadas como base em investigação de eventuais acidentes envolvendo rotores futuramente. O capítulo relativo a Análise Modal será extraído como base de apostila para curso envolvendo pessoal da área de Manutenção Mecânica.
A problem related with an air compressor gave birth to the MSc Thesis. Problems related with rotative machines are usual in the industrial field. Difficulties come from the data gathering in order to analyze, and propose a theory of failure in order to explain and avoid the recurrence of such problem. Modelling a rotor with a Timoshenko beam element and the discretization by finite element method permit the dynamical analysis and the modal analysis of the rotor considering its interaction with the radial and thrust bearings (assuming stiffness and rigidity). The work is divided in seven chapters: chapter one introduces the work and gives the overview of it; chapter two describes the industrial problem; chapter three is a brief explanation of bearing types and the fundamental principle of lubrication; chapter four introduces vibration theory and modal analysis; chapter five introduces the finite element method; chapter six is the simulation of the problem, using tailor-made MATLABr programs to reconstruct the problem and to compare the test field results with the here mentioned formulation; chapter seven discusses the results and proposes future works. Appendix shows the kinetic theory and the beam deformation model used in the program and the Laval simple rotor as a limited description of the dynamic of a rotor with distributed mass, rigidity and stiffness. The aim of this work is to help understand and avoid the recurrence of the failure described and to easy the understanding of modal analysis for new engineers and technicians which will deal with rotor dynamics.

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Bréus, Elsa. "Finite elements modelling of rotor flapping mass." Thesis, KTH, Lättkonstruktioner, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-224154.

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In the frame of increasing flight safety, finite element models are developed to computethe stresses in critical parts. The results obtained often complete the ones derived from fullscale experimental tests and analytical estimations. A finite element model is particularlyuseful to simulate many different flight configurations that can not be tested experimentally.This paper presents the different stages in the development of a finite element model ofa rotor flapping mass. On a helicopter the flapping mass makes the connection betweenblades and rotor hub. This study particularly focuses on the estimation of the fatiguelimit of a composite component. This component, called roving winding, is particularlycritical as it sustains most of the loads applied on the flapping mass. Getting an accuraterepresentation of the stress distribution in the roving was the main objective. The resultsderived from the model presented here were compared to experimental ones to ensure itsaccuracy. The confidence in the model obtained makes possible its use to evaluate theimpact of some material change or geometry modifications. The model also permitted toevaluate the impact of some productions defects on a composite part.

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Sadri, Malek Arsalan. "Numerical modelling of rotor/stator interactions in turbomachinery." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/7828.

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Mear-Stone, Leah Isobel. "Theoretical modelling of flow in rotor-stator systems." Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681054.

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The prevention of hot gas ingress between rotating and stationary discs in gas turbines is big business, with experimental and computational research being common in the sector. Experimental rigs, operating at a fraction of the engine size and in simulated fluid dynamic conditions, model the engine environment. Computational Fluid Dynamics (CFD) is used in both academia and industry to model the flow and heat transfer in a turbine. CFD is expensive, time consuming and requires detailed experimental validation. The engine designer has a need for simpler, faster mathematical modelling methods, ultimately to be used in 1D design codes. The research in this thesis stems from this need for the industrial engine designers to be able to predict the flow, pressure and temperatures in the secondary-air-system. Momentum-integral equations are known to model flow over rotating and stationary discs in isolation. This thesis shows that the momentum-integral equations can be solved together, to successfully model the flow inside a rotor and stator cavity. New momentum-integral equations are derived, free of the incorrect assumption that swirl ratio inside a rotor-stator cavity does not vary with radius. Two cavity models are described based upon the momentum-integral equations: one for a closed cavity and one for a cavity with sealing flow and no ingress. Both are computationally fast and are shown to give good agreement with experimental measurements and CFD results. Detailed flow structures are given for a range of rotor-stator cavity cases and the results of the models allow conclusions about the flow structure to be drawn. It is found that the outer region, where flow leaves the rotor and is entrained by the stator, is not affected by sealing flow. As well as complete cavity models, two other models for specific rotor-stator phenomenon have been derived. The effect of ingress on the swirl ratio in the cavity has been modelled, using a momentum balance approach. The buffer ratio and buffering effect, which quantify how the rotor is protected from ingress, have been defined, modelled and validated against measurements of adiabatic effectiveness for four different seal geometries. The model has allowed the calculation of Φ′min,r, the sealing flow rate where the effectiveness on the rotor reaches 95%.

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Gustavsson, Rolf. "Rotor dynamical modelling and analysis of hydropower units /." Luleå: Division of Computer Aided Design, Department of Applied Physics and Mechanical Engineering, Luleå University of Technology, 2008. http://epubl.ltu.se/1402-1544/2008/50/.

