Journal articles: 'Mechanical power'

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Brochard, Laurent, and Andrew Bersten. "Mechanical Power." Anesthesiology 130, no. 1 (January 1, 2019): 9–11. http://dx.doi.org/10.1097/aln.0000000000002505.

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Pavlov, V. D. "On the ambiguity of mechanical power." Advanced Engineering Research 22, no. 1 (March 30, 2022): 24–29. http://dx.doi.org/10.23947/2687-1653-2022-22-1-24-29.

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Introduction. Mechanical vibrations are widespread in the production processes. The drives of machines and mechanisms are mainly electromechanical, so mechanical reactive power is transformed into electrical reactive power of the network, impairing the quality of electricity. This explains the significance of considering the mechanical reactive power, and, as a consequence, the urgency of the presented study. The research objective is to detail the types of mechanical power under harmonic vibrations.Materials and Methods. The literature on the issues of dynamics, kinematics, vibrations, transformation of motion in oscillatory systems, etc., has been studied. Theoretical, mainly mathematical methods of research are used.Results. The powers developed under elastic deformations, forced harmonic vibrations of an inert body, and vibrations associated with gravitational influence, as well as reactive, active, full powers in the complex formulation, and mechanical powers in the vector representation are mathematically interpreted.Discussion and Conclusions. Under the mechanical harmonic vibrations, along with the sign-positive thermal power, sign-variable reactive powers develop, characterizing the reversibility of kinetic and potential energies. The total mechanical power satisfies the Pythagorean formula. The concept of mechanical reactive, active, and total powers generalizes the corresponding concepts of power from electrical engineering, and thus manifesting electromechanical dualism.

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Popov, Igor Pavlovich. "VARIETY OF MECHANICAL POWER." Проблемы машиностроения и автоматизации, no. 1 (2022): 19–23. http://dx.doi.org/10.52261/02346206_2022_1_19.

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Askew, G. N., and D. J. Ellerby. "The mechanical power requirements of avian flight." Biology Letters 3, no. 4 (May 16, 2007): 445–48. http://dx.doi.org/10.1098/rsbl.2007.0182.

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A major goal of flight research has been to establish the relationship between the mechanical power requirements of flight and flight speed. This relationship is central to our understanding of the ecology and evolution of bird flight behaviour. Current approaches to determining flight power have relied on a variety of indirect measurements and led to a controversy over the shape of the power–speed relationship and a lack of quantitative agreement between the different techniques. We have used a new approach to determine flight power at a range of speeds based on the performance of the pectoralis muscles. As such, our measurements provide a unique dataset for comparison with other methods. Here we show that in budgerigars ( Melopsittacus undulatus ) and zebra finches ( Taenopygia guttata ) power is modulated with flight speed, resulting in U-shaped power–speed relationship. Our measured muscle powers agreed well with a range of powers predicted using an aerodynamic model. Assessing the accuracy of mechanical power calculated using such models is essential as they are the basis for determining flight efficiency when compared to measurements of flight metabolic rate and for predicting minimum power and maximum range speeds, key determinants of optimal flight behaviour in the field.

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HIRANO, Takayuki, Yuki YAMADA, and Yasuhiro KAKINUMA. "1704 Sensor-less Chatter Vibration Monitoring by Mechanical Power Factor." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2015.8 (2015): _1704–1_—_1704–5_. http://dx.doi.org/10.1299/jsmelem.2015.8._1704-1_.

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Oledzki, Wieslaw J. "Split power hydro-mechanical transmission with power circulation." Journal of the Chinese Institute of Engineers 41, no. 4 (May 19, 2018): 333–41. http://dx.doi.org/10.1080/02533839.2018.1473808.

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Paudel, Robin, Christine A. Trinkle, Christopher M. Waters, Lauren E. Robinson, Evan Cassity, Jamie L. Sturgill, Richard Broaddus, and Peter E. Morris. "Mechanical Power: A New Concept in Mechanical Ventilation." American Journal of the Medical Sciences 362, no. 6 (December 2021): 537–45. http://dx.doi.org/10.1016/j.amjms.2021.09.004.

