Bibliographies thématiques / Tilting vehicle

Littérature scientifique sur le sujet « Tilting vehicle »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Tilting vehicle"

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Xu, Dongxin, Yueqiang Han, Xianghui Han, Ya Wang et Guoye Wang. « Narrow Tilting Vehicle Drifting Robust Control ». Machines 11, no 1 (10 janvier 2023) : 90. http://dx.doi.org/10.3390/machines11010090.

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The narrow tilting vehicle receives extensive public attention because of traffic congestion and environmental pollution, and the active rolling motion control is a traffic safety precaution that reduces the rollover risk caused by the structure size of the narrow vehicle. The drifting motion control reflects the relatively updated attentive research of the regular-size vehicle, which can take full advantage of the vehicle’s dynamic performance and improve driving safety, especially when tires reach their limits. The narrow tilting vehicle drifting control is worthy of research to improve the driving safety of the narrow tilting vehicle, especially when tires reach the limit. The nonlinear narrow tilting vehicle dynamic model is established with the UniTire model to describe the vehicle motion characteristics and is simplified to reduce the computation of the drifting controller design. The narrow tilting vehicle drifting controller is designed based on the robust theory with uncertain external disturbances. The controller has a wide application, validity, and robustness and whose performance is verified by realizing different drifting motions with different initial driving motions. The narrow tilting vehicle drifting robust control has some practical and theoretical significance for more research.
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Gao, Ruolin, Haitao Li, Wenjun Wei et Ya Wang. « Research on the Decoupling of the Parallel Vehicle Tilting and Steering Mechanism ». Applied Sciences 12, no 15 (26 juillet 2022) : 7502. http://dx.doi.org/10.3390/app12157502.

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Active tilting vehicles tilt to the inside of the corner when the vehicle is steering. The tilting motion improves the steering and roll stability of the vehicle. The steering mechanism and the tilting mechanism of the vehicle are connected in parallel. The transmission of the steering mechanism is influenced by the movements of the tilting mechanism. In order to solve this problem, a parallel mechanism is proposed in this paper. It consists of a spatial steering mechanism and a tilting mechanism in parallel. A mathematical model of the parallel mechanism with the wheel alignment parameters has been established. The model calculates the decoupling conditions of the parallel mechanism. In this study, a decoupling method for the parallel mechanism is proposed. A prototype of the parallel mechanism was designed according to the proposed method. The prototype was found to reduce the influence of vehicle tilting on the outer and inner wheel steering angles by up to 0.64% and 0.78%, respectively. The steering geometry correction rate of the prototype is between 1.198 and 0.961. The correctness of the model was verified by experimentation on the prototype. The proposed method can effectively decouple the tilting motion and steering motion of the vehicle and make the wheels on both sides satisfy the Ackerman steering condition.
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Cheng, Yung-Chang, Chern-Hwa Chen et Chin-Te Hsu. « Derailment and Dynamic Analysis of Tilting Railway Vehicles Moving Over Irregular Tracks Under Environment Forces ». International Journal of Structural Stability and Dynamics 17, no 09 (23 octobre 2017) : 1750098. http://dx.doi.org/10.1142/s0219455417500985.

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Utilizing a nonlinear creep model, the dynamic behavior of tilting railway vehicles moving over curved tracks with rail irregularities and under earthquakes and wind loads is studied. The car model adopted consists of 28 degrees of freedom, capable of simulating the lateral, vertical, roll and yaw motions for the wheelsets, truck frames and car body. The derailment quotient is investigated to analyze the running safety of a tilting railway vehicle using the linear and nonlinear creep models, while considering the rail irregularities and environmental forces for various tilting angles. Generally, the derailment risk of the tilting railway vehicle is higher than that of non-tilting railway vehicle with or without rail irregularities and environmental forces. The derailment quotients calculated by the linear creep model are underestimated for a tilting railway vehicle. In addition, the derailment quotients evaluated for rough rails and under environmental forces are higher than those obtained for smooth rails with no environmental forces. It is confirmed that rail irregularities and each type of environmental forces have decisive effects on derailment quotients. They are compared and ranked according to their significance.
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Ren, Yaxing, Truong Quang Dinh, James Marco et David Greenwood. « Torque vectoring–based drive : Assistance system for turning an electric narrow tilting vehicle ». Proceedings of the Institution of Mechanical Engineers, Part I : Journal of Systems and Control Engineering 233, no 7 (14 janvier 2019) : 788–800. http://dx.doi.org/10.1177/0959651818823589.