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Karlsson, Martin. "Electro-mechanical modelling and analysis of hydroelectric rotor systems." Licentiate thesis, Luleå : Luleå University of Technology, 2006. http://epubl.luth.se/1402-1757/2006/10.

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McDarby, John Michael. "Modelling of turbulent rotor-blade flow and ground effect." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444821/.

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Rotor blade flows occur in numerous physical systems from helicopters to fans, and from propellers to food mixers. Many previous studies have concentrated on the laminar flow generated by a set of rotors but in many practical cases the flow is turbulent, a setting in which previous research appears to be mainly experimental or purely numerical. The thesis examines turbulent rotor flow as its prime feature, before moving on to the impact of the ground and side structures on the flow. Whilst there exists a wide variety of rotor blade flows in industry, the present research is motivated by the application to helicopters. Using asymptotic analysis and computational methods the thesis first examines the turbulent boundary layer on a flat plate with a moving surface and, second, a rotating disc. Analytical and numerical predictions are then derived and compared with previous results. Asymmetry about the axis of rotation is introduced next and the problem of a rotating cut-disc is studied as an approximation to a set of rotors. A numerical solution is obtained and is supported by analytical results. Blade inclination and thickness are then incorporated into the three-dimensional case, with asymmetric blade shape being analyzed as if in two dimensions only. The influence of ground effect is examined firstly through the use of an image potential in the two-dimensional asymmetric blade shape problem and secondly in the axisymmetric case of flow between a stationary and a rotating disc. A numerical solution is determined and compared with existing research, whilst an analytical solution is produced for large radii. The flow between a stationary disc and a rotating cut disc is then briefly discussed before, finally, the possible extension of this thesis to the problem of turbulent jets is examined.

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Abdulqadir, Sherwan Ahmed. "Turbulence modelling for horizontal axis wind turbine rotor blades." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/turbulence-modeling-for-horizontal-axis-wind-turbine-rotor-blades(2536b213-3a0c-4977-ac39-916a9fce98d2).html.

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This Thesis aims to assess the reliability of turbulence models in predicting the flow fields around the horizontal axis wind turbine (HAWT) rotor blades and also to improve our understanding of the aerodynamics of the flow field around the blades. The simulations are validated against data from the NREL/NASA Phase VI wind turbine experiments. The simulations encompass the use of fourteen turbulence models including low-and high-Reynolds-number, linear and non-linear eddy-viscosity models and Reynolds stress models. The numerical procedure is based on the finite-volume discretization of the 3D unsteady Reynolds-Averaged Navier-Stokes equations in an inertial reference frame with the sliding mesh technique to follow the motion of the rotor blades. Comparisons of power coefficient, normalised thrust, local surface pressure coefficients (CP) and the radial variation of the section average of normal force coefficients with published experimental data over a range of tip-speed ratios, lead to the identification of the turbulence models that can reliably reproduce the values of the key performance indicators. The main contributions of this study are in establishing which RANS models can produce quantitatively reliable simulations of wind turbine flows and in presenting the flow evolution over a range of operating conditions. At low (relative to the blade tip speed) wind speeds the flow over the blade surfaces remains attached and all RANS models return the correct values of key performance coefficients. At higher wind speeds there is circumferential flow separation over the downwind surface of the blade, which eventually spreads over the entire surface, Moreover, within the separation bubble the centrifugal force pumps the flow outwards, which at the higher wind speeds suppresses the formation of the classical tip vortices. More refined RANS models which do not rely on the linear effective viscosity approximation generally lead to more reliable predictions over this range of higher wind speeds. In particular the Gibson-Launder version of the Reynolds stress transport model and the high-Re versions of the Lien et al non-linear k-ε produce consistently reliable simulations over the entire range of wind speeds. By contrast some popular linear effective viscosity models, like the SST (k-ω) and the v^2-f, perform the poorest over this complex flow range. Finally all RANS models are also able to predict the dominant (lowest) frequency of the pressure fluctuations and the non-linear effective viscosity models, the Launder and Shima version of RSM and the SST are also able to return some of the higher frequencies measured.

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Sarvat, Mushtaq Ahmad B. "Modelling and control of a twin rotor MIMO system." Thesis, University of Sheffield, 2001. http://etheses.whiterose.ac.uk/14820/.