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Pavlov, V. D. "Mechanical power under harmonic influences." Modern Technologies. System Analysis. Modeling, no. 1 (2022): 30–38. http://dx.doi.org/10.26731/1813-9108.2022.1(73).30-38.

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Tonetti, Tommaso, Massimo Cressoni, Francesca Collino, Giorgia Maiolo, Francesca Rapetti, Michael Quintel, and Luciano Gattinoni. "Volutrauma, Atelectrauma, and Mechanical Power." Critical Care Medicine 45, no. 3 (March 2017): e327-e328. http://dx.doi.org/10.1097/ccm.0000000000002193.

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Kirkendall, D. T., and G. M. Street. "Mechanical jumping power in athletes." British Journal of Sports Medicine 20, no. 4 (December 1, 1986): 163–64. http://dx.doi.org/10.1136/bjsm.20.4.163.

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Shannon, Mark A., Boris Rubinsky, and Richard E. Russo. "Mechanical stress power measurements during high‐power laser ablation." Journal of Applied Physics 80, no. 8 (October 15, 1996): 4665–72. http://dx.doi.org/10.1063/1.363450.

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Samary, Cynthia S., Pedro L. Silva, Marcelo Gama de Abreu, Paolo Pelosi, and Patricia R. M. Rocco. "Ventilator-induced Lung Injury: Power to the Mechanical Power." Anesthesiology 125, no. 5 (November 1, 2016): 1070–71. http://dx.doi.org/10.1097/aln.0000000000001297.

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Neto, Ary Serpa, Rodrigo Octavio Deliberato, Alistair E. Johnson, Pedro Amorim, Silvio Moreto Pereira, Denise Carnieli Cazati, Ricardo Luiz Cordioli, et al. "Mechanical power during mechanical ventilation of critically ill patients." Journal of Critical Care 42 (December 2017): 392. http://dx.doi.org/10.1016/j.jcrc.2017.09.067.

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Holtzhausen, David, and Yoon Soo Kim. "Electro-Mechanical Maximum Power Point Tracking of Photovoltaic System." Applied Mechanics and Materials 300-301 (February 2013): 371–77. http://dx.doi.org/10.4028/www.scientific.net/amm.300-301.371.

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This paper is concerned with optimisation of the power produced by a photovoltaic (PV) panel through designing, building and implementing maximum power point tracking (MPPT). In the literature, the MPPT has been normally approached either electronically (using a DC-to-DC converter) or mechanically (controlling the orientation of a PV panel). In this paper, these two approaches are combined to yield more power. To this end, for a given PV panel (available at the first author’s institution) which is already equipped with a mechanical tracking device, a Buck (DC-to-DC) converter is designed to improve the power saving which could be achieved by the mechanical tracking alone. Also, new electronic and mechanical MPPT methods are developed, and their combination, so-called electro-mechanical MPPT, is tested in a real environment to verify its usefulness.

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Mucsi, Gábor. "Mechanical activation of power station fl y ash by grinding – A review." Epitoanyag - Journal of Silicate Based and Composite Materials 68, no. 2 (2016): 56–61. http://dx.doi.org/10.14382/epitoanyag-jsbcm.2016.10.

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Cressoni, Massimo, Miriam Gotti, Chiara Chiurazzi, Dario Massari, Ilaria Algieri, Martina Amini, Antonio Cammaroto, et al. "Mechanical Power and Development of Ventilator-induced Lung Injury." Anesthesiology 124, no. 5 (May 1, 2016): 1100–1108. http://dx.doi.org/10.1097/aln.0000000000001056.

