Relevant bibliographies by topics / Hard-acceleration

Academic literature on the topic 'Hard-acceleration'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Hard-acceleration"

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Su, Jie, Zhenghua Zhou, You Zhou, Xiaojun Li, Qing Dong, Yafei Wang, Yuping Li, and Liu Chen. "The Characteristics of Seismic Response on Hard Interlayer Sites." Advances in Civil Engineering 2020 (June 25, 2020): 1–11. http://dx.doi.org/10.1155/2020/1425969.

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Based on the engineering geological data of a nuclear power plant site, nine engineering geological profiles were created with hard interlayers of different thicknesses. The equivalent linearization method of seismic motion segment-input used for one-dimensional nonlinear seismic response analysis was applied to study the effect of the interlayer thickness on the peak acceleration and the acceleration response spectra of the site seismic response. The results showed that there was an obvious influence of hard interlayer thickness on site seismic responses. With the increase of hard interlayer thickness, the site nonlinear effect on seismic responses decreased. Under the same thickness of the hard interlayer, the nonlinear effect of the site was strengthened with the higher input peak acceleration. In addition, the short-period acceleration response spectrum was found to be significantly influenced by the hard interlayer and showed that the longer the period, the less influence of the hard interlayer on the acceleration response spectrum coordinates. Moreover, the influenced frequency band was wider with the increase in the thickness of hard interlayer.
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Hao, Hui Yan, Ya Bin Wang, Ming Jie Liu, and Xiao Feng Li. "Penetration Acceleration Signal Overload Rigid Separation Base on Local Mean Decomposition." Applied Mechanics and Materials 128-129 (October 2011): 938–41. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.938.

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Hard target penetration acceleration signals are non-stationary signals. In this paper use the local mean decomposition theory to analysis hard target penetration acceleration signals. Local mean decomposition can adaptively decompose any complex non-stationary signal into a number of physically meaningful instantaneous frequency components and these components could well reflect the intrinsic nature of the signals. Use local mean decomposition to separate the rigid projectile overload from hard target penetration acceleration signals. That provide reliable data to support accurately calculating the effective penetration depth, hard floors or holes through the number of target parameters on the penetration of weapons is significant. The author apply local mean decomposition algorithm in penetration acceleration signal separation and the results verify the effectiveness of the method.
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Masuda, S., and J. Sato. "Hard X-ray footpoint motion and acceleration mechanism." Advances in Space Research 32, no. 12 (January 2003): 2455–58. http://dx.doi.org/10.1016/j.asr.2003.03.003.

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Tian, Shuxia, Penghui Zhang, Liping Huang, Xueqian Song, Zhenmao Chen, Jianxiu Liu, Wenbin He, and Yang Cao. "Hard-point detection of catenary based on Hidden Markov Model." International Journal of Applied Electromagnetics and Mechanics 64, no. 1-4 (December 10, 2020): 701–9. http://dx.doi.org/10.3233/jae-209381.

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Hard-point detection is an important content of catenary detection. In this paper, the pantograph-catenary coupling model was established firstly. Then the vertical acceleration of pantograph during operation was calculated by using three-dimensional modeling software and finite element analysis software. The acceleration signal mixed with white noise was filtered by global default threshold, and the hard-point detection feature signal was obtained. Finally, the Hidden Markov Model corresponding to each state of the hard-point was obtained by using the characteristic signal, which verified the feasibility of the Hidden Markov Model for hard-point detection.
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Asano, Katsuaki, and Masaaki Hayashida. "Blazar Spectra with Hard-sphere-like Acceleration of Electrons." Astrophysical Journal 861, no. 1 (June 28, 2018): 31. http://dx.doi.org/10.3847/1538-4357/aac82a.

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Koylu, Hakan, and Ali Cinar. "Development of control algorithm for ABS–suspension integration to reduce rotational acceleration oscillations of wheel." Transactions of the Institute of Measurement and Control 40, no. 3 (November 13, 2016): 1018–34. http://dx.doi.org/10.1177/0142331216677318.

