Relevant bibliographies by topics / Absolute angular position

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Absolute angular position'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Absolute angular position"

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Lemarquand, V., and G. Lemarquand. "Inductive absolute angular position sensor." IEEE Transactions on Magnetics 28, no. 5 (September 1992): 2199–201. http://dx.doi.org/10.1109/20.179442.

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de Jong, Gerben W., Gerard C. M. Meijer, Koert van der Lingen, Jo W. Spronck, Arthur M. M. Aalsma, and Dorus (Th ). A. J. M. Bertels. "A smart capacitive absolute angular-position sensor." Sensors and Actuators A: Physical 41, no. 1-3 (April 1994): 212–16. http://dx.doi.org/10.1016/0924-4247(94)80113-4.

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Zhang, Zijian, Fenglei Ni, Yangyang Dong, Minghe Jin, and Hong Liu. "A novel absolute angular position sensor based on electromagnetism." Sensors and Actuators A: Physical 194 (May 2013): 196–203. http://dx.doi.org/10.1016/j.sna.2013.01.040.

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Kul’chin, Yu N., O. B. Vitrik, and A. V. Dyshlyuk. "Adaptive fiber-optic absolute angular position transducer optophysical measurements." Measurement Techniques 49, no. 4 (April 2006): 372–77. http://dx.doi.org/10.1007/s11018-006-0116-6.

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Zhang, Fan, Hengjun Zhu, Kan Bian, Pengcheng Liu, and Jianhui Zhang. "Absolute Position Coding Method for Angular Sensor—Single-Track Gray Codes." Sensors 18, no. 8 (August 19, 2018): 2728. http://dx.doi.org/10.3390/s18082728.

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Single-track Gray codes (STGCs) is a type of absolute position coding method for novel angular sensors, because it has single-track property over traditional Gray codes and mono-difference over linear feedback shift register codes. However, given that the coding theory of STGCs is incomplete, STGC construction is still a challenging task even though it has been defined for more than 20 years. Published coding theories and results on STGCs are about two types of STGC, namely, necklace and self-dual necklace ordering, which are collectively called as k-spaced head STGCs. To find a new code, three constraints on generating sequences are proposed to accelerate the searching algorithm, and the complete searching result of length-6 STGCs is initially obtained. Among the entire 132 length-6 STGCs, two novel types of STGCs with non-k-spaced heads are found, and the basic structures of these codes with the general length n are proposed and defined as twin-necklace and triplet-necklace ordering STGCs. Furthermore, d-plet-necklace ordering STGC, which unifies all the known STGCs by changing the value of d, is also defined. Finally, a single-track absolute encoder prototype is designed to prove that STGCs are as convenient as the traditional position coding methods.
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Gao, Zhenyi, Bin Zhou, Chao Li, Bo Hou, Haobo Sun, Qi Wei, and Rong Zhang. "Design and Implementation of a System-on-Chip for Self-Calibration of an Angular Position Sensor." Applied Sciences 9, no. 22 (November 8, 2019): 4772. http://dx.doi.org/10.3390/app9224772.

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In this study, a novel signal processing algorithm and hardware processing circuit for the self-calibration of angular position sensors is proposed. To calibrate error components commonly found in angular position sensors, a parameter identification algorithm based on the least mean square error demodulation is developed. A processor to run programs and a coprocessor based on the above algorithm are used and designed to form a System-on-Chip, which can calibrate signals as well as implement parameter configuration and control algorithm applications. In order to verify the theoretical validity of the design, analysis and simulation verification of the scheme are carried out, and the maximum absolute error value in the algorithm simulation is reduced to 0.003 %. The circuit’s Register-Transfer Level simulation shows that the maximum absolute value of the angular error is reduced to 0.03%. Simulation results verify the calibration performance with and without quantization and rounding error, respectively. The entire system is prototyped on a Field Programmable Gate Array and tested on a Capacitive Angular Position Sensor. The proposed scheme can reduce the absolute value of angular error to 4.36%, compared to 7.68% from the experimental results of a different calibration scheme.
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Zhang, Zijian, Yangyang Dong, Fenglei Ni, Minghe Jin, and Hong Liu. "A Method for Measurement of Absolute Angular Position and Application in a Novel Electromagnetic Encoder System." Journal of Sensors 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/503852.