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Abstract Background The ventilator works mechanically on the lung parenchyma. The authors set out to obtain the proof of concept that ventilator-induced lung injury (VILI) depends on the mechanical power applied to the lung. Methods Mechanical power was defined as the function of transpulmonary pressure, tidal volume (TV), and respiratory rate. Three piglets were ventilated with a mechanical power known to be lethal (TV, 38 ml/kg; plateau pressure, 27 cm H2O; and respiratory rate, 15 breaths/min). Other groups (three piglets each) were ventilated with the same TV per kilogram and transpulmonary pressure but at the respiratory rates of 12, 9, 6, and 3 breaths/min. The authors identified a mechanical power threshold for VILI and did nine additional experiments at the respiratory rate of 35 breaths/min and mechanical power below (TV 11 ml/kg) and above (TV 22 ml/kg) the threshold. Results In the 15 experiments to detect the threshold for VILI, up to a mechanical power of approximately 12 J/min (respiratory rate, 9 breaths/min), the computed tomography scans showed mostly isolated densities, whereas at the mechanical power above approximately 12 J/min, all piglets developed whole-lung edema. In the nine confirmatory experiments, the five piglets ventilated above the power threshold developed VILI, but the four piglets ventilated below did not. By grouping all 24 piglets, the authors found a significant relationship between the mechanical power applied to the lung and the increase in lung weight (r2 = 0.41, P = 0.001) and lung elastance (r2 = 0.33, P < 0.01) and decrease in Pao2/Fio2 (r2 = 0.40, P < 0.001) at the end of the study. Conclusion In piglets, VILI develops if a mechanical power threshold is exceeded.

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Damm, Gilney, Françoise Lamnabhi-Lagarrigue, and Riccardo Marino. "Adaptive Nonlinear Control of Power Generators with Unknown Mechanical Power." IFAC Proceedings Volumes 34, no. 13 (August 2001): 375–80. http://dx.doi.org/10.1016/s1474-6670(17)39019-5.

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Bodduluri, Mani Teja, Torben Dankwort, Thomas Lisec, Sven Grünzig, Anmol Khare, Minhaz Ahmed, and Björn Gojdka. "Fully Integrated High-Performance MEMS Energy Harvester for Mechanical and Contactless Magnetic Excitation in Resonance and at Low Frequencies." Micromachines 13, no. 6 (May 30, 2022): 863. http://dx.doi.org/10.3390/mi13060863.

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Energy harvesting and storage is highly demanded to enhance the lifetime of autonomous systems, such as IoT sensor nodes, avoiding costly and time-consuming battery replacement. However, cost efficient and small-scale energy harvesting systems with reasonable power output are still subjects of current development. In this work, we present a mechanically and magnetically excitable MEMS vibrational piezoelectric energy harvester featuring wafer-level integrated rare-earth micromagnets. The latter enable harvesting of energy efficiently both in resonance and from low-g, low-frequency mechanical energy sources. Under rotational magnetic excitation at frequencies below 50 Hz, RMS power output up to 74.11 µW is demonstrated in frequency up-conversion. Magnetic excitation in resonance results in open-circuit voltages > 9 V and RMS power output up to 139.39 µW. For purely mechanical excitation, the powder-based integration process allows the realization of high-density and thus compact proof masses in the cantilever design. Accordingly, the device achieves 24.75 µW power output under mechanical excitation of 0.75 g at resonance. The ability to load a capacitance of 2.8 µF at 2.5 V within 30 s is demonstrated, facilitating a custom design low-power ASIC.

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Dial, K. P., A. A. Biewener, B. W. Tobalske, and D. R. Warrick. "Mechanical power output of bird flight." Nature 390, no. 6655 (November 1997): 67–70. http://dx.doi.org/10.1038/36330.

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VIITASALO, J. T., L. ÖSTERBACK, M. ALEN, P. RAHKILA, and E. HAVAS. "Mechanical jumping power in young athletes." Acta Physiologica Scandinavica 131, no. 1 (September 1987): 139–45. http://dx.doi.org/10.1111/j.1748-1716.1987.tb08215.x.

