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Journal articles on the topic 'Rotational speed measurement'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Wang, Tao, Bicong Wang, Yuyi Chen, and Yufeng Luo. "A Rotation-Speed Measurement System Based on Magneto-Inductive Effect." Sensor Letters 18, no. 4 (2020): 299–303. http://dx.doi.org/10.1166/sl.2020.4219.

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There are few reports on high rotational speed measurement of brushless direct current (DC) motors based on giant magneto-inductive effect. In this study, a rotational speed measurement system based on giant magneto-inductive effect is established for measuring the rotational speeds of DC motors. Successive sawtooth waves are found when rotating shaft is close to the GMI sensor. Through using the magneto-inductive sensing system, different high rotational speeds (1500∼24000 r/min) of the motor are accurately measured. Therefore, this giant magneto-inductive sensor may be used for high rotation

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2

Li, Lin, Hongli Hu, Yong Qin, and Kaihao Tang. "Digital Approach to Rotational Speed Measurement Using an Electrostatic Sensor." Sensors 19, no. 11 (2019): 2540. http://dx.doi.org/10.3390/s19112540.

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In industrial production processes, rotational speed is a key parameter for equipment condition monitoring and fault diagnosis. To achieve rotational speed measurement of rotational equipment under a condition of high temperature and heavy dust, this article proposes a digital approach using an electrostatic sensor. The proposed method utilizes a strip of a predetermined material stuck on the rotational shaft which will accumulate a charge because of the relative motion with the air. Then an electrostatic sensor mounted near the strip is employed to obtain the fluctuating signal related to the

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3

Liu, Yang, Jigou Liu, and Ralph Kennel. "Rotational speed measurement using self-mixing interferometry." Applied Optics 60, no. 17 (2021): 5074. http://dx.doi.org/10.1364/ao.420376.

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4

Harun, Suryadiwansa, Toshiro Shibasaka, and Toshimichi Moriwaki. "Cutting Temperature Measurement in Turning with Actively Driven Rotary Tool." Key Engineering Materials 389-390 (September 2008): 138–43. http://dx.doi.org/10.4028/www.scientific.net/kem.389-390.138.

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In this paper, turning with actively driven rotary tool was investigated. The influence of machining conditions such as tool rotational speed and inclination angle on the cutting edge temperature is examined experimentally. The temperature was measured by a thermocouple of constantan wire and work material. Experimental results show that the cutting temperature decreases with increasing tool rotational speed to a minimum value at a certain tool rotational speed and then increase. Next, the minimum temperature recorded by tool rotation was approximately 150oC lower than that the cutting with a

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5

Lu, Feng, Hong Bo Shen, Xiao Fei Zhang, Li Xiu Zhang, Yu Hou Wu, and Ke Zhang. "Analysis of Spindle Rotary Precision Based on Two-Point Methods." Applied Mechanics and Materials 624 (August 2014): 327–31. http://dx.doi.org/10.4028/www.scientific.net/amm.624.327.

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Two-point method designed of the test system for application, the precision of the motorized spindle rotation was dynamic measurements. The system consists of standard bars, high-precision non-contact eddy current sensor. Analyzed by a mathematical model to establish error separation, measurement of two spindle rotation accuracy. The use of two isolated error method for processing the experimental data obtained spindle rotation accuracy at different speeds. Studies have shown that when the spindle speed of 10,000 rpm rotational error is small and tends to be more stable. Identify the factors t

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6

Wasilewski, Jacek, Joanna Szyszlak-Bargłowicz, Grzegorz Zając, and Małgorzata Szczepanik. "Assessment of Co2 Emission by Tractor Engine at Varied Control Settings of Fuel Unit." Agricultural Engineering 24, no. 4 (2020): 105–15. http://dx.doi.org/10.1515/agriceng-2020-0040.

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Abstract The paper presents results of experimental studies concerning CO2 emission of S-4003 diesel engine Ursus C-360 at a variable fuel injection advance angle and opening pressure of injectors. Measurements were made on the dynamometric stand on the test bench. The engine operated according to the load characteristic at two characteristic rotational speeds i.e., at the maximum torque velocity (1600 rpm) and at the rated speed (2200 rpm). In each measurement point of load characteristics, CO2 concentration was measured in exhaust gases with the use of exhaust gases analyser M-488 Multigas P

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7

Lus, Tomasz, Marek Łutowicz, and Dominika Cuper. "APPLICABILITY STUDY OF THE FIBER-OPTIC GYRO IN PISTON ENGINES DIAGNOSING PROCESS." Agricultural Engineering 46, no. 1 (2014): 40–50. http://dx.doi.org/10.15544/ageng.2014.004.