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For the encoders, especially the sine-cosine magnetic ones, a new method to measure absolute angular position is proposed in the paper. In the method, the code disc of the encoder has only two circle tracks and each one was divided intoNand (N-1) equal code cells. The cell angles, changing from 0° to 360° between any two neighboring code cells, are defined to represent any position on the code disc. The position value of the same point can be represented by different cell angle values of different tracks and the absolute angular position of the point can be obtained by the difference value between the cell angle value of the outer track and the inner one. To validate the correctness of the method theoretically, the derivation process of the method was provided. An electromagnetic encoder system was designed and the experimental platform was established to test the method. The experimental results indicate that the electromagnetic encoder can measure the absolute angular position. Besides, it shows that the method is easy to be realized in algorithm and can reduce computational complexity and decrease dimension of the encoder.
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Nakajima, Hajime, Kazuhiko Sumi, and Hiroshi Inujima. "Absolute Rotary Angular Measurement by Using Multi Electrode Circular Position Sensitive Detector." IEEJ Transactions on Industry Applications 129, no. 10 (2009): 989–94. http://dx.doi.org/10.1541/ieejias.129.989.

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Akkaya, Ramazan, and Fatih Alpaslan Kazan. "A New Method for Angular Speed Measurement with Absolute Encoder." Elektronika ir Elektrotechnika 26, no. 1 (February 16, 2020): 18–22. http://dx.doi.org/10.5755/j01.eie.26.1.25307.

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The encoders are electromechanical devices that give information about the angular position and the number of turns of the shaft, which they are connected. These devices are divided into digital or analogue according to output types. On digital outputs, the output can be binary coded, gray coded or pulsed. The frequency (M) or period (T) method produces accurate results in pulse-output encoders. However, these methods alone cannot give accurate results in some encoder types, which are saw tooth type encoders that produce analogue outputs in different shapes. In this study, a new method was proposed, which reduces the relative error ratio too much below 1 % in an absolute encoder that produces an analogue output ranging from 0 V to 5 V according to the angular position of the shaft. Unlike in the studies in the literature, M method and Analog Digital Converter (ADC) were used together. Thanks to this proposed method (M + ADC), it is possible to increase the measurement accuracy of the encoders with analogue output in all speed regions.
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Sreenivasan, S. V., and K. J. Waldron. "A Drift-Free Navigation System for a Mobile Robot Operating on Unstructured Terrain." Journal of Mechanical Design 116, no. 3 (September 1, 1994): 894–900. http://dx.doi.org/10.1115/1.2919466.

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The orientation and the angular rates of the body of a robotic vehicle are required for the guidance and control of the vehicle. In the current robotic systems these quantities are obtained by the use of inertial sensing systems. Inertial sensing systems involve drift errors which can be significant even after the vehicle has traversed only short distances on the terrain. A different approach is suggested here which guarantees accurate, drift-free sensing of the angular position and rates of the vehicle body. A camera system consisting of two cameras in fixed relationship to one another is made to continuously track two stationary objects (stars or the sun). The camera system is mounted on the vehicle body through an actuated three-degree-of-freedom joint. The angular positions and rates of these joints can be used to evaluate the angular positions and rates of the vehicle body. An estimate of the absolute position of the vehicle on the terrain can also be obtained from this sensing system. This can serve as the primary system for estimating the position of a vehicle on a planet, or as an inexpensive alternative/backup to a more accurate Global Positioning System (GPS) for estimating the position of a vehicle on earth.
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Dissertations / Theses on the topic "Absolute angular position"

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Jovan, Bajić. "Метода мерења угаоног положаја на бази нове класе оптоелектронских сензора." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=95593&source=NDLTD&language=en.