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The increasing number of cars leads to traffic congestion and limits parking issue in urban area. The narrow tilting vehicles therefore can potentially become the next generation of city cars due to its narrow width. However, due to the difficulty in leaning a narrow tilting vehicle, a drive assistance strategy is required to maintain its roll stability during a turn. This article presents an effective approach using torque vectoring method to assist the rider in balancing the narrow tilting vehicles, thus reducing the counter-steering requirements. The proposed approach is designed as the combination of two torque controllers: steer angle–based torque vectoring controller and tilting compensator–based torque vectoring controller. The steer angle–based torque vectoring controller reduces the counter-steering process via adjusting the vectoring torque based on the steering angle from the rider. Meanwhile, the tilting compensator–based torque vectoring controller develops the steer angle–based torque vectoring with an additional tilting compensator to help balancing the leaning behaviour of narrow tilting vehicles. Numerical simulations with a number of case studies have been carried out to verify the performance of designed controllers. The results imply that the counter-steering process can be eliminated and the roll stability performance can be improved with the usage of the presented approach.
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Tang, Chen, Avesta Goodarzi et Amir Khajepour. « A novel integrated suspension tilting system for narrow urban vehicles ». Proceedings of the Institution of Mechanical Engineers, Part D : Journal of Automobile Engineering 232, no 14 (26 novembre 2017) : 1970–81. http://dx.doi.org/10.1177/0954407017738274.

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Narrow vehicles are proposed to resolve urban transportation issues such as congestion, parking, fuel consumption and pollution. They are characterized by a high ratio of centre of gravity height over track width. Such vehicles are vulnerable to rollover and stability issues when negotiating curves at a normal operating speed. Therefore, the tilting capability is crucial to such vehicles. Existing solutions, which mechanically connect the wheel module on both sides and synchronize their movement, still have room for further improvement. The extra links for synchronization not only take up space on compact urban vehicles, but also introduce additional mass to the light-weighted body. The novel tilting mechanism introduced in this work utilizes hydraulics to replace mechanical connections to generate the tilting motion. An interconnected hydro-pneumatic suspension system is adopted to provide the desired bump and roll stiffness for narrow urban vehicle applications. Two independently controlled hydraulic pumps are connected to the hydraulic suspensions to provide the tilting, as well as riding height change capabilities. The integration of the tilting system with suspension reduces the system weight and packing size, both of which are vital to the success of narrow urban vehicles. All the functionalities are illustrated, modelled and examined in the simulation studies, which prove the feasibility of the proposed system on narrow urban vehicle applications resulting in more functionalities with lower complexity and weight.
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Cheng, Yung-Chang, et Chin-Te Hsu. « Parametric Analysis of Ride Comfort for Tilting Railway Vehicles Running on Irregular Curved Tracks ». International Journal of Structural Stability and Dynamics 16, no 09 (novembre 2016) : 1550056. http://dx.doi.org/10.1142/s021945541550056x.

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The ride comfort of a tilting railway vehicle moving on curved tracks with rail irregularities is studied. Using the nonlinear creep model and Kalker's linear theory, the governing differential equations of motion for a tilting railway vehicle running on irregular tracks are first derived. The tilting railway vehicle is modeled by a 27 degree-of-freedom (DOF) car system, considering the lateral displacement, vertical displacement, roll angle and yaw angle of both the wheelsets and bogie frames, as well as the lateral displacement, roll angle and yaw angle of the car body. Based on the international standard ISO 2631-1, the effect of vehicle speed on the ride comfort index of the tilting vehicle is investigated for various tilting angles, using both linear and nonlinear creep models, and various radii of curved tracks, as well as for various suspension parameters. Finally, the ride comfort indices computed with rail irregularities are found to be higher than those with no rail irregularities, indicating that the effect of rail irregularities on the ride comfort of a tilting vehicle cannot be disregarded in practice.
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Suchánek, Andrej, Mária Loulová et Jozef Harušinec. « Evaluation of passenger riding comfort of a rail vehicle by means dynamic simulations ». MATEC Web of Conferences 254 (2019) : 03009. http://dx.doi.org/10.1051/matecconf/201925403009.

