Relevant bibliographies by topics / Speed (rpm)

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Speed (rpm)'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Speed (rpm)"

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Mulyadi, Adi, Muhammad Zainal Rois, Bambang Sri Kaloko, Riska Fita Lestari, R. B. Moch Gozali, and Suprihadi Prasetyono. "Analisis Efisiensi Kinerja Motor BLDC Menggunakan Metode Kontrol Sliding Mode Observer PI." Jurnal Arus Elektro Indonesia 8, no. 3 (2022): 86. http://dx.doi.org/10.19184/jaei.v8i3.34998.

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Brushless DC (BLDC) motors are widely used and applied in industry but it is difficult to control BLDC motors. Basically, a Brusless DC (BLDC) motor or also known as a permanent magnet synchronous motor (PMSM) uses a hall sensor to determine the position and speed of the motor. The data on the value of the BLDC rotor speed (rpm) in the basic modeling of the BLDC motor as input from the sliding mode observer (SMO) method which is set in the BLDC rotor speed (rpm) set point. A sensorless method based on SMO is proposed to replace the hall-sensor device for estimating the rotor position and speed
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Fiqri, M. Shyadul, Taufan Arif Adlie, and Syamsul Bahri Widodo. "Analysis of Spindle Rotation Speed on Turning Results in CQ 6236 Lathe Machine." JURUTERA - Jurnal Umum Teknik Terapan 12, no. 01 (2025): 66–75. https://doi.org/10.55377/jurutera.v12i01.10818.

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The selection of turning speed is very important because the turning process affects the quality of the work, especially in the metal industry and small or medium-sized industries. To meet production needs, the rotational speed of the lathe can be adjusted to various spindle speed levels. Variations in speed will cause the workpiece to differ in terms of flatness and smoothness. The turning process begins with a linear motion along the axis of the AISI 1040 steel workpiece, with a slow feed of 2 mm. Smooth and even results were obtained at speeds of 80 rpm, 105 rpm, 160 rpm, 250 rpm, 380 rpm,
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Akhmadi, Amin Nur, Mukhamad Khumaidi Usman, and Firman Lukman Sanjaya. "Effect of Rotation Speed and Feed on the Surface of ST 41 Steel on a Lathe Machine." IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) 3, no. 3 (2024): 31–41. https://doi.org/10.56862/irajtma.v3i3.157.

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This study discusses the effect of feed rate and machine rotation speed on the surface roughness of ST 41 steel in the flat turning process. The aim is to determine the relationship between variations in rotation speed (100 rpm, 300 rpm, and 500 rpm) and feed rate on the final surface results of the workpiece. The method involves cutting tests on ST 41 steel specimens with a diameter of 25 mm and a length of 400 mm with various rotation speed variations. The results show that at low rotation speed (100 rpm), the surface of the workpiece tends to be rough. The surface becomes better at medium s
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Respati, Sri Mulyo Bondan, Nur Kholis, Helmy Purwanto, and Prasetyo Wibowo. "Optimization of Aluminium Casting with Alumina Reinforcement via Stir Casting: Impact on Physical and Mechanical Properties." Materials Science Forum 1138 (December 17, 2024): 21–28. https://doi.org/10.4028/p-ice3dk.

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Aluminum casting using the stir casting method is a common practice in the industrial sector. This study aims to optimize the effect of stirring speed on the physical and mechanical properties of aluminum casting reinforced with alumina powder (Al2O3). The material used in this study is derived from discarded vehicle rim waste. The stir casting method was performed at varying speeds of 500, 600, and 700 rpm, with a mold temperature of 250°C and a pouring temperature of 700°C. Physical testing to examine the microstructure was conducted using optical metallography, hardness testing was performe
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Insyira, Athalla Rania, Hafizha Nur Athari, Purnama Sukardi, and Rudy Wijaya. "The Effect of Encapsulator Machine Speed ​​on Composite Microcapsule Size." Journal Of Artha Biological Engineering 2, no. 2 (2024): 25–35. https://doi.org/10.62521/s0btxz58.