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Silva, Pedro L., Paolo Pelosi, and Patricia R. M. Rocco. "Understanding the Mysteries of Mechanical Power." Anesthesiology 132, no. 5 (May 1, 2020): 949–50. http://dx.doi.org/10.1097/aln.0000000000003222.

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Costa, Nancy. "Contrast Media and Mechanical Power Injection." Journal of Radiology Nursing 24, no. 2 (June 2005): 33. http://dx.doi.org/10.1016/j.jradnu.2005.04.007.

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Ashirov, Timur, and Ali Coskun. "The Power of the Mechanical Bond." Chem 4, no. 10 (October 2018): 2260–62. http://dx.doi.org/10.1016/j.chempr.2018.09.022.

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Peleg, Kalman. "Power and energy in mechanical systems." International Journal of Mechanical Sciences 29, no. 4 (January 1987): 259–69. http://dx.doi.org/10.1016/0020-7403(87)90039-7.

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Eckels, Edward C., Shubhasis Haldar, Rafael Tapia-Rojo, Jaime Andrés Rivas-Pardo, and Julio M. Fernández. "The Mechanical Power of Titin Folding." Cell Reports 27, no. 6 (May 2019): 1836–47. http://dx.doi.org/10.1016/j.celrep.2019.04.046.

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Plesca, Adrian T. "Mechanical Analysis of Power Electromagnetic Contactors." Indian Journal of Science and Technology 6, no. 8 (August 20, 2013): 1–6. http://dx.doi.org/10.17485/ijst/2013/v6i8.20.

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McCloy, D. "The power consumption of mechanical legs." Mechanism and Machine Theory 26, no. 2 (January 1991): 185–96. http://dx.doi.org/10.1016/0094-114x(91)90082-f.

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Pelger, Christian, Georg Jacobs, Heinz-Dieter Schneider, and Achim Feldermann. "Power-split Drives with Mechanical Variators." ATZoffhighway worldwide 10, no. 1 (March 2017): 8–15. http://dx.doi.org/10.1007/s41321-017-0005-8.

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Herák, D., V. Šleger, R. Chotěborský, K. Houška, and E. Janča. "Kinematical characteristic of mechanical frictional variable speed drive." Research in Agricultural Engineering 52, No. 2 (February 7, 2012): 61–68. http://dx.doi.org/10.17221/4881-rae.

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The paper describes a new system of mechanical spherical conical friction drive. In the present a row of simple friction, belt, chain, wave and differential variable speed drives is published. For the required range of speed variation they are altogether unfit. The currently used power transmissions are of low efficiency (60–70%). Therefore the better power transmission efficiency is required. The possibility of multicontact power transmission appears as the most suitable principle of the power transmission. Using the designed function model, which was made according to the small tractor producers requirements, the real output kinematical characteristic was measured. It is derived the complete drive conversion unit kinematics and the theoretical kinematical characteristic design. The theoretical design is compared with the real characteristic determined by measuring using the test station. From the measured values we determined that the geometrical characteristic, i.e. the relation between output speed and ring position, corresponds in the ring position range (2.8÷14) mm to the theoretical premise.

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ZLOKOLICA, Miodrag, Maja CAVIC, and Milan KOSTIC. "MPT-05 GENERAL APPROACH TO THE DYNAMICAL BEHAVIOR OF POWER TRANSMISSION AS NONHOLONOMIC SYSTEM(MECHANICAL MOTION AND POWER TRANSMISSION SYSTEMS)." Proceedings of the JSME international conference on motion and power transmissions 2009 (2009): 579–83. http://dx.doi.org/10.1299/jsmeimpt.2009.579.

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Roberts, Thomas J., and Jeffrey A. Scales. "Mechanical power output during running accelerations in wild turkeys." Journal of Experimental Biology 205, no. 10 (May 15, 2002): 1485–94. http://dx.doi.org/10.1242/jeb.205.10.1485.