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Dynamical analysis plays a key role in development and optimalization of rail vehicles. The article deals with simulation analysis of a rail vehicle with an active tilting system of the vehicle body, design of the rail vehicle in CAD program CATIA and dynamical analysis in program SIMPACK, with the RAIL expansion. Such body mounting on vehicle bogies is significantly more complicated than the design of conventional rail vehicles. The purpose of this type of body mounting is to increase the size of body tilt during ride in a curve and thus reduce the lateral unbalanced acceleration affecting the passengers, or allow higher driving speed in a curve with the same radius while keeping the lateral acceleration value respectively. Eight variants of different velocity, vehicle occupancy and setting of the tilting mechanism were analyzed. We determined the average value of passenger comfort from the simulation results. We have determined the value of passenger comfort during the ride in a curve from the simulation results.
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Cheng, Yung Chang, Chin Te Hsu, Te Wen Tu, Chern Hwa Chen et Meng Ju Tsai. « Derailment Analysis of Tilting Railway Vehicles with Wind Loads ». Advanced Materials Research 488-489 (mars 2012) : 1252–56. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.1252.

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In this article, equations of motion of tilting vehicle system, considering the lateral displacement, roll angle and yaw angle of each wheelset, the lateral displacement, vertical displacement, roll angle and yaw angle of the truck frame and the car body, are derived. The tilting vehicle system is modeled by a tilting train system with 24 degree-of-freedom (24-DOF) system traveling on curved tracks. Considering the cross-wind forces acting on the car body in the lateral, vertical and roll directions, the influences of the vehicle speeds on derailment quotients are investigated. Additionally, the effects of the vehicle speeds on the derailment quotients are presented and compared with wind loads and the various tilting angles.
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Chong, JJ, James Marco, David Greenwood, J. J. Chong, James Marco et David Greenwood. « Modelling and Simulations of a Narrow Track Tilting Vehicle ». Exchanges : The Interdisciplinary Research Journal 4, no 1 (31 octobre 2016) : 86–105. http://dx.doi.org/10.31273/eirj.v4i1.149.

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Narrow track tilting vehicle is a new category of vehicle that combines the dynamical abilities of a passenger car with a motorcycle. In the presence of overturning moments during cornering, an accurate assessment of the lateral dynamics plays an important role to improve their stability and handling. In order to stabilise or control the narrow tilting vehicle, the demand tilt angle can be calculated from the vehicle’s lateral acceleration and controlled by either steering input of the vehicle or using additional titling actuator to reach this desired angle. The aim of this article is to present a new approach for developing the lateral dynamics model of a narrow track tilting vehicle. First, this approach utilises the well-known geometry ‘bicycle model’ and parameter estimation methods. Second, by using a tuning method, the unknown and uncertainties are taken into account and regulated through an optimisation procedure to minimise the model biases in order to improve the modelling accuracy. Therefore, the optimised model can be used as a platform to develop the vehicle control strategy. Numerical simulations have been performed in a comparison with the experimental data to validate the model accuracy.
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CHENG, YUNG-CHANG, CHENG-HAO HUANG, CHEN-MING KUO et CHERN-HWA CHEN. « DERAILMENT RISK ANALYSIS OF A TILTING RAILWAY VEHICLE MOVING OVER IRREGULAR TRACKS UNDER WIND LOADS ». International Journal of Structural Stability and Dynamics 13, no 08 (21 octobre 2013) : 1350038. http://dx.doi.org/10.1142/s0219455413500387.

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Based on the nonlinear creep model and Kalker's linear theory, this paper studies the governing differential equations of motion for a tilting railway vehicle moving over irregular curved tracks under wind loads. The tilting vehicle is modeled by a 24-degree-of-freedom (24-DOF) car system, considering the lateral, roll and yaw motions of each wheelset, the lateral, vertical, roll and yaw motions of each bogie frame and the car body. The derailment quotients of the tilting railway vehicle with the wheelsets moving over irregular rails in the lateral direction and the car body acted upon by the wind loads are investigated for various tilting angles. The analysis results show that in general, the derailment quotient of the wheelset increases as the tilting angle of the railway vehicle increases. When the railway vehicle moves at low speeds, the derailment quotient calculated for the case with rail irregularities is greater than that for the case with no rail irregularities. Moreover, the derailment quotient of a wheelset moving over curved tracks of various radii is presented. Finally, the derailment quotient computed for the case under wind loads is greater than that free of wind loads. As a result, the influence of rail irregularities and wind loads on the derailment risk of a tilting vehicle cannot be ignored.
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Thèses sur le sujet "Tilting vehicle"

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Robertson, James. « Active control of narrow tilting vehicle dynamics ». Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636544.