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Microcapsules are small round particles with uniform walls or layers around them that generally have a diameter from 0.2 to 5000 µm. Microencapsulation is a process that converts solid or liquid materials into capsule form which aims to protect and maintain active ingredients from environmental influences such as humidity, high temperature, light exposure, or oxidation processes. Microcapsule formation can be done using the crosslink method. Microcapsule size is affected by the stirring speed of the encapsulator machine. During microencapsulation of fish meal with eggs and gelatin using the cr
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Et. al., P. S. Mohanasaravanan,. "FEA Analysis of Tvs Sport Alloy Wheel Rim with Various Speed." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 1S (2021): 521–26. http://dx.doi.org/10.17762/turcomat.v12i1s.1919.

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The work is to analysis the structural stability and strength of a low budget Indian two wheeler TVS Sport bike alloy wheel rim in high speed conditions, the alloy wheel rim is holding the tyre and stability of the vehicle, the ANSYS Structural Analysis carried out for various RPM like 500, 1000, 1500 and 2000 RPM the results of stress, strain and deformation results taken for various materials like steel, aluminium and polypropylene
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Masruroh, Masruroh, I. Wayan Wira Yuda, and D. J. Djoko H. Santjojo. "THE EFFECT OF SPIN COATING’S SPEED ON GRAPHENE-OXIDE’S LAYER TOPOGRAPHY AND QCM VISCOELASTICITY." Suranaree Journal of Science and Technology 30, no. 6 (2024): 030156(1–9). http://dx.doi.org/10.55766/sujst-2023-06-e01688.

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Spin coating speed controls the deposition process, affecting the formation of the layer’s topography of graphene oxide and the viscoelastic properties of quartz crystal microbalance (QCM). In this work, the graphene oxide was deposited on the QCM surface by spin coating method with speeds ranging from 500 to 800 rpm. The layer’s surface topography was subsequently measured and analyzed using a roughness multiparameter, which included the area average (Sa), area roughness deviation (Sq), localized surface roughness (Sz), surface skewness (Ssk), and surface kurtosis (Sku). The Sa, Sq, and Sz, w
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Offiong, Alexander A., Aniekan Offiong, A. P. Ihom, and I. E. Markson. "The Effects of a Three-Arm Hammer Cracker/ Beater on the Performance of a Newly Developed Palm Kernel Shell Cracking Machine." Archives of Current Research International 24, no. 6 (2024): 230–40. http://dx.doi.org/10.9734/acri/2024/v24i6781.

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The effects of a 3-arm hammer cracker/ beater on the performance of a newly developed palm kernel shell cracking machine have been determined. The newly developed palm kernel cracker was equipped with a 3-arm hammer beater shaft, and a constant weight of 3000g of palm kernel shells were cracked under various operating speeds ranging from 800- 1600 rpm. During this period the performance of the newly developed machine equipped with the 3-arm hammer beater was evaluated. It was discovered that the 3000g of palm kernel nuts were cracked in just 30.14 seconds at a speed of 1600 rpm. The number of
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Larosa, Albert Hendi Yanto, Yakmuri Lubis, and Burhan Hafid. "Effect of Cutting Speed of Carbon Steel ST 41 on Cutting Temperature in Turning Process." International Journal of Mechanical Computational and Manufacturing Research 13, no. 4 (2025): 129–34. https://doi.org/10.35335/computational.v13i4.197.

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The turning process is one of the most widely used lathe machining techniques in manufacturing, involving the interaction between the machine tool, workpiece, and cutting tool. During cutting, friction between the chisel and the workpiece generates excessive heat, with most cutting energy converted into heat. This study examines the effect of cutting speed on temperature in chisels, chips, and ST41 carbon steel workpieces at various lathe speeds. Using an experimental method, cutting speeds of 260 RPM, 560 RPM, and 800 RPM were tested. Data collected included lathe rotation speed, specimen tem
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Arboleda, Edwin Romeroso. "Design, construction, and evaluation of transformer-based orbital shaker for coffee micropropagation." Journal of Mechatronics, Electrical Power, and Vehicular Technology 13, no. 2 (2022): 147–56. http://dx.doi.org/10.14203/j.mev.2022.v13.147-156.

