42 Hits in 6.7 sec

Fundamental Limitations of Control and Filtering in Continuous-Time Systems: An Information-Theoretic Analysis [article]

Neng Wan, Dapeng Li, Naira Hovakimyan
2022 arXiv   pre-print
For the linear systems, we show that total information rate has similar properties as some established trade-offs, e.g., Bode-type integrals and minimum estimation error.  ...  Inequality constraints for the trade-off metric are derived in a general setting and then applied to capture the fundamental limitations of various control and filtering systems subject to linear and nonlinear  ...  Acknowledgements This work was supported by AFOSR and NSF. In this arXiv version, the authors would also like to thank the readers and staff on  ... 
arXiv:2201.00995v2 fatcat:tgh6uijurbbeflio5m3lieoiym

Dual-stage servo systems and vibration compensation in computer hard disk drives

Roberto Horowitz, Yunfeng Li, Kenn Oldham, Stanley Kon, Xinghui Huang
2007 Control Engineering Practice  
The first is the use of high bandwidth dual-stage actuator servo systems to improve the precision and track-following capability of the read/write head positioning control system.  ...  This paper discusses two mechatronic innovations in magnetic hard disk drive servo systems, which may have to be deployed in the near future, in order to sustain the continuing 60% annual increase in storage  ...  Moreover, the approximate solution also provides insight into the physical trade-offs between parameters of the system, and reduces the amount of knowledge needed about the system beforehand.  ... 
doi:10.1016/j.conengprac.2006.09.003 fatcat:pecdup4asjbz3epzzqo45oqjwu

Terahertz Integrated Circuits and Systems for High-Speed Wireless Communications: Challenges and Design Perspectives

Payam Heydari
2021 IEEE Open Journal of Solid-State Circuits  
This paper presents challenges and design perspectives for terahertz (THz) integrated circuits and systems. THz means different things to different people.  ...  This definition is now commonly used by communication theorists, and since this paper is intended for people with a wide variety of expertise in system and circuit design, we have adopted the latter definition  ...  Hamidreza Aghasi and Hedayatullah Maktoomi for their joint collaboration on off-chip antenna design in [103] .  ... 
doi:10.1109/ojsscs.2021.3110748 fatcat:dpwuslznwngkbdfujl6s3mrbdm

Power And Performance Management In Cloud Computing Systems

Marco Guazzone, Cosimo Anglano
2012 Zenodo  
In this thesis, we propose a framework to automatically manage computing resources of cloud infrastructures in order to simultaneously achieve suitable QoS levels and to reduce as much as possible the  ...  Unfortunately, the minimization of QoS violations and, at the same time, the reduction of energy consumption is a conflicting and challenging problem.  ...  Usually, when considering the bias-variance reduction problem, one has to seek a good trade-off between flexibility (i.e., if the model structure is "large" enough to cover the true system) and parsimony  ... 
doi:10.5281/zenodo.13170 fatcat:xyizyhe4bjbfddkhz7dbupyiau

Dynamic analysis and control of mirror segment actuators for the European Extremely Large Telescope

Gert Witvoet, Remco den Breeje, Jan Nijenhuis, René Hazelebach, Niek Doelman
2015 Journal of Astronomical Telescopes Instruments and Systems  
Next, feedback controllers for both the fine and the coarse stage have been designed and implemented.  ...  understanding of the dynamic behavior of the system.  ...  Fine Stage Controller Design To make proper controller design trade-offs, an open-loop power spectral density (PSD) plot of the error is often very useful.  ... 
doi:10.1117/1.jatis.1.1.019003 fatcat:gcffcacsazccnjmdmzcbaqsimm

2013 Index IEEE Transactions on Automatic Control Vol. 58

2013 IEEE Transactions on Automatic Control  
., and Shroff, N. B  ...  ., +, TAC July 2013 1696-1706 Integral equations Bode-like Integral for Continuous-Time Closed-Loop Systems in the Pres- ence of Limited Information.  ...  ., +, TAC Nov. 2013 2985-2990 Bode-like Integral for Continuous-Time Closed-Loop Systems in the Pres- ence of Limited Information.  ... 
doi:10.1109/tac.2013.2295962 fatcat:3zpqog4r4nhoxgo4vodx4sj3l4

Design limits and dynamic policy analysis

William A. Brock, Steven N. Durlauf, Giacomo Rondina
2013 Journal of Economic Dynamics and Control  
Tradeoffs of this type are known in the control literature as design limits. Design limits are important in understanding the full range of effects of stabilization policies.  ...  This paper characterizes the frequency domain properties of feedback control rules in linear systems in order to better understand how different rules affect outcomes frequency by frequency.  ...  We characterize Bode integral-type results for each type of model. Section 3 moves beyond Bode integral constraints to a broader consideration of how design limit occur in MIMO and SIMO systems.  ... 
doi:10.1016/j.jedc.2013.07.008 fatcat:xbfh36245vhwbixty3gtpler2y

Plasma Magnetic Control in Tokamak Devices

Gianmaria De Tommasi
2018 Journal of fusion energy  
In tokamak experimental reactors, the magnetic control system is one of the main plasma control systems that is required, together with the density control, since the very beginning, even before first  ...  Indeed, the magnetic control drives the current in the external poloidal circuits in order to first achieve the breakdown conditions and, after plasma formation, to track the desired plasma current, shape  ...  Moreover, the feedback term e R PF I PF ðtÞ is equivalent to an integral action or, in other word, it allows to treat any coil as a supercondutive one. 7 The Bode diagrams of the closed loop system designed  ... 
doi:10.1007/s10894-018-0162-5 fatcat:7mly7m5qjnhi5f6ztyicqsquaq