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Narrow tilting vehicles offer an opportunity to tackle both traffic congestion and carbon emissions having a small footprint, low weight and small frontal area. Their narrow width requires that they tilt into corners in order to maintain stability; this may be achieved by means of an automated tilt control system. A three-wheeled tilting vehicle prototype, known as the Compact Low Emission Vehicle for uRban transport (CLEVER), was constructed at the University of Bath in 2006. The vehicle was equipped with a direct tilt control system in which a pair of hydraulic actuators applied a moment between the cabin and a non-tilting base. This tilt control system provided satisfactory steady state performance but limited transient stability. High tilt rate demands associated with rapid steering inputs would lead to large tilting moments being applied to the non-tilting rear engine module; this, combined with the engine module’s own propensity to roll out of the bend, could cause the inside wheel to lift and the vehicle to capsize. This thesis details the implementation of a Steering Direct Tilt Control (SDTC) system, whereby the front wheel steer angle is used to generate some of the tilting moment, on the prototype CLEVER Vehicle. Simulation and experimental results are presented which show a 40% reduction in load transfer across the rear axle during a transient ramp steer manoeuvre. The influence of the SDTC system, and associated steer angle alteration, on the vehicle trajectory is considered. A human driver is found to be capable of adapting their steer inputs such that they can follow their chosen path. Finally, a feed-forward control strategy is shown to reduce the load transfer across the rear axle by an additional 30% in transient situations, but only if the steer input signal is sufficiently free of noise.
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Berote, Johan J. H. « Dynamics and control of a tilting three wheeled vehicle ». Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.535641.

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Barker, Matthew Iain. « Chassis design and dynamics of a tilting three-wheeled vehicle ». Thesis, University of Bath, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432834.

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Van, Poelgeest Auguste. « The dynamics and control of a three-wheeled tilting vehicle ». Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.535640.

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The objective of this study was to develop a new Steer Tilt Control (STC) algorithm inspired by real driver behaviour and to test it in simulation with an experimentally validated non-linear vehicle model. In order to develop an exhaustive simulation model of the vehicle and to process experimental data correctly, a large number of modelling aspects were taken into consideration. The objective of the study was to identify the unique kinematics of a three-wheeled tilting vehicle and determine the importance of the kinematic effects on the vehicle system. In order to fully understand this unique class of vehicle, the effect of the driver’s mass on the vehicle inertia’s and the effect of the tilting on the vehicle’s yaw inertia were considered. A wide-ranging expression for the driver’s perceived acceleration was derived and the roll dynamics of the non-tilting part of the three-wheeled tilting vehicle assembly were modelled. The steering torque of the vehicle as fully analysed and, using the simulation model, methods to model the effect of a crosswind on the vehicle, to test the effect of driving up or downhill, and to determine the effect of road camber on the vehicle dynamics were considered. To create a better understanding of the control task, road experiments were carried out using an instrumented tilting three-wheeler to investigate the driver steer inputs necessary to both balance the vehicle and follow a fixed trajectory. The experimental results demonstrated that the drivers’ steering inputs varied even though they had to complete identical tasks. This result confirmed that there are multiple ways to control the roll of the vehicle. The results also showed that the tilt angle always led the steering angle and for a transient manoeuvre, the tilt angle was larger than the balanced tilt angle at the start of the manoeuvre and smaller than the balanced angle at the end of the manoeuvre. The next step in the investigation was the development of a comprehensive non-linear dynamics model of a tilting three-wheeler including a tyre model and a driver model. A new method was developed to estimate the parameters of a Magic Formula Tyre model using the road testing data. The vehicle and tyre model were validated using data from a range of test runs. The importance of a driver in the loop was recognised and the elements of a driver trajectory-tracking model were studied. The aim was to develop a driver model that demonstrated good i tracking and some similarity to real driver behaviour. The final model used the yaw rate demand to determine an anticipatory control steer angle and the current heading error and the vehicle’s lateral position error measured in the vehicle’s local axis system to make small steering adjustments. The STC method based on Proportional Integral Derivative (PID) control was tested with the vehicle model to determine its performance with the non-linear dynamics and the driver in the loop. It was shown that the driver model had the tendency to act against the STC and that the two could only act simultaneously for a very limited range of demand trajectory and velocity combinations. The crosswind, hill driving, and road camber models were combined with the vehicle simulation without a driver but with the PID based STC. The simulations showed that these environmental factors made the control task significantly more difficult. More importantly, it showed that these factors demanded an increased number of vehicle states to be fed back to the controller. A new algorithm for STC was developed using the full vehicle and driver model. One of the criteria was that the control algorithm had to be realizable in practice. The resulting controller was a logic algorithm that would choose an action based on the steering angle and velocity and the vehicle speed with online gain adjustment based on direction and order of magnitude of the perceived acceleration. The basis of the control was adjustment of the driver's steering input and it was shown that the vehicle's deviation from the driver's intended path was minimal.
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Förstberg, Johan. « Ride comfort and motion sickness in tilting trains ». Doctoral thesis, KTH, Vehicle Engineering, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2985.