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The Polish Naval Academy has been involved in marine reciprocating combustion engines indication tests for many years. Results of researches aiming to diagnostic using of measurement of engine crankshaft unsteady angular speed are presented in the paper. Up to now, adequate accuracy of angular speed measurement had not been achieved to make proper diagnostic decision. Commercially, measurement of unsteady rotation speed has been used only in MAPEX –TV system (Torsional Vibration detector) dedicated to SULZER engines, which can detect only the one engine cylinder switch out of work without any

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8

Novotná, P., A. Landfeld, K. Kýhos, M. Houška, and J. Strohalm. "Use of helical ribbon mixer for measurement of rheological properties of fruit pulps." Czech Journal of Food Sciences 19, No. 4 (2013): 148–53. http://dx.doi.org/10.17221/6599-cjfs.

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Fruit pulps contain fine particles of the flesh of the original fruit that are suspended in the fruit juice. This suspension has a tendency to settling or separation during measurements of its rheological properties in the rotational rheometer with coaxial cylinders (especially if the greater gap is used). In this case the use of a mixer is convenient. The mixer can serve as a tool for measurement of rheological properties and at the same time it can prevent the settling and it is not sensitive to the occurrence of greater particles in the measured fluid. The helical ribbon mixer was used in t

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9

Natili, Francesco, Francesco Castellani, Davide Astolfi, and Matteo Becchetti. "Video-Tachometer Methodology for Wind Turbine Rotor Speed Measurement." Sensors 20, no. 24 (2020): 7314. http://dx.doi.org/10.3390/s20247314.

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The measurement of the rotational speed of rotating machinery is typically performed based on mechanical adherence; for example, in encoders. Nevertheless, it can be of interest in various types of applications to develop contactless vision-based methodologies to measure the speed of rotating machinery. In particular, contactless rotor speed measurement methods have several potential applications for wind turbine technology, in the context of non-intrusive condition monitoring approaches. The present study is devoted exactly to this problem: a ground level video-tachometer measurement techniqu

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10

Yu, Gui Yin, and Lu Zhang. "Design of New Automobile Rotational Speed Measuring Device." Advanced Materials Research 383-390 (November 2011): 325–28. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.325.

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The automobile rotational speed measurement device, consisting of information collecting and processing, phase-locked loops, wave shaping, frequency division and display, can be applied for measurement of the rotational speed of automobiles with various cylinders.

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11

Todorovic, Andreja, and Miroljub Jevtic. "Rotational speed measurement using induction coil sensor inserted in the magnetic field of the rotational permanent magnet." Facta universitatis - series: Electronics and Energetics 23, no. 2 (2010): 199–206. http://dx.doi.org/10.2298/fuee1002199t.

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In this paper the application of induction coil sensor, inserted into a mechanical rotational magnetic field of the rotational permanent magnet for the rotational speed measurements has been proposed and described. The sensor is simple, low-cost, and applicable for machine shafts speed measurements (spatially available and unavailable). On the shaft, whose rotational speed is measured, the rotational permanent magnet is fixed. From measured frequency value of induced voltage in the coil sensor the rotational speed value is given using PC with adequate software, interface for the analogue signa

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12

Ma, Zi Qin, Ren Zhang, Da Li Kang, and Wu Yang. "A Research of High Precision Rotational Speed Measurement System Based on Infrared Sensor and Microcontroller." Applied Mechanics and Materials 278-280 (January 2013): 680–83. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.680.

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With the deep analysis on the rotational speed measurement and the error existed in the measurement process at present, this paper introduces a high precision rotational speed measurement system based on infrared sensor and microcontroller. This system combines with improved measuring method. The sensor is an infrared photoelectric sensor, and uses its characteristics of the autocollimator ensured accuracy of measurement. The photoelectric sensor outputs weak voltage pulse signal when it receives the reflected infrared light. And then the signal is processed by double-reversed amplification an

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13

Li, Yu-Hua, Haiqi Zheng, N. B. Jones, and M. J. Pont. "Multi-Channel Rotational Speed Measurement: A Software Based Approach." Measurement and Control 31, no. 8 (1998): 229–31. http://dx.doi.org/10.1177/002029409803100801.