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This study offers a novel solution to deal with the complicated electronic circuitry for speed controller and too complex mechanical design of rotating mechanism of an orbital shaker. The developed prototype used a transformer that varies the supply voltage to control the speed of rotation of the orbital shaker. The prototype has five speed levels which depend on the input voltage. These speeds are 180 rpm at 12 V, 258 rpm at 15 V, 360 rpm at 18 V, 427 rpm at 21 V, and 470 rpm at 24 V. The prototype was tested to run continuously for 48 hours for each speed level, with speed being measured eve
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Dissertations / Theses on the topic "Speed (rpm)"

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Vemuri, Achyut. "Estimation of Instantaneous Speed for Rotating Systems: New Processing Techniques." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470671420.

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Elkhomri, Othman. "DSP IMPLEMENTATION OF DC VOLTAGE REGULATION USING ADAPTIVE CONTROL FOR 200 KW 62000 RPM INDUCTION GENERAT." Master's thesis, University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2926.

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The thesis discusses the development of closed loop system to control the DC voltage for 200 kW induction generator rated at a speed of 62000 RPM under different load conditions. The voltage regulation has been implemented using PI controller. A gain scheduling control algorithm has been developed to select the appropriate controller gains with respect to the generator load. Further, a relationship between the generator loads and the controller gains has been established. This relationship has been modeled using adaptive control technique to vary the gains automatically at any load condition.
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Sabirin, Chip Rinaldi [Verfasser]. "Digital Control for Active Magnetic Bearings in High-Speed Permanent-Magnet Synchronous Machine with 40000 rpm and 40 kW / Chip Rinaldi Sabirin." Aachen : Shaker, 2014. http://d-nb.info/106619789X/34.

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Miste', Gianluigi. "Variable speed rotor helicopters: optimization of main rotor-turboshaft engine integration." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424123.

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Variable speed rotors (VSRs) represent an innovative research field for the development of new rotorcraft designs. The possibility to change the rotational speed of a helicopter rotor, as a function of the specific flight condition, makes it possible to achieve optimum performance and relevant fuel consumption reductions. However, issues related to employing a main rotor variable speed are numerous and require an interdisciplinary approach. The present study represents the first effort in the open literature aimed at understanding the performance implications of coupling helicopter trim and tu
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Úlehla, Martin. "Mikrokontrolery pro BLDC motory." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235900.

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Master thesis deals with solutions of BLDC motors (brushless DC motors) control. It analyses microcontrollers and electronic components suitable for BLDC motor controllers under conditions of serial production. It mentions some common problems in practical aplication like dynamic motor braking, synchronization, recuperation and constant revolutions.
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Yu, Xuefeng Dai Fa. "High speed ROM-less direct digital frequency synthesizer." Auburn, Ala, 2009. http://hdl.handle.net/10415/1863.

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Van, Horn Charles. "Steady State and Transient Efficiencies of a Four Cylinder Direct Injection Diesel Engine For Implementation in a Hybrid Electric Vehicle." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1154354134.

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Manandhar, Sanjeev. "High Speed ROM for Direct Digital Synthesizer Applications in Indium Phosphide DHBT Technology." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/ManandharSX2006.pdf.

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Brueckner, Frank Peter. "Finite element analysis of high-speed flows with application to the ram accelerator concept." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185417.

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A Petrov-Galerkin method for the solution of the compressible Euler and Navier-Stokes equations is presented. The method is based on the introduction of an anisotropic balancing diffusion in the local direction of the propogation of the scalar variables. The direction in which the diffusion is added and its magnitude are automatically calculated locally using a criterion that is optimal for one-dimensional transport equations. Algorithms are developed using bilinear quadrilateral and linear triangular elements. The triangular elements are used in conjunction with an adaptive scheme using unstr
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Gerald, Matthew R. "DIRECT DIGITAL FREQUENCY SYNTHESIZER IMPLEMENTATION USING A HIGH SPEED ROM ALTERNATIVE IN IBM 0.13u TECHNOLOGY." Wright State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1154850215.

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Books on the topic "Speed (rpm)"

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Krishnan, Radhakrishnan, ed. Computational study of flow establishment in hypersonic pulse facilities. National Aeronautics and Space Administration, Lewis Research Center, Institute for Computational Mechanics in Propulsion, 1995.

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Lisa, Lee. MacWeek upgrading and repairing your Mac. Hayden Books, 1995.