5G-Enabled Tactile Internet

Meryem Simsek, Adnan Aijaz, Mischa Dohler, Joachim Sachs, Gerhard Fettweis
2016 IEEE Journal on Selected Areas in Communications  
An integral part of this is to be able to transmit touch in perceived real-time, which is enabled by suitable robotics and haptics equipment at the edges, along with an unprecedented communications network  ...  This paper presents the most important technology concepts which lay at the intersection of the larger Tactile Internet and the emerging 5G systems.  ...  That work was also partially funded by the European Commission H2020 5GPP projects NORMA and VirtuWind.  ... 
doi:10.1109/jsac.2016.2525398 fatcat:pwt5ne4wsnc77ps3uel4ujkgwu

A Planning and Control Framework for Humanoid Systems: Robust, Optimal, and Real-time Performance [article]

Ye Zhao
2017 arXiv   pre-print
We pursue a detailed analysis of the distributed controllers where damping feedback effort is executed in proximity to the control plant, and stiffness feedback effort is implemented in a latency-prone  ...  Humanoid robots are increasingly demanded to operate in interactive and human-surrounded environments while achieving sophisticated locomotion and manipulation tasks.  ...  A trade-off between inner torque gains and outer impedance gains is observed.  ... 
arXiv:1701.05929v1 fatcat:tqsr6sss3jeudcklibi2x6tjmy

Frequency Response Estimation for Multiple Aircraft Control Loops Using Orthogonal Phase-Optimized Multisine Inputs

Jared A. Grauer
2022 Processes  
The latest advances made at NASA for simultaneous excitation in multiple axes and the identification of frequency responses for aircraft flight systems are discussed in this paper.  ...  The results indicate that this approach can significantly shorten the duration of flight tests and Monte Carlo simulations to save time and costs, and can produce results in real time.  ...  The linear models for the X-59 airplane used in this paper were generated by David Cox, LaRC Dynamic Systems and Control Branch.  ... 
doi:10.3390/pr10040619 doaj:685c8a726d6c4ee09e5aa3cac652c625 fatcat:xhpukqnv6bezxahjkvsdfah7i4

Certifying Unstability of Switched Systems Using Sum of Squares Programming

Benoît Legat, Pablo Parrilo, Raphaël Jungers
2020 SIAM Journal of Control and Optimization  
Results The results include rigorous analysis of a limit cycle describing the whole dynamics of the biochemical oscillator.  ...  From an analysis and controller design point of view, it is known that GSPT and its adaptation to control systems [4], provide mathematical tools to understand the dynamics, and design controllers from  ...  ., and Heemels, W.P.M.H. (2015). Switching data-processing methods for feedback control: Breaking the speed versus accuracy trade-off.  ... 
doi:10.1137/18m1173460 fatcat:ytlzbwk7vbampbuyo6snenz33m

Fundamental Limitations of Control and Filtering in Continuous-Time Systems: An Information-Theoretic Analysis [article]

Neng Wan, Dapeng Li, Naira Hovakimyan
For the control and filtering systems in the linear case, the general trade-offs serve as the performance limits related to the characteristics of plant models.  ...  Fundamental constraints on the trade-off metrics are derived and used to capture the limitations of continuous-time control and filtering systems.  ...  Acknowledgements This work was supported by AFOSR and NSF. In this arXiv version, the authors would also like to thank the readers and staff on  ... 
doi:10.48550/arxiv.2201.00995 fatcat:qqjwzjmtxfd3zbfxfe5x76wsnq

Comparative Account of Robust H∞ Techniques for Missile Autopilot Design

PSR Srinivasa Sastry, SK Ray, G. Mallikarjuna Rao, S. K. Biswas
2019 International Journal of Image Graphics and Signal Processing  
From the literature, a variety of techniques is reported in the last three decades with specific merits and demerits, which, when applied to multiple flight control scenarios, showing trade off in terms  ...  A comparative account of modern control methods is presented on the basis of system performance and robustness, which will be helpful in the selection of the appropriate design method for specific application  ...  Mixed sensitivity two degree freedom model exploit independent tuning process for performance and stability, exploring the combinations of robustness and performance trade off from the entire system point  ... 
doi:10.5815/ijigsp.2019.04.03 fatcat:isu3hu3qlvgevpl246aq7d2yq4

To the Editor

Jeremy I Simon, Harla K O'Donnell, Zachary Broyer
2017 Pain medicine (Malden, Mass.)  
This research will also investigate how location information from a GPS receiver can be used and efficiently incorporated into sosMesh to provide more accurate and faster localisation of the trapped person  ...  Acknowledgments The authors thank colleagues in the Simulation and Visualization Group, Department of Computer Science, University of Hull for valuable discussions and technical assistance.  ...  We usually set δ = 3 4 to achieve a trade-off between performance and complexity [6] . From the definition (2), the lattice L(H) can have infinitely many different bases other thanH.  ... 
doi:10.1093/pm/pnx150 pmid:29016898 fatcat:pao75lxgbvg3hkyhod262f5ebe
« Previous Showing results 1 — 15 out of 42 results