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In this research, a laboratory platform which has 2 degrees of freedom (DOF), the Twin Rotor MIMO System (TRMS), is investigated. Although, the TRMS does not fly, it has a striking similarity with a helicopter, such as system nonlinearities and cross-coupled modes. Therefore, the TRMS can be perceived as an unconventional and complex "air vehicle" that poses formidable challenges in modelling, control design and analysis and implementation. These issues are the subject of this work. The linear models for 1 and 2 DOFs are obtained via system identification techniques. Such a black-box modelling approach yields input-output models with neither a priori defined model structure nor specific parameter settings reflecting any physical attributes. Further, a nonlinear model using Radial Basis Function networks is obtained. Such a high fidelity nonlinear model is often required for nonlinear system simulation studies and is commonly employed in the aerospace industry. Modelling exercises were conducted that included rigid as well as flexible modes of the system. The approach presented here is shown to be suitable for modelling complex new generation air vehicles. Modelling of the TRMS revealed the presence of resonant system modes which are responsible for inducing unwanted vibrations. In this research, open-loop, closed-loop and combined open and closed-loop control strategies are investigated to address this problem. Initially, open-loop control techniques based on "input shaping control" are employed. Digital filters are then developed to shape the command signals such that the resonance modes are not overly excited. The effectiveness of this concept is then demonstrated on the TRMS rig for both 1 and 2 DOF motion, with a significant reduction in vibration. The linear model for the 1 DOF (SISO) TRMS was found to have the non-minimum phase characteristics and have 4 states with only pitch angle output. This behaviour imposes certain limitations on the type of control topologies one can ado·pt. The LQG approach, which has an elegant structure with an embedded Kalman filter to estimate the unmeasured states, is adopted in this study. The identified linear model is employed in the design of a feedback LQG compensator for the TRMS with 1 DOF. This is shown to have good tracking capability but requires. high control effort and has inadequate authority over residual vibration of the system. These problems are resolved by further augmenting the system with a command path prefilter. The combined feedforward and feedback compensator satisfies the performance objectives and obeys the constraint on the actuator. Finally, 1 DOF controller is implemented on the laboratory platform.

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Karlsson, Martin. "Modelling and analysis of multiphysical interactions in hydropower rotor systems /." Luleå : Polhem Laboratory, Division of Computer Aided Design, Department of Applied Physics and Mechanical Engineering, Luleå University of Technology, 2008. http://epubl.ltu.se/1402-1544/2008/27/.

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Книги з теми "Rotor Modelling"

Larvin, Paul. Static testing and modelling of a small turbine rotor to identify its vibration characteristics. Huddersfield: The Polytechnic, 1990.

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T, Flowers George, Trent Victor S, and United States. National Aeronautics and Space Administration., eds. Dynamic modelling and response characteristics of a magnetic bearing rotor system including auxiliary bearings. [Washington, DC: National Aeronautics and Space Administration, 1993.

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Bachschmid, Nicolò. Cracked rotors: A survey on static and dynamic behaviour including modelling and diagnosis. Berlin: Springer-Verlag, 2009.

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Bachschmid, Nicoló, Paolo Pennacchi, and Ezio Tanzi. Cracked Rotors: A Survey on Static and Dynamic Behaviour Including Modelling and Diagnosis. Springer, 2014.

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Bachschmid, Nicoló, Paolo Pennacchi, and Ezio Tanzi. Cracked Rotors: A Survey on Static and Dynamic Behaviour Including Modelling and Diagnosis. Springer, 2010.

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Частини книг з теми "Rotor Modelling"

Rand, Omri. "Analysis of composite rotor blades." In Numerical Analysis and Modelling of Composite Materials, 1–26. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-0603-0_1.

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Farshadnia, Mohammad. "Analytical Modelling of Rotor Magnetic Characteristics in an Interior Permanent Magnet Rotor." In Springer Theses, 95–126. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8708-0_4.

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Dohnal, Fadi, Eric Knopf, and Rainer Nordmann. "Efficient Modelling of Rotor-Blade Interaction Using Substructuring." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics, 143–53. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_12.

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Javadi, Ardalan, and Håkan Nilsson. "LES and DES of Swirling Flow with Rotor-Stator Interaction." In Progress in Hybrid RANS-LES Modelling, 457–68. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15141-0_37.

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Chudoba, Jan, Viktor Kozák, and Libor Přeučil. "MUAVET – An Experimental Test-Bed for Autonomous Multi-rotor Applications." In Modelling and Simulation for Autonomous Systems, 16–26. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-14984-0_2.

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Li, Zhan-ke, Jiao Guo, Fa-ming Li, Yu-dong Yan, Ying Yang, and Yang Liu. "Structure Modelling and Simulation Analysis of Six-Rotor UAV." In Lecture Notes in Electrical Engineering, 2811–21. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3305-7_227.