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In this study, we aimed to obtain smoother wheel rotational acceleration during braking with an activated anti-lock brake system (ABS). This produces effective and easily controlled rotational acceleration of a wheel by an ABS control unit. For this, the wheel load is changed by considering the interaction between the brake pressure change rates and rotational acceleration of the wheel. This is provided by means of the control strategy developed in this study. The rules of the control strategy are based on ABS test results. These tests are conducted with soft, medium-hard and hard dampers on wet and slippery road surfaces. Therefore, the control strategy changes the wheel load by setting the damper stage according to agreement between brake pressure and wheel rotational acceleration. Here, the control strategy constantly applies the damping force of the damper providing the shortest braking distance under wet or slippery road conditions. All results show that the control strategy considerably improves wheel rotational acceleration oscillations during braking with an activated ABS.
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CROMARTY, S. I., J. S. COBB, and G. KASS-SIMON. "Behavioral Analysis of the Escape Response in the Juvenile Lobster Homarus Americanus Over the Molt Cycle." Journal of Experimental Biology 158, no. 1 (July 1, 1991): 565–81. http://dx.doi.org/10.1242/jeb.158.1.565.

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1. Components of the escape response of the American lobster were compared over the molt cycle. Number of tailflips, frequency, duration and distance were measured. Velocity, acceleration, force and work were computed from the above measurements, using time-lapse video-recordings of escaping lobsters. 2. Soft-shelled postmolt lobsters (stage B) traveled further, spent more time tailflipping and performed a larger number of tailflips than hard-shelled premolt lobsters (stage D). Hard-shelled lobsters had a more forceful initial power swim, achieved a higher overall velocity and acceleration and, therefore, produced more forceful swims with greater energy expenditure (measured by work output) than soft-shelled animals. 3. Among hard-shelled lobsters, velocity, acceleration, force and work fell off markedly in the latter part of their subsequent swims as a consequence of the prolonged duration and reduced frequency of these swims. Soft-shelled lobsters sustained their swimming velocity, acceleration, force and work for their entire subsequent swimming response. 4. There are likely to be large molt-related differences in energy metabolism, endocrinology and nerve and muscle physiology which lead to the observed differences in the escape response.
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Jinzenji, A., T. Sasamoto, K. Aikawa, S. Yoshida, and K. Aruga. "Acceleration feedforward control against rotational disturbance in hard disk drives." IEEE Transactions on Magnetics 37, no. 2 (March 2001): 888–93. http://dx.doi.org/10.1109/20.917637.

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Burdzy, Krzysztof, Mauricio Duarte, Carl-Erik Gauthier, C. Robin Graham, and Jaime San Martin. "Fermi acceleration in rotating drums." Journal of Mathematical Physics 63, no. 6 (June 1, 2022): 062706. http://dx.doi.org/10.1063/5.0082981.

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Consider hard balls in a bounded rotating drum. If there is no gravitation, then there is no Fermi acceleration, i.e., the energy of the balls remains bounded forever. If there is gravitation, Fermi acceleration may arise. A number of explicit formulas for the system without gravitation are given. Some of these are based on an explicit realization, which we derive, of the well-known microcanonical ensemble measure.
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Benz, Arnold O., Paolo C. Grigis, and Marco Battaglia. "Electron acceleration in solar flares: observations versus numerical simulations." Proceedings of the International Astronomical Union 2, no. 14 (August 2006): 87. http://dx.doi.org/10.1017/s1743921307009908.

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Books on the topic "Hard-acceleration"

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1958-, Ferrando Philippe, and Rodriguez Jérôme, eds. Simbol-X: Focusing on the hard x-ray universe : 2nd International Simbol-X Symposium, Paris, France, 2-5 December 2008. Melville, N.Y: American Institute of Physics, 2009.

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Batss, David. Hard Acceleration. Okir Publishing Inc., 2018.

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Batts, David. Hard Acceleration. Okir Publishing Inc., 2018.

