Elvio Bonisoli

Elvio Bonisoli
Politecnico di Torino | polito · DIMEAS - Department of Mechanical and Aerospace

MSc, PhD, Prof.

About

131
Publications
16,527
Reads
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849
Citations
Citations since 2017
47 Research Items
531 Citations
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Additional affiliations
October 2016 - present
Politecnico di Torino
Position
  • Professor (Associate)
March 2008 - September 2016
Politecnico di Torino
Position
  • Professor (Assistant)

Publications

Publications (131)
Chapter
In bicycles, one of the components which mostly influences the global system dynamics is the wheel-tyre subsystem. In this paper, the modal behaviour of a bike spoke wheel is numerically and experimentally investigated focusing on the characterisation of the spoke pretension effect, role of boundary conditions and parameter uncertainties.A linearis...
Chapter
This paper addresses the analysis of torsional dynamic behaviour in a magnetic transmission, where the torque is transferred in a contactless way between two coaxial rotors with permanent magnets through the interaction with a modulator element holding ferromagnetic poles. This transmission device is called planetary magnetic gear (PMG), due to its...
Article
In multibody system models, body flexibility is introduced when the structure compliance is not negligible for an accurate description of the system behaviour. Flexible multibody systems provide a more detailed description of system kinematics and dynamics, introducing the effects of the body dynamics deformations. The influence of component higher...
Chapter
This work presents the design optimization of the HANDSHAKE multibody model, a full-scale biped-wheeled exoskeleton, conceived in previous works. The ambition of the HANDSHAKE biped-wheeled exoskeleton is to give new locomotion perspectives at people with reduced mobility or people with complete paralysis of the lower body. In this paper, a critica...
Chapter
The paper presents the experimental tests of a manual wheelchair, named Handwheelchair.Q, that utilizes an innovative propulsion system composed of a system of cables and pulleys and a gesture inspired by the rowing motion. This prototype has been developed in order to increase the autonomy of the wheelchair users and to facilitate the practice of...
Article
Mechanical differentials are essential drivetrain components of automobiles and other wheeled vehicles, allowing the outer drive wheel to rotate faster than the inner drive wheel during turns. This paper presents a comprehensive description of a novel and recently patented alternative based on magnetic gears, which achieves the same functionality w...
Conference Paper
Taekwondo is a martial art recognized as an Olympic sport since 2000. During competitions, athletes wear the typical protective garment composed by head, arms, hands, trunk, genitals, legs, foot protectors. The trunk protector has been developed with several modifications during history adding electronic devices to help referees in the points’ assi...
Article
Full-text available
Nowadays, Underactuated Mechanical Systems (UMS) remain an interesting research field for control laws development. This work deals with the design of an adaptive controller on the basis of Sliding Mode Control (SMC) and the universal approximation property of Fuzzy Systems (FS) for a classe of second order UMS two Degrees of Freedom (DOF). We firs...
Article
Full-text available
This paper proposes a method to estimate applied fitting force and interference between two press-fitted components by exploiting the stress stiffening effect on the dynamics of components before and after press-fit. Differently from specific solutions in literature, the proposed approach is independent of component dimensional characteristics, geo...
Article
Full-text available
In the biped robotics domain, head oscillations may be extremely harmful, especially if the robot is teleoperated, since vibrations strongly reduce the operator’s spatial awareness. In particular, undesired head oscillations occur in under-actuated robots, where springs and passive mechanisms are used to achieve a human-like motion. This paper prop...
Article
Full-text available
In the identification of mechanical systems through inverse receptance methods, a linear model is usually assumed, at least on a first approximation. However, most of the systems have a degree of nonlinearity in their elastic or dissipative properties. Usually, stiffness nonlinearities are identified, while damping nonlinearities are neglected or e...
Chapter
In this paper the second prototype of a manual wheelchair, named Handwheelchair.q, is presented. Handwheelchair.q is a manual wheelchair with an innovative system of propulsion inspired by a rowing gesture which has been made possible employing a cable for the motion transmission to a special freewheel connected to the wheel. As a result this gestu...
Chapter
Piezoelectric vibration energy harvesting has been extensively investigated in recent years and the majority of results focus on using the cantilever beam model under base driven motion. The main focus of this paper is to perform a parametric analysis of multi degrees of freedom piezo-elastic energy harvester to optimize the capability curve exploi...