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SUMMARYWe tested the hypothesis that the hindlimb muscles of wild turkeys(Meleagris gallopavo) can produce maximal power during running accelerations. The mechanical power developed during single running steps was calculated from force-plate and high-speed video measurements as turkeys accelerated over a trackway. Steady-speed running steps and accelerations were compared to determine how turkeys alter their running mechanics from a low-power to a high-power gait. During maximal accelerations, turkeys eliminated two features of running mechanics that are characteristic of steady-speed running: (i) they produced purely propulsive horizontal ground reaction forces, with no braking forces, and (ii) they produced purely positive work during stance, with no decrease in the mechanical energy of the body during the step. The braking and propulsive forces ordinarily developed during steady-speed running are important for balance because they align the ground reaction force vector with the center of mass. Increases in acceleration in turkeys correlated with decreases in the angle of limb protraction at toe-down and increases in the angle of limb retraction at toe-off. These kinematic changes allow turkeys to maintain the alignment of the center of mass and ground reaction force vector during accelerations when large propulsive forces result in a forward-directed ground reaction force. During the highest accelerations, turkeys produced exclusively positive mechanical power. The measured power output during acceleration divided by the total hindlimb muscle mass yielded estimates of peak instantaneous power output in excess of 400 W kg-1 hindlimb muscle mass. This value exceeds estimates of peak instantaneous power output of turkey muscle fibers. The mean power developed during the entire stance phase increased from approximately zero during steady-speed runs to more than 150 W kg-1muscle during the highest accelerations. The high power outputs observed during accelerations suggest that elastic energy storage and recovery may redistribute muscle power during acceleration. Elastic mechanisms may expand the functional range of muscle contractile elements in running animals by allowing muscles to vary their mechanical function from force-producing struts during steady-speed running to power-producing motors during acceleration.

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Martucci, Alessandra, Alberta Aversa, Diego Manfredi, Federica Bondioli, Sara Biamino, Daniele Ugues, Mariangela Lombardi, and Paolo Fino. "Low-Power Laser Powder Bed Fusion Processing of Scalmalloy®." Materials 15, no. 9 (April 26, 2022): 3123. http://dx.doi.org/10.3390/ma15093123.

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Among recently developed high-strength and lightweight alloys, the high-performance Scalmalloy® certainly stands out for laser powder bed fusion (LPBF) production. The primary goal of this study was to optimize the Scalmalloy® LPBF process parameters by setting power values suitable for the use of lab-scale machines. Despite that these LPBF machines are commonly characterized by considerably lower maximum power values (around 100 W) compared to industrial-scale machines (up to 480 W), they are widely used when quick setup and short processing time are needed and a limited amount of powder is available. In order to obtain the optimal process parameters, the influence of volumetric energy density (VED) on the sample porosity, microstructure and mechanical properties was accurately studied. The obtained results reveal the stability of the microstructural and mechanical behaviour of the alloy for VEDs higher than 175 Jmm−3. In this way, an energy-and-time-saving choice at low VEDs can be taken for the LPBF production of Scalmalloy®. After identifying the low-power optimized process parameters, the effects of the heat treatment on the microstructural and mechanical properties were investigated. The results prove that low-VED heat-treated samples produced with an LPBF lab-scale machine can achieve outstanding mechanical performance compared with the results of energy-intensive industrial production.

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Martucci, Alessandra, Alberta Aversa, Diego Manfredi, Federica Bondioli, Sara Biamino, Daniele Ugues, Mariangela Lombardi, and Paolo Fino. "Low-Power Laser Powder Bed Fusion Processing of Scalmalloy®." Materials 15, no. 9 (April 26, 2022): 3123. http://dx.doi.org/10.3390/ma15093123.