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Persson, Rickard. « Tilting trains : Enhanced benefits and strategies for less motion sickness ». Doctoral thesis, KTH, Spårfordon, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33077.

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Carbody tilting is today a mature and inexpensive technology that allows higher train speeds in horizontal curves, thus shortening travel time. This doctoral thesis considers several subjects important for improving the competitiveness of tilting trains compared to non-tilting ones. A technology review is provided as an introduction to tilting trains and the thesis then focuses on enhancing the benefits and strategies for less motion sickness. A tilting train may run about 15% faster in curves than a non-tilting one but the corresponding simulated running time benefit on two Swedish lines is about 10%. The main reason for the difference is that speeds are set on other grounds than cant deficiency at straight track, stations, bridges, etc. The possibility to further enhance tilting trains’ running speed is studied under identified speed limitations due to vehicle-track interaction such as crosswind requirements at high speed curving. About 9% running time may be gained on the Stockholm–Gothenburg (457 km) mainline in Sweden if cant deficiency, top speed, and tractive performance are improved compared with existing tilting trains. Non-tilting high-speed trains are not an option on this line due to the large number of 1,000 m curves. Tilting trains run a greater risk of causing motion sickness than non-tilting trains. Roll velocity and vertical acceleration are the two motion components that show the largest increase, but the amplitudes are lower than those used in laboratory tests that caused motion sickness. Scientists have tried to find models that can describe motion sickness based on one or more motion quantities. The vertical acceleration model shows the highest correlation to motion sickness on trains with active tilt. However, vertical acceleration has a strong correlation to several other motions, which precludes vertical acceleration being pointed out as the principal cause of motion sickness in tilting trains. Further enhanced speeds tend to increase carbody motions even more, which may result in a higher risk of motion sickness. However, means to counteract the increased risk of motion sickness are identified in the present work that can be combined for best effect. Improved tilt control can prevent unnecessary fluctuations in motion sickness related quantities perceived by the passengers. The improved tilt control can also manage the new proposed tilt algorithms for less risk of motion sickness, which constitute one of the main achievements in the present study. Local speed restrictions are another means of avoiding increased peak levels of motion sickness when increasing the overall speed. The improved tilt control and the proposed tilt algorithms have proven to be effective in on-track tests involving more than 100 test subjects. The new tilt algorithms gave carbody motions closer to non-tilting trains. Rather unexpectedly, however, the test case with the largest decrease in tilt gave a greater risk of motion sickness than the two test cases with less reduction in tilt. It is likely that even better results can be achieved by further optimization of the tilt algorithms; the non-linear relation between motions and motion sickness is of particular interest for further study.
QC 20110429
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Persson, Rickard. « Tilting trains : Technology, benefits and motion sickness ». Licentiate thesis, KTH, Aeronautical and Vehicle Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4771.

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Carbody tilting is today a mature and inexpensive technology allowing higher speeds in curves and thus reduced travel time. The technology is accepted by most train operators, but a limited set of issues still holding back the full potential of tilting trains. The present study identifies and report on these issues in the first of two parts in this thesis. The second part is dedicated to analysis of some of the identified issues. The first part contains Chapters 2 to 5 and the second Chapters 6 to 12 where also the conclusions of the present study are given.

Chapters 2 and 3 are related to the tilting train and the interaction between track and vehicle. Cross-wind stability is identified as critical for high-speed tilting trains. Limitation of the permissible speed in curves at high speed may be needed, reducing the benefit of tilting trains at very high speed. Track shift forces can also be safety critical for tilting vehicles at high speed. An improved track standard must be considered for high speed curving.

Chapters 4 and 5 cover motion sickness knowledge, which may be important for the competitiveness of tilting trains. However, reduced risk of motion sickness may be contradictory to comfort in a traditional sense, one aspect can not be considered without also considering the other. One pure motion is not the likely cause to the motion sickness experienced in motion trains. A combination of motions is much more provocative and much more likely the cause. It is also likely that head rotations contribute as these may be performed at much higher motion amplitudes than performed by the train.