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González, Hernando, Carlos Arizmendi, César Valencia, Diego Valle, Brayam Bernal, and Alhim Vera. "Modelling and Control System Design for UAV Tri-Rotor." In Lecture Notes in Electrical Engineering, 84–93. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53021-1_9.

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Bayer, Jan, and Jan Faigl. "Vision-Based Localization for Multi-rotor Aerial Vehicle in Outdoor Scenarios." In Modelling and Simulation for Autonomous Systems, 217–28. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70740-8_14.

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Letzgus, Johannes, Pascal Weihing, Manuel Keßler, and Ewald Krämer. "Assessment of Delayed Detached-Eddy Simulation of Dynamic Stall on a Rotor." In Progress in Hybrid RANS-LES Modelling, 311–21. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-27607-2_25.

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Gomez, Jose L., Adeline Bourdon, Hugo André, and Didier Rémond. "Modelling Roller Bearing Dynamics Inducing Instantaneous Angular Speed Variations." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics, 431–42. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_34.

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Тези доповідей конференцій з теми "Rotor Modelling"

McKerrow, P. "Modelling the Draganflyer four-rotor helicopter." In IEEE International Conference on Robotics and Automation, 2004. Proceedings. ICRA '04. 2004. IEEE, 2004. http://dx.doi.org/10.1109/robot.2004.1308810.

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Dang Huu, Tho, and Idris B. Ismail. "Modelling of Twin Rotor MIMO system." In 2016 2nd IEEE International Symposium on Robotics and Manufacturing Automation (ROMA). IEEE, 2016. http://dx.doi.org/10.1109/roma.2016.7847803.

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Rahim, A. H. M. A., I. O. Habiballah, and E. P. Nowicki. "Performance Evaluation of a DFIG Wind System with Auxiliary Rotor Voltage Control." In Modelling and Simulation. Calgary,AB,Canada: ACTAPRESS, 2010. http://dx.doi.org/10.2316/p.2010.697-001.

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Arredondo, I., J. Jugo, and V. Etxebarria. "Modelling of a flexible rotor maglev system." In 2006 American Control Conference. IEEE, 2006. http://dx.doi.org/10.1109/acc.2006.1655390.

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TOHA, S. F., M. O. TOKHI, and S. MD SALLEH. "PARAMETRIC MODELLING OF A TWIN ROTOR SYSTEM." In Proceedings of the Twelfth International Conference on Climbing and Walking Robots and the Support Technologies for Mobile Machines. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814291279_0037.

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Ishibashi, Tatsuro, Atsushi Yoshida, and Tadao Kawai. "Modelling of Asymmetric Rotor and Cracked Shaft." In The 2nd Japanese Modelica Conference Tokyo, Japan, May 17-18, 2018. Linköping University Electronic Press, 2019. http://dx.doi.org/10.3384/ecp18148180.

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Li, Jun, Jie Hong, Yanhong Ma, and Dayi Zhang. "Modelling of Misaligned Rotor Systems in Aero-Engines." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85706.

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Анотація:

Based on the analysis of structural and dynamic characteristics, a dynamic model of flexible rotor system under misalignment and unbalance excitation in aero-engine was developed through Lagrange equations. The model describes the mechanism and influencing factors of nonlinear properties of misaligned rotors. Then some numerical simulations were performed in order to get the vibration response in time and frequency domain. The results suggest that the rotor system and its coupling may behave in a complex and nonlinear way with the excitation of misalignment and unbalance. The response of the system contains 1× and 2× harmonics, and the spectrum signature closely relate to the misalignment magnitude and the distribution of unbalance mass. A series of experiments were also designed to verify the dynamic model. Their characteristics of response are in good agreement.

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Ivanov, Sergiu, and Mihai Radulescu. "Losseless Starting Method For The Wound Rotor Induction Motor." In 26th Conference on Modelling and Simulation. ECMS, 2012. http://dx.doi.org/10.7148/2012-0187-0192.

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Liu, Yu-Hsun, Nan-Chyuan Tsai, and Hsin-Lin Chiu. "Adaptive Fuzzy Kalman Filter Applied for Identification of Rotor/Active Magnetic Bearing Dynamics." In Modelling, Identification and Control. Calgary,AB,Canada: ACTAPRESS, 2013. http://dx.doi.org/10.2316/p.2013.799-024.

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Sinopoli, Lucas, Martin Ordonez, and John E. Quaicoe. "Wind turbine rotor modelling using response surface methodology." In 2010 IEEE 23rd Canadian Conference on Electrical and Computer Engineering - CCECE. IEEE, 2010. http://dx.doi.org/10.1109/ccece.2010.5575133.

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