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У овој докторској дисертацији извршен је преглед постојећих метода мерења угаоног положаја и дат је предлог нове методе за мерење апсолутног угаоног положаја. Предложена мерна метода заснива се на примени трансформације боје објекта из Декартовог RGB простора боја у неки од цилиндричних, кориснички оријентисаних, простора боја (HSV, HSI, HLS). На бази предложене мерне методе конструисан је сензор апсолутног угаоног положаја који се састоји од три оптичка рефлексиона сензора и штампаног шаблона са сивом скалом. Тачност, поновљивост и резолуција мерења, постигнути приликом тестирања сензора су ±1 °, ±0,3 ° и 0,1 °.
U ovoj doktorskoj disertaciji izvršen je pregled postojećih metoda merenja ugaonog položaja i dat je predlog nove metode za merenje apsolutnog ugaonog položaja. Predložena merna metoda zasniva se na primeni transformacije boje objekta iz Dekartovog RGB prostora boja u neki od cilindričnih, korisnički orijentisanih, prostora boja (HSV, HSI, HLS). Na bazi predložene merne metode konstruisan je senzor apsolutnog ugaonog položaja koji se sastoji od tri optička refleksiona senzora i štampanog šablona sa sivom skalom. Tačnost, ponovljivost i rezolucija merenja, postignuti prilikom testiranja senzora su ±1 °, ±0,3 ° i 0,1 °.
In this doctoral thesis a review of existing methods for angular positionmeasurement is conducted and a new method for measuring absoluteangular position is proposed. The proposed measurement method is basedon the use of object color transformation from Cartesian RGB color space toone of the user-oriented cylindrical color space (HSV, HSI, HLS). Оn thebasis of the proposed measurement method, absolute angular positionsensor consisting of three optical reflective sensors and a grayscale printedpattern is constructed. Accuracy, repeatability and resolution ofmeasurement using proposed sensor were ± 1 °, ± 0.3 ° and 0.1 °.
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Book chapters on the topic "Absolute angular position"

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Grueger, H., and H. Lakner. "High Resolution Absolute Angular Position Detection with Single Chip Capability." In Advanced Microsystems for Automotive Applications Yearbook 2002, 222–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-18213-6_26.

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Conference papers on the topic "Absolute angular position"

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Schneider, T., B. Eilert, M. Stonis, and L. Overmeyer. "Validation of an optical system for measuring the absolute angular position." In 2017 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM). IEEE, 2017. http://dx.doi.org/10.1109/ieem.2017.8289939.

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Brock, Stefan. "Estimation of low rotational speed based on the measurement of absolute angular position." In 2016 13th Selected Issues of Electrical Engineering and Electronics (WZEE). IEEE, 2016. http://dx.doi.org/10.1109/wzee.2016.7800205.

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Reddy, Battu Prakash, Ashwin Murali, and Ganesh Shaga. "Low cost planar coil structure for inductive sensors to measure absolute angular position." In 2017 2nd International Conference on Frontiers of Sensors Technologies (ICFST). IEEE, 2017. http://dx.doi.org/10.1109/icfst.2017.8210463.

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Wang, Hewen, Kai Peng, Xiaokang Liu, Zhicheng Yu, and Hongji Pu. "A novel miniaturized capacitive absolute angular position sensor based on time-grating with reflective structure." In 10th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI 2018), edited by Jiubin Tan and Jie Lin. SPIE, 2019. http://dx.doi.org/10.1117/12.2511713.

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Zhao, Nan, and Soichi Ibaraki. "Calibration and Compensation of Rotary Axis Angular Positioning Deviations on a SCARA-Type Industrial Robot Using a Laser Tracker." In JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/lemp2020-8502.

