This paper proposes a heuristic approach for planning the activity of multiple carriers cooperating with the goal of eliminating empty truck trips while maximizing the cost saving resulting from their collaboration. T...
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Electro spun nanofibers of blends of natural and synthetic biodegradable polymers have gained great attention due to their extensive biomedical applications in different fields such as tissue engineering, implant coat...
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The body-machine interfaces (BMIs) map the subjects' movements into the low dimensional control space of external devices to reach assistive and/or rehabilitative goals. This work is a first proof of concept of th...
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ISBN:
(纸本)9781424492695
The body-machine interfaces (BMIs) map the subjects' movements into the low dimensional control space of external devices to reach assistive and/or rehabilitative goals. This work is a first proof of concept of this kind of BMI as tool for rehabilitation after stroke. We designed an exercise to improve the control of selective movements of the pelvis in stroke survivors, increasing the ability to decouple the motion in the sagittal and frontal planes and decreasing compensatory adjustments at the shoulder girdle. A Kinect sensor recorded the movements of the subjects. Subjects played different games by controlling the vertical and horizontal motion of a cursor on a screen with respectively the lateral tilt and the ante/retroversion of their pelvis. We monitored also the degrees of freedom not directly involved in cursor control, thus subjects could complete the task only with a correct posture. Our preliminary results highlight significant improvement not only in cursor control, but also in the Trunk Impairment Scale (TIS) and in the Five Times Sit to Stand Test (5xSST).
Polyelectrolyte capsules based on layer by layer self-assembly show great promise for targeted delivery and smart release of drugs. A critical aspect for their clinical use is the evaluation of the interaction capsule...
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The paper deals with a LV grid-connected microgrid located in the Savona Campus of Genoa University and called Smart Polygeneration Microgrid (SPM). Such microgrid is designed to produce electric and thermal energy by...
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ISBN:
(纸本)9789609999465
The paper deals with a LV grid-connected microgrid located in the Savona Campus of Genoa University and called Smart Polygeneration Microgrid (SPM). Such microgrid is designed to produce electric and thermal energy by means of renewable generation units, cogenerative gas turbines, a storage unit and electric vehicle charging stations. The work focuses its attention on the issue of the microgrid day-ahead power production optimization. Such problem consists in finding the power production profiles for all the dispatchable units in order to optimize a well-defined goal (economical, environmental, etc). This requires to model all the components of the grid in order to define the set of constraints for the optimization procedure. In particular, the way of representing the electric power balance equations plays a crucial role since a trade-off between accuracy and computational efforts is required. Different approaches are presented and tested on the SPM, e.g. complete load flow, modified DC load flow and single bus-bar representation, in order to highlight the peculiarity of the different optimization models obtained and evaluate their impact on computational time, result accuracy and possibility of future experimental validation.
In this paper, a bilevel optimal control scheme is proposed for a smart grid characterized by renewable and traditional power production, bidirectional power flows, dynamic storage systems, and stochastic modeling iss...
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In this paper, a bilevel optimal control scheme is proposed for a smart grid characterized by renewable and traditional power production, bidirectional power flows, dynamic storage systems, and stochastic modeling issues (due to uncertainties in renewables forecasting). In this scheme, the UDM (Upper Decision Maker) views the LDMs (Lower Decision Makers or microgrids) as single nodes. In the statement of the UDM problem, the local control strategies are structurally and parametrically constrained. In this way, it is possible to reduce the runtime necessary to achieve the solution, with respect to an approach in which the LDMs control strategies are not constrained. The architecture has been applied to a specific case study (Savona, Italy), where different test-bed facilities are present.
This paper deals with mixed logical dynamical systems controlled via model predictive schemes. For this class of systems a centralized MPC approach is firstly introduced, in which the finite horizon optimal control pr...
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ISBN:
(纸本)9781479932757
This paper deals with mixed logical dynamical systems controlled via model predictive schemes. For this class of systems a centralized MPC approach is firstly introduced, in which the finite horizon optimal control problem is a mixed-integer quadratic programming problem aiming at minimizing the deviations of the system variables from their equilibrium points. Since the application in real time of these MPC schemes is sometimes limited because of the high computational load necessary to solve the finite horizon optimal control problem, a distributed MPC scheme is proposed, characterized by two different and alternative algorithms. An important application is then introduced to assess the proposed approaches, i.e. ramp metering freeway traffic control. Referring to this applicative case, the two distributed control algorithms are compared, via simulation, with the centralized MPC scheme and with a completely decentralized one.
The definition of a control scheme for freeway traffic systems based on Model Predictive Control (MPC) techniques is the objective of the paper. The basic idea in the proposed approach is to switch between control law...
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ISBN:
(纸本)9781467360890
The definition of a control scheme for freeway traffic systems based on Model Predictive Control (MPC) techniques is the objective of the paper. The basic idea in the proposed approach is to switch between control laws computed offline on the basis of a nominal system model and a standard MPC scheme. Then, an offline computed control law is applied to the system until it maintains a suitable performance. This is verified by evaluating the property of natural robustness of the system by means of time-varying conditions depending on the system state and on the amplitude of exogenous perturbations. If the system behaviour, that is characterized by uncertainties, is evolving far from the nominal one, a classical MPC regulator is applied. In the paper, the control scheme is described and its effectiveness is evaluated through a numerical example.
作者:
Murata, SatoshiKobayashi, SatoshiTohoku University
Graduate School of Engineering Department of Bioengineering and Robotics 6-6-01 Aoba-yama Sendai980-8579 Japan University of Electro-Communications
Graduate School of Informatics and Engineering Department of Communication Engineering and Informatics 1-5-1 Chofugaoka Chofu Tokyo182-8585 Japan
This article discusses a real-time networking infrastructure for a large-scale tactile sensing system to be used with humanoid robots. In such a system, real-time networking issues are of the utmost importance. Stemmi...
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ISBN:
(纸本)9781479969357
This article discusses a real-time networking infrastructure for a large-scale tactile sensing system to be used with humanoid robots. In such a system, real-time networking issues are of the utmost importance. Stemming from previous work, a theoretical model is presented and experimentally validated. Tests show real-time performance in a network of distributed computational nodes, each one in charge of managing part of the tactile system.
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