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14

Chen, Guo Bin, Xiao Ming Zhang, Xing Cui, Yong Hui Li, and Jun Liu. "The High-Precision Relative Rotational Speed Measurement System Based on Magnetic Signal and Spectrum Correction." Advanced Materials Research 291-294 (July 2011): 2713–17. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2713.

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A kind of relative rotational speed measurement system based on magnetic signal and spectrum correction should be proposed for the most of current methods of relative rotational speed measurement cannot meet the measurement requirement of small size, high overload resistance in the military and industrial fields. The system collects the fixed length of time asymmetric periodic intensity signal of magnetic induction based on the characteristics of magnetoresistive sensor’s non-contact measurement, and then analyze the signal spectrum by FFT in order to obtain the accurate main frequency compone

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15

Wang, Dong, Siwei Chen, Xuanpeng Li, Weigong Zhang, and Haolong Jin. "Research on Rotational Angle Measurement for the Smart Wheel Force Sensor." Sensors 20, no. 4 (2020): 1037. http://dx.doi.org/10.3390/s20041037.

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The measurement of the rotational angle of the wheel is critical for the smart wheel force sensor (SWFS) to obtain the wheel forces defined in the vehicle coordinates. To simplify the structure of the SWFS and overcome the shortcomings of the traditional angular transducer, a new method to evaluate the rotational speed of the wheel and then calculate the rotational angle is proposed in this paper. In this method, the centripetal acceleration caused by the rotation is recorded by three accelerometers and used carefully. What’s more, the possible sources of error are classified and analyzed. Sim

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16

Bing, Meng, Fang Xiu Jia, and Wen Jin Yao. "The Rotational Speed Measurement of Brushless DC Motor Based on STM32 Microcontroller." Advanced Materials Research 760-762 (September 2013): 891–95. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.891.

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The brushless DC motor applied on the electric steering gear of trajectory correction projectiles often requires getting real-time rotational speed value. The hall sensors output the hall signals for measurement, after the integration by the D-type flip-flop, an ideal pulse can be produced. Afterwards STM32F103ZE microcontroller is used to calculate the rotational speed value of the motor by the Improved M/T method. The resolution and precision can be analyzed after getting the result. This rotational speed measurement system has high precision and good real-time characteristics. It is signifi

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17

Sun, Hui, Ji-Gou Liu, Quan Zhang, and Ralph Kennel. "Self-mixing interferometry for rotational speed measurement of servo drives." Applied Optics 55, no. 2 (2016): 236. http://dx.doi.org/10.1364/ao.55.000236.

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18

Wang, Lijuan, Yong Yan, Yonghui Hu, and Xiangchen Qian. "Rotational Speed Measurement Through Electrostatic Sensing and Correlation Signal Processing." IEEE Transactions on Instrumentation and Measurement 63, no. 5 (2014): 1190–99. http://dx.doi.org/10.1109/tim.2013.2292283.

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19

Wang, Tianyu, Yong Yan, Lijuan Wang, and Yonghui Hu. "Rotational Speed Measurement Through Image Similarity Evaluation and Spectral Analysis." IEEE Access 6 (2018): 46718–30. http://dx.doi.org/10.1109/access.2018.2866479.

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20

Chen, Qingguang, Lingyun Xue, and Huanle Rao. "Rotational speed measurement of ring spinning based on magnetic sensor." Measurement Science and Technology 28, no. 11 (2017): 115106. http://dx.doi.org/10.1088/1361-6501/aa874e.

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21

Liu, Youyong, He Wen, Zongying Ding, Lei Xu, Hongjiang Chen, and Janusz Smulko. "An Instantaneous Engine Speed Estimation Method Using Multiple Matching Synchrosqueezing Transform." Journal of Sensors 2021 (April 8, 2021): 1–11. http://dx.doi.org/10.1155/2021/6650432.

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Instantaneous rotational speed measurement of the engine is crucial in routine inspection and maintenance of an automobile engine. Since the contact measurement of rotational speed is not always available, the vibration measurement has been used for noncontact rotational speed estimation methods. Unfortunately, the accuracy of the noncontact estimation methods by analyzing engine vibration frequency is not satisfactory due to the influence of noise and the strong nonstationary characteristic of the vibration signal. To overcome these problems, based on the multiple matching synchrosqueezing tr

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22

Zbrowski, Andrzej, and Wojciech Jóźwik. "Determination of the Speed of an Unmanned Rescue Vehicle." Solid State Phenomena 220-221 (January 2015): 940–45. http://dx.doi.org/10.4028/www.scientific.net/ssp.220-221.940.

