@article{ 11589_5997, author = { Alò Roberta and Bottiglione Francesco and Mantriota Giacomo }, title = {An Innovative Design of Artificial Knee Joint Actuator with Energy Recovery Capabilities}, year = {2016}, journal = {JOURNAL OF MECHANISMS AND ROBOTICS}, volume = {8}, abstract = {The actuation systems of lower limbs exoskeletons have been extensively investigated and, presently, a great effort is aimed at reducing the weight and improving the efficiency, thus increasing the operating range for battery-operated devices. In this work, an innovative and more efficient actuation system to power the knee joint is proposed. The key and nonconventional elements of this alternative design are a flywheel and a micro infinitely variable transmission (IVT). This particular powertrain configuration permits to exploit efficiently the dynamics of human locomotion, which offers the possibility to recover energy. By means of simulations of level ground walking and running, it is here demonstrated how storing energy in the flywheel permits to reduce the energy consumption and to downsize the electric motor.}, url = {http://mechanismsrobotics.asmedigitalcollection.asme.org/article.aspx?articleid=2471045}, doi = {10.1115/1.4030056}, } @conference{ 11589_18426, author = { Alò R and Bottiglione F and Mantriota G }, title = {F-IVT Actuation System to Power Artificial Knee Joint}, year = {2015}, volume = {9}, booktitle = {International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering}, abstract = {The efficiency of the actuation system of exoskeletons and active orthoses for lower limbs is a significant aspect of the design of such devices because it affects their efficacy. The F-IVT is an innovative actuation system to power artificial knee joint with energy recovery capabilities. Its key and non-conventional elements are a flywheel that acts as a mechanical energy storage system, and an Infinitely Variable Transmission (IVT). The design of the F-IVT can be optimized for a certain walking condition, resulting in a heavy reduction of both the electric energy consumption and of the electric peak power. In this work, by means of simulations of level ground walking at different speeds, it is demonstrated that the F-IVT is still an advantageous actuator which permits to save energy consumption and to downsize the electric motor even when it does not work in nominal conditions.}, url = {http://waset.org/Publications?p=101}, pages = {744--749} } @article{ 11589_1263, author = { Bottiglione F and Di Mundo R and Soria L and Carbone G }, title = {Wenzel to Cassie Transition in Superhydrophobic Randomly Rough Surfaces}, year = {2015}, journal = {NANOSCIENCE AND NANOTECHNOLOGY LETTERS}, volume = {7}, url = {http://www.ingentaconnect.com/content/asp/nnl/2015/00000007/00000001/art00014?token=0036123060275c277b42573a6747486b343e2c2a796d592f3f3b2c}, doi = {10.1166/nnl.2015.1922}, pages = {74--78} } @article{ 11589_5890, author = { Bottiglione F and Carbone G }, title = {An effective medium approach to predict the apparent contact angle of drops on super-hydrophobic randomly rough surfaces}, year = {2015}, journal = {JOURNAL OF PHYSICS. CONDENSED MATTER}, volume = {27}, doi = {10.1088/0953-8984/27/1/015009}, } @article{ 11589_58165, author = { Di Mundo Rosa and Bottiglione Francesco and Palumbo Fabio and Favia Pietro and Carbone Giuseppe }, title = {Sphere-on-cone microstructures on Teflon surface: Repulsive behavior against impacting water droplets}, year = {2015}, journal = {MATERIALS & DESIGN}, abstract = {Teflon (polytetrafluoroethylene) surface has been modified with a single step oxygen-fed plasma process resulting in the formation of peculiar “sphere-on-cone” micro-scale relieves. Though presenting some irregularity and random distribution, surfaces with a steep variation of topography can be obtained by properly tuning plasma process parameters. We show that, though exhibiting similar superhydrophobic properties in terms of water contact angle, the ability to withstand vertically impacting water droplets falling at medium/high impacting speeds can be sensitively different. In particular, high repulsive properties characterize surfaces with denser and smaller relieves. In the other cases the occurrence of pinning events results in longer time-of-contact and a shorter time-of-flight of the drop. Interestingly, the impact pressure values at which pinning transitions have been observed are consistent with critical pressures for penetration calculated by modeling the surface as an array of spheres. When critical pressure is exceeded, and water penetration is expected, reversible or non reversible pinning can be explained on the basis of the wetting/de-wetting cycle within the sphere-on-cone's layer.