Article
Full-text available
In structural dynamics, different damping models are used; however, due to modal decomposition, those models typically result in the use of the damping ratio as the modal damping parameter. If proportional viscous damping is used, the damping ratio can be related to the mass and stiffness parameters of a particular dynamic system, i.e. the damping...
Chapter
In this paper, a scheme to predict stress-stiffening effect on structures life assessment is proposed. The adopted methodology combines modal analysis and polynomial chaos expansion-based meta-model to evaluate stress distribution. It manages pre-stresses sources caused by manufacturing processes and quality control uncertainties. Experimental moda...
Conference Paper
A methodology for an efficient failure prediction of automotive steel wheels during fatigue experimental tests is proposed. The strategy joins the CDTire simulative package effectiveness to a specific wheel finite element model in order to deeply monitor the stress distribution among the component to predict damage. The numerical model acts as a So...
Conference Paper
The aim of this paper is to study in deep the peculiar test-rigs and experimental procedures adopted to the fulfilment of the principal requirements of automotive steel wheels, in particular regarding fatigue damaging. In the discussion, the standard requirements, the OEM specifications and the dimensional and geometric tolerances are approached. A...
Article
Full-text available
This paper proposes a procedure for computing magnetic losses in coaxial magnetic gears. These magnetic structures are made of permanent magnets and ferromagnetic poles in relative motion transferring torque between two shafts in a contactless way. The loss computation in magnetic materials is crucial to define the system performance. The flux dist...
Article
The present paper focuses on a deep investigation of crossing and veering phenomena in a specific mechanical structure. A deep analysis of the state of the art has been developed to highlight the key features of crossing and veering of frequencies during parametric changes of a structure. The analysed structure is an improvement of an existing test...
Article
Aim: This paper presents the study, design and prototyping of a manual wheelchair, named handwheelchair.q, with an innovative propulsion's system. The research is based on a novel system of propulsion that is more efficient and ergonomic than the hand rim one. The main goal of the designed prototype is to facilitate the mobility and to extend the r...
Chapter
In this paper, enrichments of automotive steel wheels design procedure are presented. The principal results are obtained using consolidated techniques as modal analysis and statistical approaches to estimate useful, but difficult to directly measure, system quantities. The methodology is applied to predict the local stiffening effect between the ri...
Conference Paper
The interaction between wind and an antenna prototype for the low-frequency radio telescope of the Square Kilometer Array (SKA) is experimentally tested in the wind tunnel of the Politecnico di Torino. The tests aim to predict the antenna behaviour during working conditions, i.e. mounted by means of five contact points to a metal grid on sandy grou...
Article
Full-text available
In this paper, an innovative system of propulsion inspired by a rowing gesture for manual wheelchairs is shown. The innovative system of propulsion, named Handwheelchair.q, can be applied to wheelchairs employed in everyday life and to sports wheelchairs for speed races, such as Handbike and Wheelchair racing. The general features of the innovative...
Article
This paper proposes the study of a magnetic gear by means of multi-objective optimisation. Magnetic gears are structures able to transfer motion between two or more mechanical axles with a given speed ratio. In this aspect they are analogous to a classical mechanical gear but they allow to transfer motion without contact between the moving parts. T...
Article
This paper investigates the effects of the shock absorbers of a passenger body in white car on identified modal properties and damping matrices. The authors propose an experimental approach to evaluate the changes induced by localised dissipations on damping matrices and modal behaviour. The shock absorbers behave as localised viscous dampers; ther...
Chapter
Mechanical effects and dynamic behaviour of a modern violin, built on a Guarneri del Gesù model, were examined via parametric experimental modal analysis. Among the few mobile components of a violin, the soundpost has a particular relevance for the final acoustic performance, even if its dimensions are extremely small. Therefore, the aim of this fi...
Chapter
In this paper the development of an innovative system of propulsion for manual wheelchair is described. It can be applied to sports wheelchairs and to wheelchair employed in everyday life. Regarding sports wheelchair, the use of this system of propulsion for racing wheelchair and hand bike is shown. The innovative system of propulsion tries to solv...
Conference Paper
This paper aims to analyse the most influent component mode shapes on the dynamic properties of a whole motorbike frame. Experimental and numerical modal analyses have been carried out on chassis, swingarm, engine, wheel and different subsystems of increasing complexity. The component global modes shapes are traced from component to assembly with b...
Conference Paper
In the Layer Method the damping matrix is written as a sum of several layers characterised by a semi-definite positive elementary matrix. Each layer is modulated by an unknown damping coefficient and finally expanded to the system total dimensions, using a localisation matrix based on the system topology. The linear and nonlinear spatial damping di...