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The article presents the process of determining the speed of an unmanned rescue vehicle.The conducted investigations involved a measurement system developed for testing dynamic lorries. The application of a test system for low-speed all-terrain vehicles was possible due to a wide measurement range of sensors. Speed was tested employing two following methods:an indirect method consisting of the measurement of the instantaneous rotational speed of the wheel;a direct method consisting of the measurement of speed against the ground, taken with an optical speed sensor.The authors also describe the

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23

Chen, Yong, He Zhang, Qi Jiang, and De Zhang Shen. "Independent Velocity Measurement of Small Underwater High-Speed Moving Body Based on External Turbine." Applied Mechanics and Materials 300-301 (February 2013): 967–73. http://dx.doi.org/10.4028/www.scientific.net/amm.300-301.967.

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Combining with rotational speed measurement methods and underwater environment particularity, an independent velocity measurement scheme applicable to small underwater high-speed moving body was proposed in this paper. The structural design of the measurement device was designed and signal process method was improved, and the relationship between turbine rotational speed and speed of the body was obtained by FLUNET dynamics simulation and water tunnel experiments. Finally, the simulation and experimental results were analyzed. The results show that this method is effective and feasible within

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24

Węglowski, Marek Stanislaw. "An Experimental Study on the Friction Stir Processing Process of Aluminium Alloy." Key Engineering Materials 554-557 (June 2013): 1787–92. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1787.

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The effect of rotational and travelling speeds and down force on the torque in Friction Stir Processing (FSP) process are presented. To find a dependence combining the spindle torque acting on the tool with the rotational speed, travelling speed and the down force, the artificial neural networks have been applied. Studies have shown that the increase in the rotational speed causes decrease in the torque while the increase in the travelling speed and down force causes the increase in the torque at the same time. The relationship between parameters of the process and the temperature of the tool,

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25

Andrych-Zalewska, Monika, Radosław Włostowski, and Radosław Wróbel. "Methods of measuring crankshaft speed in mechatronics." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 9 (2018): 105–7. http://dx.doi.org/10.24136/atest.2018.294.

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The article discusses methods of measuring rotational speed. Classical methods as well as a new method using vibration measurement as the input function in the process of obtaining the result of the crankshaft rotational speed were presented. A classic diagnostic path, as well as digital signal processing, is required to obtain the correct diagnostic INFORMATION. The work also includes information on the CAN bus as well as the EOBD system.

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26

Kondo, Kazuki, and Shin-Ichi Tooe. "Measurement of the Tangential Grinding Force Using the Slip of an Induction Motor—Construction of the Measurement System." Advanced Materials Research 76-78 (June 2009): 107–12. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.107.

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A new system for measuring a tangential grinding force using the slip of the rotational speed of an induction motor was developed. The motor slip is measured as the change in the rotational period for the induction motor. The system operates LabVIEW software on a personal computer, and a rotary encoder is connected with the motor spindle, which drives the axis of a grinding wheel. A signal of one pulse per rotation from the rotary encoder is input to the interface of the computer to measure the rotational period. LabVIEW has the flexibility of a programming language and operates within a graph

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27

Ding, Chang Hong, Hong Zuo Li, Ji Hang Cheng, and Shuang Xu. "Studies of Large-Range Dynamic and Static Motor Torque Tester." Advanced Materials Research 516-517 (May 2012): 1636–42. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1636.

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This paper discusses the composition, structural features, working principle, and technical performance of a kind of motor torque measurement system. This system adopts two kinds of torque measurement methods, dynamic torque measurement method and static torque measurement method, uses microprocessor to collect data including rotational speed of load motor and torque signals of to-be-tested motor, figures out the rotational speed and torque through software algorithm, as well as displays and output them. This system also makes actual measurement of a type of motor. The measurement period is sh

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28

Liu, Zhi-xiang, Cong Xu, Meng Li, Qi Wang, and Heng Liu. "Study on the rotational speed of bearing cage based on ultrasonic measurement." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 231, no. 4 (2017): 684–89. http://dx.doi.org/10.1177/1464419317697855.