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Rez, Peter. Air Transportation. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198802297.003.0011.

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When an airplane is full, the energy used to travel a given distance compares very favourably with driving an economical car. Primary energy use is less since airplane turbofan engines are more efficient than car engines. Even airplanes with propellers driven by petrol engines are more efficient than cars as the engines are operating at near-peak rpm and producing a higher proportion of the rated power. Air travel uses a lot of energy because it makes travelling long distances easy, even if not very comfortable. The airplane is limited by the weight it can carry, which puts a limit on how tigh
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Speed and Accuracy with Interactive CD-ROM. Almena Keyboard Training Systems, Inc., 2000.

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Wayner, Peter. Java RAMBO Manifesto: RAM-based Objects, Prevayler, and Raw Speed. Flyzone Press, 2003.

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Edgerton, Harold Eugene. Exploring the Art and Science of Stopping Time: A CD-ROM Based on the Life and Work of Harold E. Edgerton (Windows & Mac). The MIT Press, 2000.

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VideoWorkshop for Intro SPED/Inclusion: Student Learning Guide w/CD-ROM. Allyn & Bacon, 2005.

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Reese, Gregory G. The effects of various crank-speeds (60, 80, 100 rpm) on maximal oxygen consumption in trained competitive cyclists. 1986.

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National Aeronautics and Space Administration (NASA) Staff. Performance of Large-Bore Tapered-Roller Bearings under Combined Radial and Thrust Load at Shaft Speeds to 15,000 RPM. Independently Published, 2018.

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Intergalactic Guide to Building an RPG in Unity: Develop a 3D Roleplaying Game in Unity at Warp Speed. Packt Publishing, Limited, 2023.

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Book chapters on the topic "Speed (rpm)"

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Wang, Binqiang, Jianjun Shen, Feng Jia, and Zehang Sun. "Simulation of the Influence of Rotational Speed on the Crushing of Cement Agglomerates." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1876-4_59.

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AbstractThe uniform dispersion of cement agglomerates during the concrete mixing process affects the overall homogeneity of concrete and adversely affects its strength. To investigate the effect of mixing speed on the crushing of cement agglomerates, this article uses the discrete element software EDEM to simulate the process of crushing of cement agglomerates by collision with aggregates during the mixing process. Within the traditional mixing speed, three different mixing speeds are set to study the crushing ratio of cement agglomerates. The results show that, when other parameters are uncha
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Tian, Congfeng, Piqiang Tan, Wenpu Wang, et al. "A Study on the Parameters Matching of Dynamics System Electric Bulldozer." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1876-4_8.

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AbstractIn this paper, the parameter matching of dynamics system electric bulldozer was proposed. Firstly, Structure and parameters of the electric bulldozer were introduced. Secondly, the speed and power of the motor were calculated. Finally, power battery parameter was calculated. The results show the peak torque of the drive motor is 800 N·m, the peak power is 100 kW, the maximum rotational speed is 3000 rpm, the rated rotational speed is 1200 rpm and discharge power of the power battery are 235kw.
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Koch, Lukas, Felix Butz, Gordana Krüger, and Frank Döpper. "Thermal Modeling Challenges of High-Speed Motorized Spindles." In Lecture Notes in Production Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-34486-2_18.

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AbstractThis paper investigates the thermal modeling challenges of high-speed motorized spindles up to 40,000 rpm. The thermal expansion and deflection of motorized spindles are critical determinants for the resulting tool center point displacement and the achievable machining accuracy of machine tools. In order to compensate, finite element and reduced physical models (digital twins) therefore require an accurate understanding of the thermal boundary conditions. In motorized spindles, heat sources are of great significance to the resulting temperature field. However, it is very difficult to a
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Nayak, Soumyaranjan, Abhishek Kumar Singh, Hina Gokhale, M. J. N. V. Prasad, and K. Narasimhan. "A Numerical Study to Analyze the Effect of Process Parameters on Ring Rolling of Ti-6Al-4V Alloy by Response Surface Methodology." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-58006-2_25.