Article
A new method is developed for direct damping matrix identification using experimentalreceptance-matrix data together with physical connectivity constraints based on what are described as layers. A number of spectral lines are considered in symmetric frequency bands around the damped peaks of the receptances and the identification procedure is shown t...
Article
Full-text available
Input–output partial feedback linearisation is experimentally implemented on a non-smooth nonlinear system without the necessity of a conventional system matrix model for the first time. The experimental rig consists of three lumped masses connected and supported by springs with low damping. The input and output are at the first degree of freedom w...
Article
A spherical pendulum test rig development procedure is presented. Due to the wide state of the art and hardly comparable experimental results, a modular design is proposed. An iterative development based on the model assumptions, control strategies, system kinematic and components sizes is adopted. A progressive rise in the model complexity is tune...
Article
Full-text available
The aim of this work is to show an innovative system of propulsion for manual wheelchair, named handwheelchair.q. The idea of the realisation of an alternative manual propulsive system comes from the analysis of the various problematic issues related to the classic ringsystem and the other mobility means. The innovative system of propulsion is insp...
Article
Full-text available
Input-output partial feedback linearisation is demonstrated experimentally for the first time on a system with non-smooth nonlinearity, a laboratory three degrees of freedom lumped mass system with a piecewise-linear spring. The output degree of freedom is located away from the nonlinearity so that the partial feedback linearisation possesses nonli...
Conference Paper
Damping identification and quantification is one of the most awkward problems in studying dynamics of mechanical systems. When damping cannot be defined as classical or proportional viscous, real modal analysis is not the most suitable tool; instead Duncan approach is more appropriate. In the latter case the system modal parameters will be complex...
Chapter
Simulations of nonlinear mechanical systems have always been a challenge due to their computational cost: even though techniques able to reduce simulations cost have been deeply studied in the last decades, this is still an open field of research. Methods used to reduce model size are known as model order reduction methods.
Chapter
During the design process, especially in systems where dynamic characteristics are crucial, modal analysis is an instrument to understand the response of systems subject to external loads. The presence of a resonance into the component operative range usually sounds like an alarm bell, and modal analysis highlights this. But modal analysis gives ju...
Article
Energy harvesting allows making sensors or transmitters electrically autonomous. Several studies have been proposed but in most cases lack of electrical and mechanical parts integration and practical application purpose. Here, with the aim of supply a Bluetooth step-counter placed in the sole of a training shoe, a complete system is presented. It c...
Chapter
Indirect estimation of the stiffening effect caused by the fitting process of an automotive wheel is hereby presented to detect optimal interference of automotive steel wheels. The effects are related to components and assembly characteristics, such as masses and natural frequencies. Both the components of the wheel, which are disc and rim, are sub...
Article
Synchronous reluctance motors (SyRM) produce torque thanks to the rotor magnetic anisotropy, without use of permanent magnets (PMs) or windings on their rotor. Consequently, SyRMs are cost-competitive against costly PM synchronous machines and more efficient than asynchronous motors, because of the absence of the squirrel cage and related Joule los...
Article
This paper describes the design and test of some textile pneumatic muscles prototypes. Tests were carried out on materials, geometries and some numerical models constructed for a better characterization of these devices. The results are interesting and provide ideas for further research in applications such as active clothing where the pneumatic mu...
Article
A family of parametric 3D CAD models based on stochastic distribution of not-engineering real life object has been studied. The subject considered was the Tonda Gentile Trilobata (TGT) hazelnut variety, which is the most important variety in the Langhe region in Piedmont, Italy. The aim was to obtain a master model which measured, or stochastically...
Chapter
This paper focuses on the correlation between Experimental Modal Analysis (EMA) and Finite Element Analysis (FEA) of an automotive component where different parameters can affect the simplicity of a linear approach. The component is a heat-shield that covers the catalytic converter through rigid brackets and fasteners. Thermal refractory, viscous a...
Chapter
Contribution of gear, shaft and bearing stiffnesses to the gear dynamics is an important aspect that can affect the gearbox behavior. Nowadays, it is possible to simulate the gear mating with a very accurate numerical approach, but with the drawback of very huge computational effort. Gear designers in first design steps need instruments able to giv...
Article
Purpose – The purpose of this paper is to describe an electro-mechanical lumped parameters model used for the simulation of an energy harvester device. Design/methodology/approach – The model is taking into account the main features of both mechanical and electromagnetic phenomena keeping the computational burden as low as possible to insert it in...