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Batts, David, and Ta'Lishia Batts. Hard Acceleration. Archway Publishing, 2016.

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United States. National Aeronautics and Space Administration., ed. Correlative analysis of hard and soft X-ray emissions in solar flares using CGRO/BATSE and YOHKOH: Final report, NASS-32791. [Washington, DC: National Aeronautics and Space Administration, 1996.

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Book chapters on the topic "Hard-acceleration"

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Kosugi, Takeo. "Hard X-Ray Solar Flares Observed by Yohkoh and Particle Acceleration." In Physics of Solar and Stellar Coronae: G.S. Vaiana Memorial Symposium, 131–38. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1964-1_10.

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Lin, R. P. "Particle Acceleration by the Sun: Electrons, Hard X-Rays/Gamma-Rays." In Solar Dynamics and Its Effects on the Heliosphere and Earth, 233–48. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-69532-7_16.

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Benz, A. O., and S. R. Kane. "Electron Acceleration in Flares Inferred from Radio and Hard X-Ray Emissions." In Radio Continua During Solar Flares, 179–85. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4710-8_20.

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Trottet, G. "Relative Timing of Hard X-Rays and Radio Emissions During the Different Phases of Solar Flares: Consequences for the Electron Acceleration." In Radio Continua During Solar Flares, 145–63. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4710-8_16.

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Vilmer, N. "Hard X-ray Emission Processes in Solar Flares." In Particle Acceleration and Trapping in Solar Flares, 207–23. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3999-8_20.

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Klein, K. L., M. Pick, A. Magun, and B. R. Dennis. "Hard X-ray and Radio Emission at the Onset of Great Solar Flares." In Particle Acceleration and Trapping in Solar Flares, 225–33. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3999-8_21.

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Correia, E., and P. Kaufmann. "Repetition Rates of Fast Pulses in a Solar Burst Observed at Mm-Waves and Hard X-rays." In Particle Acceleration and Trapping in Solar Flares, 143–54. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3999-8_13.

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Osama, Muhammad, and Anton Wijs. "GPU Acceleration of Bounded Model Checking with ParaFROST." In Computer Aided Verification, 447–60. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81688-9_21.

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AbstractThe effective parallelisation of Bounded Model Checking is challenging, due to SAT and SMT solving being hard to parallelise. We present ParaFROST, which is the first tool to employ a graphics processor to accelerate BMC, in particular the simplification of SAT formulas before and repeatedly during the solving, known as pre- and inprocessing. The solving itself is performed by a single CPU thread. We explain the design of the tool, the data structures, and the memory management, the latter having been particularly designed to handle SAT formulas typically generated for BMC, i.e., that are large, with many redundant variables. Furthermore, the solver can make multiple decisions simultaneously. We discuss experimental results, having applied ParaFROST on programs from the Core C99 package of Amazon Web Services.
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Petrosian, V. "Looptop and footpoint impulsive hard X-rays and stochastic electron acceleration in flares." In Multi-wavelength Observations of Coronal Structure and Dynamics, Yohkoh 10th Anniversary Meeting, 361–66. Elsevier, 2002. http://dx.doi.org/10.1016/s0964-2749(02)80095-6.

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Finn, Chester E., and Andrew E. Scanlan. "Early Days." In Learning in the Fast Lane, 9–20. Princeton University Press, 2019. http://dx.doi.org/10.23943/princeton/9780691178721.003.0002.

