A5078544838- Vehicle Dynamics and Control Systems
- Mechanical Engineering and Vibrations Research
- Numerical methods in engineering
- Gear and Bearing Dynamics Analysis
- Soil Mechanics and Vehicle Dynamics
- Tribology and Lubrication Engineering
- Electromagnetic Scattering and Analysis
- Electromagnetic Simulation and Numerical Methods
- Advanced machining processes and optimization
- Real-time simulation and control systems
- Mechanics and Biomechanics Studies
- Dynamics and Control of Mechanical Systems
- Hydraulic and Pneumatic Systems
- Iterative Learning Control Systems
- Advanced Measurement and Metrology Techniques
- Advanced Numerical Analysis Techniques
- Advanced Numerical Methods in Computational Mathematics
- Vibration and Dynamic Analysis
- Adhesion, Friction, and Surface Interactions
- Plant Surface Properties and Treatments
- Electric and Hybrid Vehicle Technologies
- Fatigue and fracture mechanics
- Acoustic Wave Phenomena Research
- Engineering Technology and Methodologies
- Modeling and Simulation Systems
University of Pisa
2014-2024
The Ohio State University
2011
University of Siena
1994-2001
The limiting process that leads to the formulation of hypersingular boundary integral equations is first discussed in detail. It shown with kernels are perfectly meaningful even at non-smooth points, and special interpretations integrals involved not necessary. Careful analysis has also strong relevance for development an appropriate numerical algorithm. In second part, a new general method evaluation surface element (BEM) presented. proposed can be systematically applied any BEM analysis,...
This paper presents a new general method for the direct evaluation of Cauchy principal value integrals in several dimensions, which is an issue major concern any boundary element analysis applied mechanics. It shown that original integral can be transformed into element-by-element sum regular integrals, each one expressed terms intrinsic (local) coordinates. The actual computation performed by standard quadrature formulae and easily included existing computer code. numerical results...
Abstract This paper presents a new method for the direct computation of strongly singular integrals existing in Cauchy principal value sense. It can be usefully applied solution by boundary element many different problems. Initially, some considerations are provided order to summarize state‐of‐the‐art on this issue. Then features proposed reported. The procedure allows calculation with first‐order singularity and it is applicable even advanced methods employing high‐order elements. requires...
Systematic optimization of the tooth contact pattern under load is an open problem in design spiral bevel and hypoid gears. In order to enhance its shape position, gear engineers have been assisted by numerical tools based on trial-and-error approaches, and/or they relying expertise skilled operators. The present paper proposes a fully automatic procedure optimize loaded pattern, with advantage eventually reducing time cost. main was split into two identification subproblems: first, identify...
This paper presents a new systematic method for identifying the values of machine-tool settings required to obtain flank form modifications in hypoid gears. The problem is given nonlinear least-squares formulation, and it solved by Levenberg–Marquardt with trust-region strategy. To test method, same ease-off topography was obtained means very different sets settings, including set only kinematic parameters highly redundant 17 parameters. In all cases, goal achieved few iterations, residual...
Microgeometry optimization has become an important phase of gear design that can remarkably enhance performance. For spiral bevel and hypoid gears, microgeometry is typically represented by ease-off topography. The optimal shape be defined as the outcome a process where generally conflicting objective functions are simultaneously minimized (or maximized), in presence constraints. This matter naturally lends itself to framed multi-objective problem. paper proposes general algorithmic...
This paper presents an automatic procedure to optimize the loaded tooth contact pattern of face-milled hypoid gears with misalignments varying within prescribed ranges. A two-step approach is proposed solve problem: in first step, pinion microtopography automatically modified bring perturbed patterns (as assembly errors are varied tolerance limits) match a target area while keeping them off edges; second subset machine-tool settings identified obtain required topography modifications. Both...
Abstract In this paper a new approach to the development of posteriori error indicators for direct boundary element method (BEM) is presented. It takes advantage unique opportunity offered by collocation BEM, that possibility obtaining more than one numerical solution from given mesh. Unlike other approaches, indicator introduced in present does not require any explicit evaluation residual approximate solution. order test capability proposed actually control selective mesh refinement...
In this paper, we set out to investigate the performances of some algorithms proposed in gear literature for identifying machine-tool settings required obtain predesigned tooth surface topographies, or needed compensate flank form deviations real teeth. For ease comparison, problem is formulated as a nonlinear least squares problem, and most widely employed are derived special cases. The included analysis (i) one-step methods, (ii) iterative (iii) methods with step control. performance index...
Tooth surface modifications are small, micron-level intentional deviations from perfect involute geometries of spur and helical gears. Such aimed at improving contact pressure distribution, while minimizing the motion transmission error to reduce noise excitations. In actual practice, optimal modification requirements vary with operating torque level, misalignments, manufacturing variance. However, most gear literature has been concerned determining flank form a single design point,...
Autonomous vehicles are undergoing a rapid development thanks to advances in perception, planning and control methods technologies achieved the last two decades. Moreover, lowering costs of sensors computing platforms attracting industrial entities, empowering integration innovative solutions for civilian use. Still, autonomous racing cars has been confined mainly laboratory studies small middle scale vehicles. This paper tackles framework an electric full car, which is absolute novelty...