Article
The paper presents a magneto-rotordynamic model that allows to obtain the nonlinear equations of motion for all rigid body modes of the Levitron®. These equations describe the complete dynamic behaviour of the spinning top and highlight the presence of stability fields related to its spin speed and vertical position of levitation. The developed mod...
Conference Paper
Energy harvesting from different vibration sources is typically designed by means of a single degree of freedom approach and implementing both linear and nonlinear principles and techniques. In this paper, starting from the experience of the authors in different applications and using linear magneto-inductive electromechanical oscillators, a two-de...
Conference Paper
Operational boundary conditions of actual structures are often a crucial and difficult aspect in model updating of CAD/CAE models based on dynamic tests and experimental modal identification. In this work two grinding machines are experimentally tested through roving hammer impact tests. Due to the importance of comparing two different solutions of...
Article
Powering a remote wireless sensor is a challenging task if batteries are not suitable or enough capacious and their substitution is not feasible. In this project a remote wireless sensor is placed inside training shoes with the aim to collect and transmit data to evaluate and track the performance of an athlete. The primary energy source is the imp...
Article
Parametric resonances can occur in internally stressed systems due to the periodic variation of the stiffness in time. Parametric resonance can lead to unstable dynamic behaviour; however, their response is limited by existing nonlinearities in the system, thus resulting in limit cycle oscillations (LCOs). This phenomenon can be exploited in the de...
Article
An experimental investigation of the effects of the fitting procedure of disk and rim in automotive wheels on their dynamic behaviour is reported. Due to the variation of mass and fitting diameters of the two components, the goodness of the process is evaluated through the assembled wheel dynamics. The geometrical data of an experimental measuring...
Article
Three point bending test FEM In order to improve the performance of shelling machines, and to enhance the numerical modelling of anisotropic behaviour of hazelnuts shells, the mechanical properties of shells are useful experimental data. A procedure to obtain an effective numerical model and to calibrate anisotropic material properties by means of...
Patent
Full-text available
A method and system for generating electric energy in a tire includes a device including a housing that extends according to a longitudinal axis X, at least one electrical winding, a magnet movable within the housing along the longitudinal axis, and a force providing element positioned at at least one of two opposite ends of the housing, which is a...
Article
This article presents a methodology for the treatment of uncertainty in nonlinear, interference-fit, stress analysis problems arising from manufacturing tolerances. Image decomposition is applied to the uncertain stress field to produce a small number of shape descriptors that allow for variability in the location of high-stress points when geometr...
Article
The adhesive bonding technology can be used in combination with other traditional joining methods, such as mechanical fastening techniques (e.g. rivets or bolts) or welding techniques, generating a hybrid joint. Hybrid adhesive joints are designed to exploit the advantages of the different techniques and, if possible, overcome their drawbacks. This...
Article
Purpose – Supplying remote wireless sensors is not an easy task if the site where the device is located is not easily accessible. In order to obtain direct measurements of the road-vehicle interactions, sensors must be placed inside the tyre environment thus a power supply must be available for their working there without any wire connection with t...
Conference Paper
The dynamic properties of crossing and veering in coupled structures have been studied both numerically and analytically, but they are difficult to investigate using Finite Element Analysis because of the change in the topological arrangement due to the different configuration. Isogeometric Analysis, recently developed method for numerical simulati...
Article
Parametric resonances can occur in internally stressed systems due to the periodic variation of the stiffness in time. Parametric resonance can lead to unstable dynamic behaviour; however, their response is limited by existing nonlinearities in the system, thus resulting in limit cycle oscillations (LCOs).This phenomenon can be exploited in the des...
Chapter
In this paper experimental investigations of interference fit effects on the dynamic behaviour of assembled wheels are provided. The performed analyses on the automotive components take into account manufacturing pre-stresses and dimensional tolerances of mating parts. Experimental modal analysis is made on a set of components with identical nomina...
Article
Full-text available
We present a Nitche’s method to couple non-conforming two and three-dimensional NURBS (Non Uniform Rational B-splines) patches in the context of isogeometric analysis (IGA). We present results for linear elastostatics in two and and three-dimensions. The method can deal with surface-surface or volume-volume coupling, and we show how it can be used...
Article
A strong integration between different design tools is desirable to improve the work of engineers, reducing the number of errors and speeding up the design process. In this article, the authors present a strong integration between three-dimensional computer-aided design models and multidomain simulation applied to the design of a magnetomechanical...