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AbstractHot ring rolling is a production method to manufacture seamless rings. It is a complex incremental metal-forming process where reduction of cross-section leads to increase in diameter of the ring via circumferential extrusion. High degree of non-linearity and asymmetry is associated with the process. The process results in non-uniform distribution of temperature and plastic strain in the ring cross-section, and this in turn significantly affects the deformation behavior, microstructure, and mechanical properties. Form defect like fishtail defect is also a major concern and incurs loss
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Zhang, Zhenya, Deyun Lyu, Paolo Arcaini, Lei Ma, Ichiro Hasuo, and Jianjun Zhao. "Effective Hybrid System Falsification Using Monte Carlo Tree Search Guided by QB-Robustness." In Computer Aided Verification. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81685-8_29.

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AbstractHybrid system falsification is an important quality assurance method for cyber-physical systems with the advantage of scalability and feasibility in practice than exhaustive verification. Falsification, given a desired temporal specification, tries to find an input of violation instead of a proof guarantee. The state-of-the-art falsification approaches often employ stochastic hill-climbing optimization that minimizes the degree of satisfaction of the temporal specification, given by its quantitative robust semantics. However, it has been shown that the performance of falsification coul
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Srulijes, J., G. Smeets, G. Patz, and F. Seiler. "Accelerating hydrogen/air mixtures to superdetonative speeds using an expansion tube." In Ram Accelerators. Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-46876-6_29.

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Olsen, Alexander. "Example RCM Analysis of a Low-Speed Diesel Engine." In Safety Culture and Leading Indicators for Safety in the Maritime and Offshore Environment. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-55943-3_58.

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Li, Luo Xing, H. Zhang, J. Hu, J. Zhou, and J. Duszczyk. "Simulation-Based Design of Ram Speed Profile for Isothermal Extrusion." In Advances on Extrusion Technology and Simulation of Light Alloys. Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-467-7.153.

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Hatai, Indranil, and Indrajit Chakrabarti. "A High-Speed Low-Power Low-Latency Pipelined ROM-Less DDFS." In Communications in Computer and Information Science. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17881-8_11.

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Sabater, Marc, M. L. Garcia-Romeu, and J. Ciurana. "Input Parameters Determination for Predicting Ram Speed and Billet Temperature for the First Billet." In Advances on Extrusion Technology and Simulation of Light Alloys. Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-467-7.161.

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Conference papers on the topic "Speed (rpm)"

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Tajar, Abdul, M. Kumar, D. S. D. Rao, and R. Muthu. "Flight Evaluation of Variation in Rotor RPM on Low Speed Handling Characteristics of Helicopter." In Vertical Flight Society 71st Annual Forum & Technology Display. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10173.

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This paper describes multi fold advantages of increasing the Rotor RPM to improve low speed handling of helicopters in high altitude operations, where-in the availability of engine power, control margin and air density ratio play an important role. The primary aim of this work was to reduce the tail rotor collective requirement in hover, sideward flight, spot turns and in take-off and landing at high altitudes. The increase in rotor RPM was also proven beneficial for low speed handling at low altitude with high all up weight. Simulations were carried out for different all up weights and altitu
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Ward, Elizabeth, Inderjit Chopra, and Anubhav Datta. "RPM Driven Extension-Torsion Coupled Self-Twisting Rotor Blades." In Vertical Flight Society 72nd Annual Forum & Technology Display. The Vertical Flight Society, 2016. http://dx.doi.org/10.4050/f-0072-2016-11438.

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This paper describes the effects of a composite coupled blade spar on the performance of a slowed RPM helicopter rotor in high speed edgewise flight. A UH-60A-like rotor blade was chosen as a baseline for this study as it is the only production-level rotor optimized for hover that has been tested at high advance ratios up to 1.0. The analysis was performed using a full 3-D FEA based aeroelastic computational structural dynamics (CSD) solver, X3D. This type of analysis allows for the design of novel rotors and discrete/segmented spanwise variation of structural properties. For this paper the ro
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Hirano, Susumu, Toshiyuki Sunaba, and Takashi Ito. "Evaluation of Corrosion Inhibitor with High Speed Rotating Cage." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-10903.