}, url = {http://www.sciencedirect.com/science/article/pii/S0264127515308352}, doi = {10.1016/j.matdes.2015.11.094}, } @article{ 11589_58440, author = { Bottiglione F and Carbone G and Persson B N J }, title = {Fluid contact angle on solid surfaces: Role of multiscale surface roughness}, year = {2015}, journal = {THE JOURNAL OF CHEMICAL PHYSICS}, volume = {143}, keywords = {Physics and Astronomy (all); Physical and Theoretical Chemistry}, url = {http://scitation.aip.org/content/aip/journal/jcp}, doi = {10.1063/1.4932104}, } @conference{ 11589_25339, author = { Rosa Di Mundo and Francesco Bottiglione and Soria L and Giuseppe Carbone }, title = {Wenzel roughness factor as key parameter for robust superhydrophobicity in randomly rough surfaces: dynamic wetting confirms prediction}, year = {2014}, booktitle = {Superhydrophobicity, bubble stability, and heterogeneous nucleation}, url = {http://www.dima.uniroma1.it/dima/superhydrophobicity2014} } @conference{ 11589_22374, author = { Rosa Di Mundo and Francesco Bottiglione and Soria L and Giuseppe Carbone }, title = {ASSESSING FAKIR STATE ROBUSTNESS OF SUPERHYDROPHOBIC PLASMA GENERATED RANDOMLY NANO-ROUGH SURFACES}, year = {2014}, booktitle = {MMT-2014, The Eighth International Conference on Materials Technologies and Modeling}, url = {http://www.ariel.ac.il/sites/conf/mmt/mmt-2014/mmt-2014.htm} } @conference{ 11589_23527, author = { Carbone G and Galietti U and Demelio G and Afferrante L and Bottiglione F and Di Mundo R and Menga N }, title = {Biomimetics and Tribology of Micro- and Nano Structured Surfaces}, year = {2014}, volume = {Track B}, booktitle = {Atti del "1st WORKSHOP on the State of the art and Challenges Of Research Efforts @ POLIBA"} } @article{ 11589_3195, author = { Bottiglione F and Contursi T and Gentile A and Mantriota G }, title = {The Fuel Economy of Hybrid Buses: The Role of Ancillaries in Real Urban Driving}, year = {2014}, journal = {ENERGIES}, volume = {7}, doi = {10.3390/en7074202}, pages = {4202--4220} } @article{ 11589_1587, author = { Bottiglione F and De Pinto S and Mantriota G }, title = {Infinitely Variable Transmissions in neutral gear: Torque ratio and power re-circulation}, year = {2014}, journal = {MECHANISM AND MACHINE THEORY}, volume = {74}, pages = {285--298} } @article{ 11589_7975, author = { Di Mundo R and Bottiglione F and Carbone G }, title = {Cassie state robustness of plasma generated randomly nano-roughsurfaces}, year = {2014}, journal = {APPLIED SURFACE SCIENCE}, volume = {316}, abstract = {Superhydrophobic surfaces are effective in practical applications provided they are “robust superhy-drophobic”, i.e. able to retain the Cassie state, i.e. with water suspended onto the surface protrusions,even under severe conditions (high pressure, vibrations, high speed impact, etc.). We show that for ran-domly rough surfaces, given the Young angle, Cassie states are robust when a threshold value of theWenzel roughness factor, rW, is exceeded. In particular, superhydrophobic nano-textured surfaces havebeen generated by self-masked plasma etching. In view of their random roughness, topography features,acquired by Atomic Force Microscopy, have been statistically analyzed in order to gain information onstatistical parameters such as power spectral density, fractal dimension and Wenzel roughness factor(rW), which has been used to assess Cassie state robustness. Results indicate that randomly rough sur-faces produced by plasma at high power or long treatment duration, which are also fractal self-affine,have a rWhigher than the theoretical threshold, thus for them a robust superhydrophobicity is predicted.In agreement with this, under dynamic wetting conditionson these surfaces the most pronounced super-hydrophobic character has been appreciated: they show the lowest contact angle hysteresis and resultin the sharpest bouncing when hit by drops at high impact velocity.