Chapter 6 deals with services suitable for tilting trains. An analysis shows relations between cant deficiency, top speed, tractive performance and running times for a tilting train. About 9% running time may be gained on the Swedish line Stockholm – Gothenburg (457 km) if cant deficiency, top speed and tractive performance are improved compared with existing tilting trains. One interesting conclusion is that a non-tilting very high-speed train (280 km/h) will have longer running times than a tilting train with today’s maximum speed and tractive power. This statement is independent of top speed and tractive power of the non-tilting vehicle.

Chapters 7 to 9 describe motion sickness tests made on-track within the EU-funded research project Fast And Comfortable Trains (FACT). An analysis is made showing correlation between vertical acceleration and motion sickness. However, vertical acceleration could not be pointed out as the cause to motion sickness as the correlation between vertical acceleration and several other motions are strong.

Chapter 10 reports on design of track geometry. Guidelines for design of track cant are given optimising the counteracting requirements on comfort in non-tilting trains and risk of motion sickness in tilting trains. The guidelines are finally compared with the applied track cant on the Swedish line Stockholm – Gothenburg. Also transition curves and vertical track geometry are shortly discussed.

Chapters 11 and 12 discusses the analysis, draws conclusions on the findings and gives proposals of further research within the present area.

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Caneri, Massimiliano. « Design and development of the MotoMacchina vehicle ». Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423757.

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This work concerns the design and development of a tilting four-wheeled vehicle. The peculiari- ties of this prototype required, first, the adoption of a fast, simple, trial and error based approach to develop case knowledge and find out possible design problems. Then, a more methodical numerical-based approach was used to find performing solutions to the very particular issues. Specific multibody models of roll, steer and suspension subsystems were self-constructed ad used in numerical optimizations. In all cases, satisfying results were achieved. In addition, the constructive design and fabrication of main subsystems were performed.
Il presente lavoro è finalizzato alla progettazione ed allo sviluppo di un veicolo a quattro ruote rollanti. Le peculiarità del prototipo hanno richiesto, dapprima, l’utilizzo di un semplice e veloce approccio di tipo empirico, finalizzato ad accrescere la conoscenza dello specifico caso progettuale ed evidenziare possibili problemi nella fase di design. In un secondo momento, è stato usato un approccio maggiormente metodico e basato su metodi numerici, al fine di individuare soluzioni profittevoli agli specifici problemi del caso di studio. Modelli multibody specifici degli apparati di rollio, sterzo e sospensioni sono stati autocostruiti ed utilizzati nelle ottimizzazioni numeriche. In tutti i casi trattati, sono stati raggiunti risultati soddisfacenti. Infine, sono state effettuate la progettazione costruttiva e la realizzazione dei principali sottoassiemi.
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Zamzuri, Hairi. « Intelligent model-based robust control for tilting railway vehicles ». Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/33896.

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High-speed trains have become one of the main means of public transportation around the world. The use of tilting train technologies on high-speed trains has contributed to cost effectiveness by reducing journey time between two places without the need to develop a new high-speed rail track infrastructure. Current technologies in tilting railway vehicles use a 'precedence' control scheme. This scheme uses a measurement from the front vehicle to capture 'precedence' information. Research on local sensor loop control strategies is still important to overcome the complexity of using precedence control technique. Work using conventional and modern control approaches has been investigated by previous researches. This study further extends these by investigating a particular intelligent control technique using fuzzy logic in designing the local feedback tilt control scheme.
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Mourad, Lama. « Contrôle actif de l'accélération latérale perçue d'un véhicule automobile étroit et inclinable ». Phd thesis, Ecole des Mines de Nantes, 2012. http://tel.archives-ouvertes.fr/tel-00787310.