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In this paper, a new method for measuring the cage speed based on the ultrasonic reflection principle is proposed. By emitting high-frequency ultrasound signal for penetrating the bearing outer ring and detecting its ultrasonic echo signal continuously, the time of each rollers passing under the probe can be recorded accurately by detecting the change in the ultrasonic echo signal. Then, the rotation speed of the roller can be obtained by counting the passing frequency of the rollers. For the cages under working conditions, the cages and the rollers share the same rotation speed, where the cag

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29

Kuang, Xing Hong, Zhe Yi Yao, Zhe Yi Yao, and Shi Ming Wang. "Design of Rotational Speed Measurement System Based on the Hall Sensor." Applied Mechanics and Materials 427-429 (September 2013): 596–99. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.596.

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This paper introduces a design of a STC89C52 microcontroller as the main controller, the motor speed is measured by the Hall sensor. This design uses integrated Hall sensor, which has a frequency response, high precision and anti-interference ability. This article describes the working principle of the method and method of use of the Hall sensor measurement speed

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30

Wang, Lijuan, Yong Yan, and Kamel Reda. "Comparison of single and double electrostatic sensors for rotational speed measurement." Sensors and Actuators A: Physical 266 (October 2017): 46–55. http://dx.doi.org/10.1016/j.sna.2017.09.014.

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31

Hancke, G. P., and C. F. T. Viljoen. "The microprocessor measurement of low values of rotational speed and acceleration." IEEE Transactions on Instrumentation and Measurement 39, no. 6 (1990): 1014–17. http://dx.doi.org/10.1109/19.65817.

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32

Choi, Eun-hye. "A Study on Vibration Measurement based on the Rotational Speed Sensor." Transactions of The Korean Institute of Electrical Engineers 68, no. 6 (2019): 755–60. http://dx.doi.org/10.5370/kiee.2019.68.6.755.

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33

Wang, Tianyu, Yong Yan, Lijuan Wang, Yonghui Hu, and Shuai Zhang. "Instantaneous Rotational Speed Measurement Using Image Correlation and Periodicity Determination Algorithms." IEEE Transactions on Instrumentation and Measurement 69, no. 6 (2020): 2924–37. http://dx.doi.org/10.1109/tim.2019.2932154.

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34

Zhang, Wei Guang, Xin Ye Lei, Fen Fen Zhang, and Qi Li. "On-Machine Inspection Method for Superduty Lathe Based on Improved Laser Triangulation." Applied Mechanics and Materials 65 (June 2011): 354–57. http://dx.doi.org/10.4028/www.scientific.net/amm.65.354.

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In the development and application of superduty lathe process, the size measurement of a large workpiece is a key issue of quality control because the cutting process of large workpiece is high linear speed and time-consuming . A novel surface position information acquisition method for rotational object is proposed. The method uses high speed linear CCD to acquire image sequences, adopts image restoration technique to resolve clear images of laser spot from the image sequences, identifies sub-pixel center point of laser spot with correlation information among the clear frame-to-frame images,

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35

Chen, J. X., X. Gan, and J. M. Owen. "Heat Transfer From Air-Cooled Contrarotating Disks." Journal of Turbomachinery 119, no. 1 (1997): 61–67. http://dx.doi.org/10.1115/1.2841011.

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A superposed radial outflow of air is used to cool two disks that are rotating at equal and opposite speeds at rotational Reynolds numbers up to 1.2 × 106. One disk, which is heated up to 100°C, is instrumented with thermocouples and fluxmeters; the other disk, which is unheated, is made from transparent polycarbonate to allow the measurement of velocity using an LDA system. Measured Nusselt numbers and velocities are compared with computations made using an axisymmetric elliptic solver with a low-Reynolds-number k–ε turbulence model. Over the range of flow rates and rotational speeds tested,

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36

Lu, Yan, and Qing Li. "A regression model for prediction of idler rotational resistance on belt conveyor." Measurement and Control 52, no. 5-6 (2019): 441–48. http://dx.doi.org/10.1177/0020294019840723.

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This paper presents a regression model for prediction of idler rotational resistance on belt conveyor. The advantage of the regression model is that it is created according to the real experimental measurement. Besides, the predicted model corresponds with real operational parameters, such as radial force, rotational speed and measurements, conducted via using a laboratory test facility; several criteria have been used to verify the presented regression model. Finally, by analyzing the regression model combined with influence of radical force and rotational resistance on idler rotational resis

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37

Dereszewski, Mirosław, and Grzegorz Sikora. "Diagnostics of the Internal Combustion Engines Operation by Measurement of Crankshaft Instantaneous Angular Speed." Journal of KONBiN 49, no. 4 (2019): 281–95. http://dx.doi.org/10.2478/jok-2019-0087.