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This chapter discusses the earliest days of Advanced Placement (AP) and the growing pains of its first two decades. At the outset, AP was explicitly intended for the strongest students at top high schools, those who “already had the luxury of being bound for prestigious colleges and universities, room to excel and an inducement to continue to work hard.” However, while the lore surrounding the program's birth associates it mostly with eastern prep schools, in fact the “pioneer schools” were a mix of independent and public institutions, the latter mostly located in upper-middle-class suburbs of major cities in the East and Midwest. Acceleration and degree credit were not the only appeal—or benefit—of AP. Many students were “content with the enrichment that the AP courses had provided” and “never applied for either AP credit or advancement in college.” For all the excitement and expansion, however, after two decades AP remained predominantly a boon for relatively privileged kids.
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Conference papers on the topic "Hard-acceleration"

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Hao, Huiyan, and Hui Zhao. "Hard target penetration acceleration signals Time-frequency Analysis." In 2011 International Conference on Electronics and Optoelectronics (ICEOE). IEEE, 2011. http://dx.doi.org/10.1109/iceoe.2011.6013413.

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Vink, Jacco, Jéro^me Rodriguez, and Phillippe Ferrando. "Hard X-ray Emission and Efficient Particle Acceleration by Supernova Remnants." In SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE: Proceedings of the 2nd International Simbol-X Symposium. AIP, 2009. http://dx.doi.org/10.1063/1.3149426.

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FIROOZRAI, A., I. STIHARU, and R. SEDAGHATI. "DEVELOPMENT OF HARD LANDING DIAGNOSIS SYSTEM BASED ON ACCELERATION SENSING USING MEMS." In Proceedings of the 2006 International Conference (CDIC '06). WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812770097_0026.

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Endo, Hiroyuki, and Hiroshi Fujimoto. "Short-span seeking control of hard disk drive with learning based PTC in acceleration and deceleration period." In IECON 2009 - 35th Annual Conference of IEEE Industrial Electronics (IECON). IEEE, 2009. http://dx.doi.org/10.1109/iecon.2009.5415306.

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Struminsky, A., A. Sadovski, and I. Grigorieva. "CME acceleration in impulsive (X6.9 09.08.2011) and gradual (M3.7 07.03.2011) solar flares." In ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021. Crossref, 2022. http://dx.doi.org/10.51194/vak2021.2022.1.1.132.

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We analyze solar events associated with flares: gradual — M3.7 on March 7, 2011 and impulsive — X6.9 on August 9, 2011.These flares were accompanied by hard X-ray (HXR), microwave (MW) and > 100 MeV gamma radiation, fast coronalmass ejection (CME). Estimates of the magnitude and duration of acceleration for CME were obtained from the conditionof stitching the assumed uniformly accelerated motion and the observed uniform motion. These estimates indicate that theCME should have been accelerated significantly longer than the estimated minimum time, at least more than 30 min. Theobtained mean values and duration of CME acceleration do not contradict CME acceleration in two phases— impulsive andprolong. The largest bursts of HXR and MW radiation were observed both during the CME impulsive acceleration (X6.9flare on August 9, 2011), and after it (M3.7 flare on March 7, 2011). This shows that the acceleration processes of chargedparticles in flares do not depend on the magnitude of the CME acceleration. The average CME velocity deduced from theSOHO/LASCO observations at 20R ⊙ in the high corona 2034 km/s on March 7, 2011 and 1506 km/s on August 9, 2011suggests that a residual decelerating force acting on CME on August 9, 2011 was larger.
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Jayson, Eric M., James Murphy, Paul W. Smith, and Frank E. Talke. "Shock Test Modeling of a Hard Disk Drive Using Hypermesh and LS-Dyna." In STLE/ASME 2001 International Joint Tribology Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/trib-nano2001-112.

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Abstract A finite element model of a hard disk drive (HDD) is developed for simulating shock testing and head slap. Individual components of the disk drive are modeled using Hypermesh, a commercially available mesh generator. The following components are modeled: the base plate, the impact surface, the actuator arm, the suspension arm, the head gimbal assembly (HGA) and the disk. The boundary conditions and contact surfaces are defined in Hypermesh [1] prior to importing them to the solver, LS-Dyna [2], for the transient finite element solution. The solution calculates displacement, velocity, acceleration and stress at every time step.
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Tanner, Neal A., and Gu¨nter Niemeyer. "High Frequency Acceleration Feedback in Wave Variable Telerobotics." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81606.