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Abstract In this study, the effect of turbulence on corrosion inhibitor performance was investigated with a rotating cage autoclave (RCA) in order to select a corrosion inhibitor for a Japanese field piping. The maximum rotating speed is 2,000 rpm, corresponding to 8 m/s in circumferential speed of 80 mm diameter of the cage. The capacity of the autoclave is 2.3 L. The flow pattern was observed through a transparent acrylic resin container. As the rotating speed became higher, a vortex appeared clearly on the free surface of test solution. The bottom of vortex reached the top of the rotating c
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Srivatsa, Shreyas, Syed Shahjahan Ahmad, Samrat Das, Sakshi Narchail, Pramod Kumar, and G. Narayanan. "Experimental Studies on Speed-Dependent Vibrations of a 30,000 rpm Switched Reluctance Machine." In 2024 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES). IEEE, 2024. https://doi.org/10.1109/pedes61459.2024.10961041.

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Ward, Elizabeth, Inderjit Chopra, and Anubhav Datta. "RPM Driven Extension-Torsion Coupled Self-Twisting Rotor Blades." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12062.

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This paper describes the effects of a composite coupled blade spar on the performance of a slowed RPM helicopter rotor in high speed edgewise flight. This study expands upon previous work that showed that antisymmetric composite coupling in the spar of a UH-60A-like rotor can provide a significant increase in the lift to drag ratio of a rotor when the RPM is reduced. The current analysis was performed using a full 3-D FEA based aeroelastic computational structural dynamics (CSD) solver, X3D, now with the inclusion of a freewake aerodynamics model. This was validated using existing UH-60A test
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Feng, Lei, Vishal Panchal, Richard Thorogate, James Robinson, and Andrew Humphris. "Rapid Probe Microscope (RPM) Technology Advances High-Speed AFM Systems for Next-Generation Semiconductor Metrology." In 2025 36th Annual SEMI Advanced Semiconductor Manufacturing Conference (ASMC). IEEE, 2025. https://doi.org/10.1109/asmc64512.2025.11010280.

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Krantz, Timothy, Robert Handschuh, and Gary Roberts. "Results of NASA Technical Challenge to Demonstrate Two-Speed Drive for Vertical Lift Vehicle." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12852.

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Currently, manned vertical lift vehicles are flown in a manner such that the rotors operate over a narrow range of rotating speed regardless if the vehicle's flight condition is one of vertical takeoff and landing, hover, or forward cruise. The propulsion systems are optimized for operation at the same, corresponding narrow range of rotor speed. However, certain missions and markets benefit greatly if the rotor speed can be adjusted over a wide range of speed to match demands of different missions and flight regimes. A vehicle that can operate with a wide range of rotor speeds would address ke
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Ismagilov, F. R., V. E. Vavilov, and D. V. Gusakov. "High-Speed Electric Machine with a Speed of 1.2 million rpm." In 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM). IEEE, 2018. http://dx.doi.org/10.1109/speedam.2018.8445266.

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Jahanmir, Said. "Ultrahigh Speed Micromachining." In ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34174.

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A new ultrahigh speed micro-spindle has been developed for micromachining that can be used at rotational speeds as high as 500,000 rpm. Since conventional ball bearings or fluid lubricated journal bearings cannot be used at speeds beyond 300,000 rpm for any extended period of time, the new spindle uses a set of journal and thrust foil bearings. The micro-spindle was integrated with a 3-axis micro-milling machine. Cutting experiments were performed on an aluminum alloy at speeds greater than 300,000 rpm using 50 and 300 micron end-mills. The increase in rotational speed to 450,000 rpm in micro-
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Kilicarslan, Ali, and Mohamad S. Qatu. "Performance Investigation of an Eight Cylinder Gasoline Engine." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-40417.

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Performance investigation of a Chevrolet 5.7, eight cylinder gasoline engine is experimentally carried out at laboratuary conditions by means of the special softwares called “NetDyn” and “WinDyn”. This experimental work is intended to make contribution to the researchers that experimentally analyze the parameters of gasoline engines with the engine speed in detail. During the experiments, the engine speed is changed from 2500 rpm to 5250 rpm with 250 rpm intervals and steptime for succesive speeds is kept constant as 10 s. Engine power, engine torque, fuel and air flowrates per kW, mechanical
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Reports on the topic "Speed (rpm)"

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Khan, Asad, Angeli Jayme, Imad Al-Qadi, and Gregary Renshaw. Embedded Energy Harvesting Modules in Flexible Pavements. Illinois Center for Transportation, 2024. http://dx.doi.org/10.36501/0197-9191/24-008.