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Among recently developed high-strength and lightweight alloys, the high-performance Scalmalloy® certainly stands out for laser powder bed fusion (LPBF) production. The primary goal of this study was to optimize the Scalmalloy® LPBF process parameters by setting power values suitable for the use of lab-scale machines. Despite that these LPBF machines are commonly characterized by considerably lower maximum power values (around 100 W) compared to industrial-scale machines (up to 480 W), they are widely used when quick setup and short processing time are needed and a limited amount of powder is available. In order to obtain the optimal process parameters, the influence of volumetric energy density (VED) on the sample porosity, microstructure and mechanical properties was accurately studied. The obtained results reveal the stability of the microstructural and mechanical behaviour of the alloy for VEDs higher than 175 Jmm−3. In this way, an energy-and-time-saving choice at low VEDs can be taken for the LPBF production of Scalmalloy®. After identifying the low-power optimized process parameters, the effects of the heat treatment on the microstructural and mechanical properties were investigated. The results prove that low-VED heat-treated samples produced with an LPBF lab-scale machine can achieve outstanding mechanical performance compared with the results of energy-intensive industrial production.

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Schulz, M. "Circulating mechanical power in a power-split hybrid electric vehicle transmission." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 218, no. 12 (December 2004): 1419–25. http://dx.doi.org/10.1243/0954407042707759.

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Es-Saheb, M. H. H. "Powder compaction interpretation using the power law." Journal of Materials Science 28, no. 5 (March 1993): 1269–75. http://dx.doi.org/10.1007/bf01191963.

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Hambric, S. A. "Power Flow and Mechanical Intensity Calculations in Structural Finite Element Analysis." Journal of Vibration and Acoustics 112, no. 4 (October 1, 1990): 542–49. http://dx.doi.org/10.1115/1.2930140.

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The identification of power flow paths in dynamically loaded structures is an important, but currently unavailable, capability for the finite element analyst. For this reason, methods for calculating power flows and mechanical intensities in finite element models are developed here. Formulations for calculating input and output powers, power flows, and mechanical intensities for beam and plate/shell element types are derived. NASTRAN is used to calculate the required velocity, force, and stress results of an analysis, which a post-processor then uses to calculate power flow quantities. Test models include a simple truss and a beam-stiffened cantilever plate. Both test cases showed reasonable power flow fields over low to medium frequencies.

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Collino, Francesca, Francesca Rapetti, Francesco Vasques, Giorgia Maiolo, Tommaso Tonetti, Federica Romitti, Julia Niewenhuys, et al. "Positive End-expiratory Pressure and Mechanical Power." Anesthesiology 130, no. 1 (January 1, 2019): 119–30. http://dx.doi.org/10.1097/aln.0000000000002458.