Article
Modal analysis is widely used both on single components and mechanical complex assemblies and it is recognized to be a fundamental step on the functional design process. From experimental point of view, a change in a system parameter due to the need of describing a different assembly configuration, can require iterative measurements, and can be qui...
Article
Nowadays, manufacturing industries have to shorten the time to market in order to satisfy needs of customers and to survive in global competitive markets. For these reasons a new type of product data development and management is necessary. The Product Lifecycle Management (PLM) is an emerging philosophy to improve strategic engineering for managin...
Conference Paper
Full-text available
In the automotive industry a significant part of research is dedicated to design and produce better products. The unavoidable presence of uncertainties in manufacturing processes and structural parameters leads to the necessity to develop stochastic models able to correctly represent physical behaviours. This paper presents numerical and experiment...
Article
Feed electrical wireless devices by recycling the energy "wasted" in other phenomena is the main aim of the energy harvesting process. However, the reduced amount of available energy compared to the requirements of common electrical devices, is due not only to the type of source but also to the dimensional constraints imposed, and it makes necessar...
Article
Powering a remote wireless sensor is a challenging task if batteries are not suitable or enough capacious and their substitution is not feasible. A remote wireless sensor can be placed inside a shoe with the aim to collect and transmit data to evaluate and track the performance of an athlete. The primary energy source is the impact between the shoe...
Article
This article presents a very compact electromechanical wideband energy harvester optimized for tire applications. The device exploits an asymmetric magnetic spring to be adaptive and effective at almost any vehicle speed. The device has been simulated through an experimentally validated SIMULINK block-oriented model. The simulation takes into accou...
Conference Paper
This paper presents an application of a well-known model updating approach based on the inverse eigensensitivity method. The methodology is applied to an avionic equipment that supports different electronic instruments. In order to predict the operative dynamic behavior, a modal analysis is necessary, but high modal density and effects of nonlinear...
Article
This paper describes modeling and experimental testing of a magneto-mechanical energy scavenger. The examined device is a vibration-driven linear generator, where the translator is constituted by a permanent magnet and the stator by two axial coils. Two fixed permanent magnets act on the translator as a nonlinear hardening spring. Analytical, numer...
Article
This article presents multidisciplinary optimization methods applied to the design and performance evaluation of a magneto-mechanical energy scavenger for automotive wireless tire sensors. Optimal performance strictly depends on source characteristics, volume, weight and power density targets, energy scavenger typology, technological and manufactur...
Article
In the present paper, starting from a first attempt design of engine components, a CAD/CAE integrated approach for designing engine is proposed. As first step, some typological quantities are setting in order to define the designed engine, for example the number of cylinders, displacements, thermodynamic cycle and geometrical constraints. Using lit...
Conference Paper
Usually, both an experimental modal analysis or a numerical modal analysis performed on reduced model present the problem of master nodes selection. A methodology based on the experience is normally used or computationally heavy criterion can be applied. In that paper, the Modal-Geometrical Selection Criterion (MoGeSeC) is applied to a crankshaft,...
Article
This paper presents a multi-physic modeling of an electromechanical energy scavenging device able to supply energy inside car tires for wireless sensors. A permanent magnet, connected to the inner liner of a tire, is accelerated along a guide by the tire deformation during car motion; by interacting with coils it generates a power which is conditio...
Chapter
When the floating magnetic spin called Levitron® was presented on market, it caught the attention of how a spinning top could trick the famous Earnshaw’s theorem of magnetic levitation instability. Although it is well known that gyroscopic effect stabilizes the rotor of this magnetic top, consistent analytical models and exhaustive explanations abo...
Chapter
Usually, the problem of master nodes selection characterizes both computational or experimental modal analyses and defines the numerical properties of reduced models that possess equivalent dynamic properties. Methodologies based on experience are normally used or heavy time-consuming numerical algorithms can be applied. In that paper, the Modal-Ge...
Chapter
Full-text available
Theory of curve crossing and curve veering phenomena is well known in structural dynamics, but only few papers have used test bench to demonstrate and validate this eigenvalues behaviour. The aim of this paper is to present a theoretical and experimental analysis on a nonsymmetric experimental structure with eigenvalues curve veering and crossing p...
Article
The hazelnut production for food-farming field industry is made up of several processes and some of those could be suitable for performing virtual simulations. An aim for using simulations is to check the strong and weak features of the machineries and then apply suitable modifications. Both machineries and hazelnuts 3D models are then requested bu...