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Abstract Diagnostics based on measuring of crankshaft instantaneous rotational speed allows precise location of damage to the injection system and detection of external disturbances. Active measurement of instantaneous rotational speed requires use of equipment with high sensitivity, permanent assembly at the ends of the crankshaft and the analysis of a very large amount of data. Presented method can be used for measurement of torsional vibration of crankshaft, indirectly through simultaneous measurement of the width of the pulses generated by the encoder disks. Momentary, relative displacemen

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38

Demir, Ugur, Pelin Süle, and Mustafa Caner Aküner. "Investigation on the Output Signal of Rotational Speed Sensor for Different Flux Surfaces between Gear Wheel and Sensor." Applied Mechanics and Materials 850 (August 2016): 172–78. http://dx.doi.org/10.4028/www.scientific.net/amm.850.172.

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Rotational Speed Sensors are typically used to measure rotational speed in automotive application such as ABS (Anti-lock Braking System), ASR (Anti Slip Regulation) or Gear Box. In terms of application area, rotational speed sensors transmit very important signal from gear wheel to ECU (Electronic Control Units). The output signal of rotational speed sensor (RSS) may not provide exact solution in high speed situation because RSS is a kind of inductive sensor which has discharge and charge time. Thus, response time of RSS may lead a problem for exact speed measurement while the output signal is

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39

Čeperković, Vladimir, and Vujo Drndarević. "A method for selfcalibration of a magneto-resistive angular position sensor in servo systems." Tehnika 75, no. 4 (2020): 469–76. http://dx.doi.org/10.5937/tehnika2004469c.

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Magneto-resistive and Hall angular position sensors are frequently used in servo systems, due to their reliability, longevity, and tolerance to environmental conditions. In this paper, a measurement error compensation is integrated into the servo system control structure. The compensation consists of two steps: a linear compensation of the magnetic field vector measurement error, and harmonic compensation of the angular position measurement error. The selfcalibration method uses data collected during rotation with maximal speed to identify parameters of the measurement process model. Identific

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40

Lyu, Yanlin, Muhammad Jamil, Ning He, Munish Kumar Gupta, and Danil Yurievich Pimenov. "Development and Testing of a High-Frequency Dynamometer for High-Speed Milling Process." Machines 9, no. 1 (2021): 11. http://dx.doi.org/10.3390/machines9010011.

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Cutting forces are strongly associated with the mechanics of the cutting process. Hence, machining forces measurements are very important to investigate the machining process, and numerous methods of cutting forces measurements have been applied. Nowadays, a dynamometer is the most popular tool for cutting forces measurements. However, the natural frequency of a dynamometer has a direct impact on the accuracy of measured cutting forces in the machining process. Therefore, few dynamometers are appropriate and reliable to measure the cutting forces at high frequencies. In this work, a new strain

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41

Hong, Liu, Yongzhi Qu, Jaspreet Singh Dhupia, Shuangwen Sheng, Yuegang Tan, and Zude Zhou. "A novel vibration-based fault diagnostic algorithm for gearboxes under speed fluctuations without rotational speed measurement." Mechanical Systems and Signal Processing 94 (September 2017): 14–32. http://dx.doi.org/10.1016/j.ymssp.2017.02.024.

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42

Zhong, Jianfeng, Shuncong Zhong, Qiukun Zhang, and Zhike Peng. "Measurement of instantaneous rotational speed using double-sine-varying-density fringe pattern." Mechanical Systems and Signal Processing 103 (March 2018): 117–30. http://dx.doi.org/10.1016/j.ymssp.2017.10.011.

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43

Wang, L., Y. Yan, and K. Reda. "Enhancing the performance of a rotational speed measurement system through data fusion." Journal of Physics: Conference Series 1065 (August 2018): 072024. http://dx.doi.org/10.1088/1742-6596/1065/7/072024.

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44

Wang, Lijuan, and Yong Yan. "Mathematical modelling and experimental validation of electrostatic sensors for rotational speed measurement." Measurement Science and Technology 25, no. 11 (2014): 115101. http://dx.doi.org/10.1088/0957-0233/25/11/115101.