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Abstract EDITOR’S PERSPECTIVE What We Already Know about This Topic Positive end-expiratory pressure protects against ventilation-induced lung injury by improving homogeneity of ventilation, but positive end-expiratory pressure contributes to the mechanical power required to ventilate the lung What This Article Tells Us That Is New This in vivo study (36 pigs mechanically ventilated in the prone position) suggests that low levels of positive end-expiratory pressure reduce injury associated with atelectasis, and above a threshold level of power, positive end-expiratory pressure causes lung injury and adverse hemodynamics Background Positive end-expiratory pressure is usually considered protective against ventilation-induced lung injury by reducing atelectrauma and improving lung homogeneity. However, positive end-expiratory pressure, together with tidal volume, gas flow, and respiratory rate, contributes to the mechanical power required to ventilate the lung. This study aimed at investigating the effects of increasing mechanical power by selectively modifying its positive end-expiratory pressure component. Methods Thirty-six healthy piglets (23.3 ± 2.3 kg) were ventilated prone for 50 h at 30 breaths/min and with a tidal volume equal to functional residual capacity. Positive end-expiratory pressure levels (0, 4, 7, 11, 14, and 18 cm H2O) were applied to six groups of six animals. Respiratory, gas exchange, and hemodynamic variables were recorded every 6 h. Lung weight and wet-to-dry ratio were measured, and histologic samples were collected. Results Lung mechanical power was similar at 0 (8.8 ± 3.8 J/min), 4 (8.9 ± 4.4 J/min), and 7 (9.6 ± 4.3 J/min) cm H2O positive end-expiratory pressure, and it linearly increased thereafter from 15.5 ± 3.6 J/min (positive end-expiratory pressure, 11 cm H2O) to 18.7 ± 6 J/min (positive end-expiratory pressure, 14 cm H2O) and 22 ± 6.1 J/min (positive end-expiratory pressure, 18 cm H2O). Lung elastances, vascular congestion, atelectasis, inflammation, and septal rupture decreased from zero end-expiratory pressure to 4 to 7 cm H2O (P < 0.0001) and increased progressively at higher positive end-expiratory pressure. At these higher positive end-expiratory pressure levels, striking hemodynamic impairment and death manifested (mortality 0% at positive end-expiratory pressure 0 to 11 cm H2O, 33% at 14 cm H2O, and 50% at 18 cm H2O positive end-expiratory pressure). From zero end-expiratory pressure to 18 cm H2O, mean pulmonary arterial pressure (from 19.7 ± 5.3 to 32.2 ± 9.2 mmHg), fluid administration (from 537 ± 403 to 2043 ± 930 ml), and noradrenaline infusion (0.04 ± 0.09 to 0.34 ± 0.31 μg · kg−1 · min−1) progressively increased (P < 0.0001). Lung weight and lung wet-to-dry ratios were not significantly different across the groups. The lung mechanical power level that best discriminated between more versus less severe damage was 13 ± 1 J/min. Conclusions Less than 7 cm H2O positive end-expiratory pressure reduced atelectrauma encountered at zero end-expiratory pressure. Above a defined power threshold, sustained positive end-expiratory pressure contributed to potentially lethal lung damage and hemodynamic impairment.

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ISHIKAWA, Michio. "Ambition of Mechanical Engineering from Power Engineering : Ambition of Mechanical Engineering." Journal of the Society of Mechanical Engineers 91, no. 830 (1988): 102–3. http://dx.doi.org/10.1299/jsmemag.91.830_102.

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Norman, Helen. "Power up." Consumer Electronics Test & Development 2021, no. 2 (January 2022): 24–25. http://dx.doi.org/10.12968/s2754-7744(23)70072-9.

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Charlie Pryor, applications engineer at Instron talks to Consumer Electronics Test & Development about the key mechanical testing processes required to finetune high energy density lithium-ion batteries

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TANAKA, Tomonari, and Toshio SUZUKI. "Power Saving Technique of Mechanical Vacuum Pump." Journal of the Vacuum Society of Japan 58, no. 7 (2015): 239–41. http://dx.doi.org/10.3131/jvsj2.58.239.

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Hambling, David. "Mechanical battery could power US Navy lasers." New Scientist 249, no. 3327 (March 2021): 15. http://dx.doi.org/10.1016/s0262-4079(21)00495-4.

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S V, Janugade, Yadav G A, and Mahadik O R. "Foot Steps Power Generation using Mechanical System." IARJSET 4, no. 1 (January 6, 2017): 55–59. http://dx.doi.org/10.17148/iarjset/ncdmete.2017.15.

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Ivanov, Viktor, Svitlana Ivanova, Georgi Tonkov, and Galyna Urum. "Perspective directions of mechanical power transmission research." MATEC Web of Conferences 366 (2022): 01005. http://dx.doi.org/10.1051/matecconf/202236601005.