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The human hand is very sensitive to the high frequency accelerations produced by tool contact with a hard object, yet most time delayed telerobots neglect this feedback band entirely in order to achieve stability. We present a control architecture that both incorporates this important information and provides the ability to scale and shape it independently of the low frequency force feedback. Leveraging the clean power flows afforded by wave variables, this augmented controller preserves the passivity of any environment that it renders to the user but is not subject to the limitations of being passive itself. This architecture guarantees stability in the presence of communication delay while achieving a level of feedback not possible with a passive controller. We show experimentally that this feedback augmentation and shaping can present a high frequency acceleration profile to the user’s hand that is similar to that experienced by the slave end effector. We anticipate that these natural haptic cues will make teleoperative systems easier to use and thus more widely applicable.
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Kharisov, Evgeny. "Improving Stability Margins of Rotational Vibration Feed-Forward Compensator." In ASME 2014 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/isps2014-6951.

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This work focuses on stability analysis and design for rotational vibration feed-forward (RVFF) compensator for hard disk drive (HDD) servo control system. We consider the effect of the coupling phenomenon between the voice coil motor (VCM) control current and the rotational vibration acceleration measurements. The coupling creates an undesirable feedback loop, which affects stability of the RVFF compensator as well as it limits the achievable system performance. In this work we present a method for the parasitic coupling mitigation. This method uses self-induced coupling vibration prediction to remove the coupling signal component from the rotational vibration (RV) acceleration measurements. We consider linear time invariant coupling estimator, which is more appealing for analysis in frequency domain, as well as its nonlinear adaptive version, which is more suitable for robust operation in uncertain environment.
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Miles, Paul, and Mark Archibald. "Experimental Investigation of Bicycle Frame FEA Models." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62255.

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This study experimentally investigated pedal cycle frame loads and verified analytical load cases applied to vehicle design. The experimental results were compared with a Finite Element Analysis (FEA) model. The weight of the rider on the seat, road induced loads and vibrations, and the force the rider exerts on the pedals affect the stress state of the frame. Strain gauges were applied to two different frame models. Four different locations were tested on a monotube long-wheel base (LWB) recumbent frame and six locations on a standard upright Schwinn. The stress state was calculated from the raw strain data. Depending on the gauge being used, the results either indicated the von Mises stress or simply the axial stress. The different loading conditions tested were as follows: static, steady pedaling on smooth, mid-grade, and rough pavement, and hard acceleration on level ground and uphill. The static and hard acceleration cases were directly compared to the FEA model. The experimental results were comparable to the FEA analysis. The complexity of the load case, coupled with unknown actual loads, explains the larger differences between FEA and experimental results. Based on experimental results, the FEA model was refined, improving the agreement between model and experiment. The stress states of a bicycle frame were successfully found experimentally, being confirmed by multiple runs under each loading condition. Based on the agreement between the two methods, the use of FEA load cases to predict stresses in pedal cycle frames was verified.
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Muñoz Osorio, Juan D., Mario D. Fiore, and Felix Allmendinger. "Operational Space Formulation Under Joint Constraints." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-86058.

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In this paper, the problem of including hard constraints in the stack of tasks for torque-controlled serial manipulators is treated. The classic potential field approach is studied and a novel implementation of it is proposed. This implementation reduces the kinetic energy in the proximity of joint limits. Furthermore, a novel approach is proposed in order to include not only joint positions but also joint velocities and acceleration limits. This approach is called “Saturation in Joint Space” (SJS). The algorithm proceeds by creating a task with the highest priority in a stack of tasks scheme. This high priority task saturates the acceleration of the joints that would exceed their motion limits. The methods are tested and compared in simulation for the KUKA LBR iiwa. The SJS approach presents smoother behaviour near to the joint limits, while a Cartesian trajectory is traced. Experiments are performed to test the efficiency of this method in a real environment and under interaction with a human. The on-line saturation of the joint acceleration generates a friendly behaviour with the human even when he pushes the robot towards its limits.
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