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Energy from pavements can be harvested in multiple ways to produce clean energy. One of the techniques is electromagnetic energy harvesting, in which mechanical energy from vehicles is captured in the form of input displacement to produce electricity. In this study, a rack-and-pinion electromagnetic energy harvester proposed in the literature as a speed bump is optimized for highway-speed vehicles. A displacement transfer plate is also proposed, with a minimum depth of embedment in the pavement to carry input displacements from passing vehicles and excite the energy harvester. The energy harve
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Severance, C., T. J. Rosenau, and S. Pramanik. A High-Speed KDL-RAM File System for Parallel Computers. Defense Technical Information Center, 1990. http://dx.doi.org/10.21236/ada223299.

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Son, Sophie, Amanda Rapoza, and Kelsey White. Natchez Trace Parkway: Raised profile striping modeling report 2025. National Park Service, 2025. https://doi.org/10.36967/2309772.

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Raised profile striping (RPS) was installed on the roadway center and edge lines along a 40-mile corridor of Natchez Trace Parkway (NATR) as a safety measure to reduce traffic accidents. To measure potential effects to the acoustic environment, controlled noise measurements were conducted within NATR in May 2023. Uncontrolled measurements were taken in 2024 once the roads reopened to provide background acoustic data for the analysis. These data were used to conduct noise modeling scenarios analyzing the effect of RPS on the acoustic environment. Modeled results indicate that vehicles running o
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Meyers, C., F. Streitz, Y. Yao, S. Smith, and A. Lamont. Using Supercomputers to Speed Execution of the CAISO/PLEXOS 33% RPS Study. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1035960.

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Roa, Julia, and Joseph Oldham. Feasibility Study of Regional Air Mobility Services for High Priority Transportation in the San Joaquin Valley. Mineta Transportation Institute, 2022. http://dx.doi.org/10.31979/mti.2022.2129.

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Regional Air Mobility (RAM) focuses on building upon existing airport infrastructure to transport people and goods using innovative aircraft that offer a huge improvement in efficiency, affordability, and community-friendly integration over existing regional transportation options. These aircraft, which typically carry less than 20 passengers or an equivalent weight in cargo, are flexible in terms of where they can take off and land, even using existing runways and infrastructure to maximize compatibility with today’s airports. This project examines the feasibility of RAM supporting high-speed
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Roa, Julio, Joseph Oldham, and Marina Lima. Recognizing the Potential to Reduce GHG Emissions Through Air Transportation Electrification. Mineta Transportation Institute, 2023. http://dx.doi.org/10.31979/mti.2023.2223.

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California is aggressively moving forward with efforts to deploy zero-emission transportation technology to fight climate change, especially the Greenhouse Gas (GHG) emissions from the high-impact transportation sector. However, to date, the investments California has made with Cap-and-Trade funding have focused on ground transportation and some marine sources and not the aircraft at the over 140 airports in the state. Through a California-focused comprehensive GHG emissions analysis, this research project seeks to determine how RAM using electric/hybrid electric aircraft can provide new high-
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Thor, Peter, Karin Olsson, Håkan Wennhage, et al. Marina miljön i 8+fjordar – nuvarande kunskap om ekosystemet och de mänskliga belastningarna. Department of Aquatic Resources, Swedish University of Agricultural Sciences, 2023. http://dx.doi.org/10.54612/a.utn1p1g09m.

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8+fjordar-området är topografiskt väldigt varierande. Vattenutbytet är långsamt och tillförseln av näringsämnen stor. Största delen av näringsämnen stannar kvar i fjordarna. Mest i Havstens- och Hakefjordar där 40-50 % av den lokala näringstillförseln stannar kvar. Utsläppen från jordbruk och skogsbruk är stora i 8+fjordar-området. T.ex. står dessa för 62 % av kvävetillförseln och 69 % av fosfortillförseln till Byfjorden. Men utsläpp från punktkällor direkt till havet är också betydande (21 % av kvävetillförseln och 19 % av fosfortillförseln till Byfjorden). Man har genom en mängd olika tillta
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