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A lot of publications are devoted to the study of gear transmission, which cover all the features of their design, operation and repair. An in-depth analysis of factors that were not taken into account a decade ago was carried out. The efficiency of the drive, taking into account air resistance, and the stress-strain state of the tooth, taking into account centrifugal deformations, were determined. Thus, there are constant complication of the tasks that researchers set themselves. At the same time, recent achievements in the natural sciences have led to a narrowing of the field of use of gears. Thus, the electric motor replaced the internal combustion engine, which was an important object of research for mechanical engineers. The widespread use DC motors with speed control has led to the abandonment of gearboxes in electric vehicles and metalworking machines. Application of mechanical gears in devices. starting with ordinary watches, and ending with the mechanisms of computer disk drives, is a thing of the past. Further in-depth studies of gears, in some cases, don’t make sense, since the object of research disappears. It is important to identify areas of research that remain relevant in the 21st century. First of all, these are transmission studies that use the latest achievements in other areas of science. These include: the use of new materials in gears; use of new forms of tooth profiles and longitudinal forms of the tooth, without technological restrictions; analysis of the operation of the gear drive based on indirect indicators - the spectrum of noise and thermal fields of housings. Also, the study of gears in which the tooth is a working body, such as chain conveyors and pumps, will never lose relevance. Or, in which the gear train combines a number of functions, for example, the worm gears of elevators, which reduce the angular velocity and serve as a fuse.

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ZAWODNIAK, Józef J. "Mechanical Demage of Power Cables During Expoloitation." AUTOMATYKA, ELEKTRYKA, ZAKLOCENIA 7, no. 3 (25) 2016 (September 30, 2016): 34–41. http://dx.doi.org/10.17274/aez.2016.25.03.

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Chandrasekaran, Srinivasan, and Harender. "Power Generation Using Mechanical Wave Energy Converter." International Journal of Ocean and Climate Systems 3, no. 1 (March 2012): 57–70. http://dx.doi.org/10.1260/1759-3131.3.1.57.

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Abstract:

Ocean wave energy plays a significant role in meeting the growing demand of electric power. Economic, environmental, and technical advantages of wave energy set it apart from other renewable energy resources. Present study describes a newly proposed Mechanical Wave Energy Converter (MEWC) that is employed to harness heave motion of floating buoy to generate power. Focus is on the conceptual development of the device, illustrating details of component level analysis. Employed methodology has many advantages such as i) simple and easy fabrication; ii) easy to control the operations during rough weather; and iii) low failure rate during normal sea conditions. Experimental investigations carried out on the scaled model of MWEC show better performance and its capability to generate power at higher efficiency in regular wave fields. Design Failure Mode and Effect Analysis (FMEA) shows rare failure rates for all components except the floating buoy.

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Ovchinnikova, N. I., V. V. Bonnet, and A. V. Kosareva. "Simulation diagnostics of power train mechanical drives." IOP Conference Series: Earth and Environmental Science 548 (September 2, 2020): 052033. http://dx.doi.org/10.1088/1755-1315/548/5/052033.

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Martin, Philip E., and Don W. Morgan. "RELATIONSHIP BETWEEN MECHANICAL POWER AND RUNNING ECONOMY." Medicine and Science in Sports and Exercise 21, Supplement (April 1989): S79. http://dx.doi.org/10.1249/00005768-198904001-00473.

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Walker, A., and W. J. Gallagher. "Mechanical Limitations in High Average Power Linacs." IEEE Transactions on Nuclear Science 32, no. 5 (October 1985): 3125–27. http://dx.doi.org/10.1109/tns.1985.4334296.

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Macor, Alarico, and Antonio Rossetti. "Optimization of hydro-mechanical power split transmissions." Mechanism and Machine Theory 46, no. 12 (December 2011): 1901–19. http://dx.doi.org/10.1016/j.mechmachtheory.2011.07.007.

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Rajagopal, A. K., and Sumiyoshi Abe. "Statistical mechanical foundations of power-law distributions." Physica D: Nonlinear Phenomena 193, no. 1-4 (June 2004): 73–83. http://dx.doi.org/10.1016/j.physd.2004.01.010.

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Journal articles on the topic 'Mechanical power'

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