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45

Lüddecke, Bernhardt, Dietmar Filsinger, and Jan Ehrhard. "On Mixed Flow Turbines for Automotive Turbocharger Applications." International Journal of Rotating Machinery 2012 (2012): 1–14. http://dx.doi.org/10.1155/2012/589720.

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Due to increased demands for improved fuel economy of passenger cars, low-end and part-load performance is of key importance for the design of automotive turbocharger turbines. In an automotive drive cycle, a turbine which can extract more energy at high pressure ratios and lower rotational speeds is desirable. In the literature it is typically found that radial turbines provide peak efficiency at speed ratios of 0.7, but at high pressure ratios and low rotational speeds the blade speed ratio will be low and the rotor will experience high values of positive incidence at the inlet. Based on fun

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Farhang, Majid, Omid Sam-Daliri, Mohammadreza Farahani, and Azadeh Vatani. "Effect of friction stir welding parameters on the residual stress distribution of Al-2024-T6 alloy." Journal of Mechanical Engineering and Sciences 15, no. 1 (2021): 7684–94. http://dx.doi.org/10.15282/jmes.15.1.2021.06.0606.

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The objective of this study was to investigate the influences of the main parameters of friction stir welding (FSW) on the residual stresses remained in the FSW of Al 2024-T6. The main parameters were tool rotational speed and tool transverse speed. The effect of these parameters on the residual stresses was studied in both finite element simulation and hole drilling strain gauge measurement. The results showed a good agreement between the numerical results and the experimental outcomes. The change in transverse speed from 25 to 31.5 mm/min resulted in increase of longitudinal residual stresse

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Wakui, Tetsuya, and Ryohei Yokoyama. "A Suitable Load Control Method for Constant Tip Speed Ratio Operation of Stand-Alone Wind Turbine-Generator Systems." Wind Engineering 32, no. 2 (2008): 143–61. http://dx.doi.org/10.1260/030952408784815853.

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A suitable load control method for constant tip speed ratio operation of a stand-alone system using a vertical axis wind turbine with self-starting capability is discussed. The system with a straight-wing-type turbine is mainly operated at a constant tip speed ratio. Two types of load control methods are considered: Method-1, where the load torque is controlled in proportion to the square of the rotational speed, and Method-2, which adopts feedback control of the rotational speed in response to the measured wind speed. In this second report on a suitable load control method, the influence of t

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TAO, R., and Y. C. LAN. "INTERACTIONS BETWEEN TWO ROTATING POLARIZED SPHERES." International Journal of Modern Physics B 19, no. 07n09 (2005): 1215–21. http://dx.doi.org/10.1142/s0217979205030098.

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Precise measurement of the attracting force between two spheres inside an electric field indicates that the rotation of one sphere along the axis perpendicular to the electric field reduces the attracting force between them. This reduction becomes smaller as the distance between the two spheres increases. In the limit of infinite rotational speed, the attracting force seems to tend to a non-zero constant.

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Wang, Ji Chang, and Huan Huan Quan. "Applied Mechanics and Applied Technology in Fuel Injection Pump Bench Rotational Speed Measurement System Design Based on CPLD." Advanced Materials Research 910 (March 2014): 316–19. http://dx.doi.org/10.4028/www.scientific.net/amr.910.316.

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In the article, proposing one kind of design plan about rotational speed measurement system design based CPLD. Various modules design has completed according to EDA tools and VHDL hardware description language. The feasibility of the speed measurement system design was verified based on the experiment. At present, the system has been successfully application in the fuel injection pump test-bed.

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Ji-wang, Zhang, Zhang Lai-bin, Ding Ke-Qin, and Duan Li-xiang. "Blade Tip-timing Technology with Multiple Reference Phases for Online Monitoring of High-speed Blades under Variable-speed Operation." Measurement Science Review 18, no. 6 (2018): 243–50. http://dx.doi.org/10.1515/msr-2018-0033.

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Abstract High-speed blades form core mechanical components in turbomachines. Research concerning online monitoring of operating states of such blades has drawn increased attention in recent years. To this end, various methods have been devised, of which, the blade tip-timing (BTT) technique is considered the most promising. However, the traditional BTT method is only suitable for constant-speed operations. But in practice, the rotational speed of turbomachine blades is constantly changing under the influence of external factors, which lead to unacceptable errors in measurement. To tackle this

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