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Les Véhicules Etroits et Inclinables (VEI) sont la convergence d'une voiture et d'un motocycle. Un mètre de largeur seulement suffit pour transporter une ou deux personnes en Tandem. Les VEI sont conçus dans le but de résoudre partiellement les problèmes de trafic routier, de minimiser la consommation énergétique et l'émission de polluants. De par leurs dimensions(ratio hauteur/largeur), ces véhicules doivent s'incliner en virage pour rester stable en compensant l'effet de l'accélération latérale. Cette inclinaison doit dans certains cas être automatique : elle peut être réalisée à l'aide d'un couple d'inclinaison généré par un actionneur dédié (système DTC), soit encore en modulant l'angle de braquage des roues (Système STC). Nous avons proposé dans ce mémoire une méthodologie de synthèse d'un régulateur structuré minimisant la norme H2 d'un problème bien posé au bénéfice d'une régulation optimisée de l'accélération latérale, considérant tour à tour les systèmes DTC et STC. Les régulateurs proposés sont paramétrés par la vitesse longitudinale et s'avèrent performants et robustes, et les moyens de réglages proposés permettent d'étudier l'intérêt relatif d'une solution DTC pure ou mixte DTC/STC, permettant de supporter les développements futurs sur le sujet. L'originalité des solutions proposées en regard des études rencontrées dans la littérature porte en particulier sur le fait de choisir de réguler directement l'accélération latérale perçue (plutôt que l'angle d'inclinaison), en anticipant la prise de virage par la prise en compte des angles et vitesse de braquage. L'optimisation de la régulation permet de réduire de manière importante le couple d'inclinaison requis, et l'accélération latérale subie par les passagers est faible. Tous les développements proposés s'appuient naturellement en amont sur un travail de modélisation (recherche du modèle juste nécessaire), et de bibliographie conséquent. Le modèle retenu comprend 5 degrés de libertés. Nous avons démontré qu'il possédait la propriété intéressante d'être plat, et avons utilisé cette propriété pour ouvrir des perspectives relatives à la conception d'un régulateur non-linéaire robuste, susceptible apriori d'accroître les performances dans le cas de " grands mouvements ". Au contraire de ce qui existe dans la littérature,le régulateur multivariable conçu pour le système SDTC permet le contrôle coordonné des actions sur les systèmes STC et DTC.
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Livres sur le sujet "Tilting vehicle"

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Tang, Chen, et Amir Khajepour. Narrow Tilting Vehicles. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-031-01501-4.

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Tang, Chen, et Amir Khajepour. Narrow Tilting Vehicles : Mechanism, Dynamics, and Control. Springer International Publishing AG, 2019.

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Tang, Chen, et Amir Khajepour. Narrow Tilting Vehicles : Mechanism, Dynamics, and Control. Morgan & Claypool Publishers, 2019.

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Tang, Chen, et Amir Khajepour. Narrow Tilting Vehicles : Mechanism, Dynamics, and Control. Morgan & Claypool Publishers, 2019.

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Narrow Tilting Vehicles : Mechanism, Dynamics, and Control. Morgan & Claypool Publishers, 2019.

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Chapitres de livres sur le sujet "Tilting vehicle"

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Das, Shuvra. « Tilting Vehicle Dynamics ». Dans Narrow Tilting Vehicles, 15–28. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-031-01501-4_3.

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Das, Shuvra. « Tilting Vehicle Control ». Dans Narrow Tilting Vehicles, 29–63. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-031-01501-4_4.

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Tüske, István, et György Hegedűs. « Investigation of Tilting Table with Parallel Kinematic ». Dans Vehicle and Automotive Engineering 4, 151–56. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15211-5_13.

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Lehmkuhl, Tom, et Lutz Eckstein. « Designing and Assessing the Driving Experience of a Tilting Vehicle ». Dans Proceedings, 141–55. Berlin, Heidelberg : Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-63193-5_10.

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Dennig, Hans-Jörg, Adrian Burri et Philipp Ganz. « BICAR—Urban Light Electric Vehicle ». Dans Small Electric Vehicles, 157–66. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65843-4_12.

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AbstractThis paper describes the technical features of the light electric vehicle (L2e-category) named BICAR. This specially designed vehicle is an all-in-one emissions-free micro-mobility solution providing a cost-effective and sustainable mobility system while supporting the transition towards a low carbon society (smart and sustainable city concept). The BICAR represents part of a multimodal system, complementing public transport with comfort and safety, relieving inner-city congestion and solving the “first and last mile” issue. The BICAR is the lightest and smallest three-wheel vehicle with weather protection. Due to the space-saving design, six to nine BICARS will fit into a single standard parking space. Safety is increased by an elevated driving position and a tilting mechanism when cornering. The BICAR achieves a range of 40–60 km depending on the battery package configuration in urban transport at a speed of 45 km/h. It features a luggage storage place and exchangeable, rechargeable batteries. The BICAR can be driven without a helmet thanks to the safety belt system, which is engineered for street approved tests. The BICAR has an integrated telematic box connected to the vehicle electronics and communicating with the dedicated mobile application, through which the BICAR can be geo-localised, reserved, locked/unlocked and remotely maintained.
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Das, Shuvra. « Urban Vehicles and Narrow Tilting Vehicles ». Dans Narrow Tilting Vehicles, 1–5. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-031-01501-4_1.