}, doi = {/10.1016/j.apsusc.2014.07.184}, pages = {324--332} } @article{ 11589_3133, author = { De Pinto S and Bottiglione F and Mantriota G and Sorniotti A }, title = {Energy Consumption of a Battery Electric Vehicle with Infinitely Variable Transmission}, year = {2014}, journal = {ENERGIES}, volume = {7}, doi = {10.3390/en7128317}, pages = {8317--8337} } @conference{ 11589_23353, author = { Pappalettere C and De Palma P and Pascazio G and De Tullio M and Camporeale S and Dambrosio L and Fortunato B and Torresi M and Fornarelli F and Carbone G and Afferrante L and Bottiglione F and Mantriota G and Foglia MM and Demelio G and Ciavarella M and Lamberti L and Boccaccio A and Ludovico AD and Csmpanelli SL and De Filippis LAC and Tricarico L and Palumbo G and Sorgente D and Scintilla LD and Galantucci LM and Percoco G and Lavecchia F and Casavola C and Naso N and Lino P and Maione G and Stasi S and Turchiano B and Cupertino F }, title = {Advanced technologies for reduction of polluting emissions, fuel consumption and operating costs of Heavy Duty engines, INNOVHEAD}, year = {2014}, volume = {Track A}, booktitle = {Atti del "1st WORKSHOP on the State of the art and Challenges Of Research Efforts @ POLIBA"} } @conference{ 11589_22460, author = { Afferrante L and Bottiglione F and Pierro E and Carbone G }, title = {A bio-inspired micro-structured surface with anisotropic adhesion}, year = {2013}, booktitle = {Proceedings of the 5th World Tribology Congress, Torino, Italy, September, 8-13, 2013} } @conference{ 11589_21826, author = { Bottiglione F and Afferrante L and Pierro E and Carbone G }, title = {Tuning roughness to design robust superhydrophobic surfaces}, year = {2013}, booktitle = {Proceedings of the 5th World Tribology Congress, Torino, Italy, September, 8-13, 2013} } @conference{ 11589_23439, author = { Pierro E and Carbone G and Afferrante L and Bottiglione F }, title = {Adhesive performance of mushroom-shaped micro-pillars with interfacial micro-bubbles of air}, year = {2013}, booktitle = {Proceedings of the 5th World Tribology Congress, Torino, Italy, September, 8-13, 2013} } @article{ 11589_52196, author = { Bottiglione F and Carbone G }, title = {Role of statistical properties of randomly rough surfaces in controlling superhydrophobicity}, year = {2013}, journal = {LANGMUIR}, doi = {10.1021/la304072p}, pages = {599--609} } @article{ 11589_8290, author = { Bottiglione Francesco and Carbone Giuseppe and Novellis Leonardo De and Mangialardi Luigi and Mantriota Giacomo }, title = {Mechanical Hybrid KERS Based on Toroidal Traction Drives: An Example of Smart Tribological Design to Improve Terrestrial Vehicle Performance}, year = {2013}, journal = {ADVANCES IN TRIBOLOGY}, volume = {2013}, abstract = {We analyse in terms of efficiency and traction capabilities a recently patented traction drive, referred to as the double roller fulltoroidal. variator (DFTV). We compare its performance with the single roller full-toroidal variator (SFTV) and the single roller. half-toroidal variator (SHTV). Modeling of these variators involves challenging tribological issues; the traction and efficiency. performances depend on tribological phenomena occurring at the interface between rollers and disks, where the lubricant. undergoes very severe elastohydrodynamic lubrication regimes. Interestingly, the DFTV shows an improvement of the mechanical. efficiency over a wide range of transmission ratios and in particular at the unit speed ratio as in such conditions in which the DFTV. allows for zero-spin, thus strongly enhancing its traction capabilities.The very highmechanical efficiency and traction performances. of the DFTV are exploited to investigate the performance of a flywheel-based Kinetic Energy Recovery System (KERS), where. the efficiency of the variator plays an important role in determining the overall energy recovery performance. The energy boost. capabilities and the round-trip efficiency are calculated for the three different variators considered in this study.The results suggest. that the energy recovery potential of the mechanical KERS can be improved with a proper choice of the variator.}, keywords = {Mechanical transmission; Tribology}, url = {http://www.hindawi.com/journals/at/2013/918387/}, doi = {10.1155/2013/918387}, pages = {1--9} } @article{ 11589_52287, author = { Bottiglione F and Mantriota G }, title = {Effect of the Ratio Spread of CVU in Automotive Kinetic Energy Recovery Systems}, year = {2013}, journal = {JOURNAL OF MECHANICAL DESIGN}, doi = {10.1115/1.4024121}, }