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Abstract In general, the “absolute” positioning accuracy of industrial robots is significantly lower than its repeatability. In the past research, in order to improve a robot’s positioning accuracy over the entire workspace, the compensation for the link length errors and the rotation axis angle offsets are often employed. However, the positioning error of the compensated industrial robot is still much higher than that of a typical machine tool. The purpose of this study is to propose a new kinematic model and its calibration scheme to further improve the absolute positional accuracy of an industrial robot over the entire workspace. In order to simplify the problem, this study only targets the 2D positioning accuracy of a SCARA-type robot. The proposed model includes not only link length errors and rotary axis angular offsets but also the “error map” of the angular positioning deviation of each rotary axis. The angular error deviation of each rotary axis is identified by measuring the robot’s end-effector position by a laser tracker at many positions. To verify the validity of the identified model, the effectiveness of the compensation based on it is also investigated.
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Ahlberg, Charlotte, Fredrik Lundell, and L. Daniel So¨derberg. "Self-Organization of Fibers in a Suspension Between Two Counter-Rotating Discs." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78127.

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The behavior of fibers suspended in a flow between two flat counter-rotating discs has been studied experimentally. Captured images of the fibers in the flow were analyzed by steerable filters, to extract positions and orientations of the fibers. Experiments were performed for gaps between the discs of less than one fiber length, and for equal absolute values of the angular velocities for the discs. The length-to-diameter ratio of the fibers was approximately 14. During certain conditions, the fibers organized themselves in a distinct manner, which we will denote as fiber trains, in which three or more fibers are aligned next to each other, at the same radial position, with a short fiber-to-fiber distance. The direction of the individual fibers is radial and the direction of the whole train is tangential. Trains containing more than 60 fibers have been observed and are quite impressing.
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Hießl, Arnold, and Rudolf Scheidl. "Energy Consumption and Efficiency Measurements of Different Excavators: Does Hybridization Pay?" In ASME/BATH 2015 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/fpmc2015-9568.

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A series of detailed measurements of various mechanical and hydraulic system states of different excavators was performed. Main purpose of this study was to obtain a reliable information basis for assessing the potentials of hybrid drives, in particular the amount of recoverable energy. Differences concerned the size (tonnage) of the excavators and the hydraulic systems, open center versus load sensing. All machines were tested at the same set of operation scenarios, which are typical for practice, and with different operators. To this end, all test machines have been equipped with pressure, flow rate, temperature, angular and position sensors. These signals (about sixty) and several available from the machines CAN bus were recorded with a standard data acquisition system and electronically stored for later analysis. These raw data were processed to obtain the interesting data, like speeds, power flows, energies. In addition, videos of each test were recorded to facilitate the correct interpretation of the measurements and their correlation with the actual working processes. Power flows from the combustion engine, different pumps, and at each actuator and energetic losses at the different loss sources were plotted for the different operation scenarios. Total efficiencies of the machines for different scenarios and the energy in and outflow at each actuator were computed. From the latter so called relative and absolute recovery degrees for each actuator and for the total machine in the different operation scenarios were derived. The relative recovery degree is the ratio of the total outflow energy (second and fourth quadrant) and the total inflow energy (first and third quadrant). The absolute recovery degree is the ratio of the total outflow energy of an actuator and the total energy delivered by all pumps in an operation scenario. In most operation scenarios the total efficiency of consumed mechanical output energy at the hydraulic actuators relative to delivered hydraulic energy is in the range 15% to 25%. Reasonable recovery potentials do have the swing and the boom drive. For small machines, however, the boom drive dominates.
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Alam, Md Moktadir, Soichi Ibaraki, Koki Fukuda, Sho Morita, and Hiroshi Usuki. "Identification of a Kinematic Model of a 6DOF Industrial Manipulator With Angular Positioning Deviation “Error Map” of Rotary Axes." In 2020 International Symposium on Flexible Automation. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/isfa2020-9655.

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Abstract To improve the overall “absolute” positioning accuracy for the industrial manipulator, it is indispensable to calibrate its kinematic parameters. In conventional studies, researchers have focused on Denavit–Hartenberg (D-H) parameters. However, until now, for industrial manipulators, the absolute accuracy is significantly poor than its repeatability. In this study, we propose a new kinematic model of a 6DOF (degrees of freedom) industrial manipulator with the angular positioning deviation “error map” of each rotary axis. The angular positioning deviation is modeled as a function of command angular positions, as well as the rotation direction to model the influence of backlash. We also propose a method to identify the angular positioning deviation of all the rotary axes by using a laser tracker.
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Balkan, Tuna, and Mehmet Emin Ari. "Fuzzy Control of an Inverted Pendulum." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/cie-1441.

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Abstract An inverted pendulum system has been designed and constructed as a physical model of inherently unstable mechanical systems. The vertical upright position of a pendulum is controlled by changing the horizontal position of a cart to which the pendulum is hinged. The stability of the system has been investigated when a fuzzy controller is used to produce the control signal, while making a single measurement. It has been shown that by using simple fuzzy rules to allow real time computation with a single angular position measurement, the system can not be made absolutely stable. However, the stability and performance of the system have been considerably improved by shrinking the membership functions of angular position, computed angular velocity and control signal when inverted pendulum is very close to the vertical upright position.
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Dong, Wei, Wuli Chu, Xiangjun Li, and Yanhui Wu. "Numerical Analysis of the Influences of Balance Hole Diameter on the Flow Characteristics of the Back Chamber of Centrifugal Pump." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56372.

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The flow characteristic inside a pump chamber is the core problem in the study of the thrust force of a centrifugal pump. A numerical study on the IS150-125-315-type centrifugal pump with four different balance hole diameters was conducted. By selecting clear water as the medium, the time-averaged continuity equation with relative coordinates and the Navier-Stokes equation are established on the basis of the FLUENT software. The RNG k–ε equation turbulence model and the SIMPLEC algorithm are used to conduct a numerical simulation. The numerical results match the accuracy of the design values on the performance of the pump. The test results match the accuracy of the numerical results on the pressure of the back chamber and clearance leakage of the back seal ring. The influence of balance hole diameters is revealed in the flow field of the back chamber of the centrifugal pump. In detail, the patterns of the axial and radial distributions of the dimensionless tangential and radial velocities and the spanwise distribution of their average values in the back chamber of the centrifugal pump with different balance hole diameters are investigated. The relationship is also obtained between fluid rotational angular velocity in the back chamber of the centrifugal pump and rotational angular velocity of the impeller. The results reveal that the turbulent boundary layer and core region of the flow always exist in the pump chamber, even if there are no balance holes. The increase in diameter of the balance holes is associated with the increase in the radial component in the core region velocity and the decrease in the value range of its tangential component. At a certain radius and angular position, the diameter of larger balance holes leads to higher normalized tangential velocity in the core region. At the same time, a higher absolute value of the normalized radial velocity near the pump cover corresponds to greater radial leakage. At the same balance hole diameters, the rotating speed of the core region fluid generally keeps constant along the axial direction, whereas a significant difference is observed along the radial and tangential directions. The dimensionless radial and tangential velocities are significantly influenced by the flow of the volute chamber in the pump and are rarely influenced by the changes in the balance hole diameters, and vice versa. The dimensionless radial velocity will exert more power on large sections, such as sections 5 and 7, than the dimensionless tangential velocity, and vice versa. For cases with balance hole diameters less than its design value, dimensionless tangential average velocity is less than 0.5 with increases and dimensionless radial average velocity is less than 0 with decreases along the radial direction in the flow core area. Otherwise, dimensionless tangential average velocity is approximately equal to 0.59 and dimensionless radial average velocity is approximately equal to 0 in the flow core area. The balance hole diameter changes from 0 mm to 12 mm, and the rotating speed of the core region fluid is 0–0.8 times, rather than half, that of the impeller.
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