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Das, Shuvra. « Conclusions ». Dans Narrow Tilting Vehicles, 65. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-031-01501-4_5.

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Das, Shuvra. « Tilting Mechanisms and Actuators ». Dans Narrow Tilting Vehicles, 7–14. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-031-01501-4_2.

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Yu, Huangchao, Junqi Lu, Jialong Gao, Su Cao, Li Yu et Lizhen Wu. « Conceptual Design and Test of a Tilting Quadrotor Morphing Unmanned Aerial Vehicle with Adaptive Foldable Wings ». Dans Proceedings of 2021 International Conference on Autonomous Unmanned Systems (ICAUS 2021), 945–54. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9492-9_93.

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Haraguchi, Tetsunori, Tetsuya Kaneko et Ichiro Kageyama. « Comparison of FWS and RWS for Personal Mobility Vehicle (PMV) with Active Tilting Mechanism on Obstacle Avoidance ». Dans Lecture Notes in Mechanical Engineering, 1090–101. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-07305-2_101.

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Actes de conférences sur le sujet "Tilting vehicle"

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Drew, Benjamin, Matt Barker, Kevin Edge, Jos Darling et Geraint Owen. « Experimental Evaluation of a Hydraulically Actuated Tilt System for a Narrow Track Three-Wheeled Vehicle ». Dans ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14606.

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The objective of the EU-funded CLEVER Project (Compact Low Emission VEhicle for uRban transport) is the design and development of a novel two-seat vehicle for individual urban transport providing car-like levels of comfort, safety and convenience with the lower emissions, noise levels and road footprints of motorcycles. A narrow three-wheeled tilting vehicle has been identified as the best method of achieving these goals. One problem with vehicles with a narrow track is the unstable roll moment created when cornering. To solve this issue, the vehicle's centre of gravity is moved towards the centre of the corner by tilting the vehicle in a similar manner to that of a motorcycle. An active tilting system using hydraulic actuation has been employed, allowing for car-like controls. A prototype vehicle has been built to test this active tilting system. Initial testing revealed that while basic steady state handling was good, transient response required improvement. The evidence indicating this poor response is examined, and the necessary methods employed within the control system to solve the issue are discussed. Improved results are presented following an increase in the system gain. The effects of different filter cutoff frequencies on the objective and subjective vehicle handling characteristics is also investigated and presented here. It is shown that when designing a three-wheeled tilting vehicle with the arrangement used in CLEVER, safe handling can only be achieved at the expense of fast tilt response. This is a result of fundamental limitations of the vehicle design.
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Robertson, James W., Jos Darling et Andrew R. Plummer. « Path Following Performance of Narrow Tilting Vehicles Equipped With Active Steering ». Dans ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82164.

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Narrow Tilting Vehicles offer an opportunity to reduce both traffic congestion and carbon emissions by having a small road footprint, low weight, and a small frontal area. Their narrow width requires that they tilt into corners to maintain stability; this may be achieved by means of an automated tilting system. Automated tilt control systems can be classed as Steering Tilt Control (STC) in which active control of the front wheel steer angle is used to maintain stability, Direct Tilt Control (DTC) in which some form of actuator is used to exert a moment between the tilting part(s) of the vehicle and a non-tilting base, or a combination of the two (SDTC). Combined SDTC systems have the potential to offer improved performance as, unlike STC systems, they are effective at low speeds whilst offering superior transient roll stability to DTC systems. However, alterations to the front wheel steer angle made by STC and SDTC systems may result in unwanted deviations from the driver’s intended path. This paper uses multi-body simulations of a three-wheeled Narrow Tilting Vehicle performing an emergency lane change manoeuvre to show that the path followed by a SDTC equipped vehicle in response to a given series of steer inputs differs significantly from that followed by a DTC equipped vehicle. It is also shown that by using a revised series of steer inputs, a vehicle equipped with SDTC is able to successfully follow a similar path to one equipped with DTC, and that the roll stability of the vehicle is not unduly compromised. Finally, the influence of higher DTC system gains on the SDTC system is considered. It is shown that the result is a small improvement in the vehicle’s path following response at the expense of a small reduction in vehicle roll stability.
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Sindha, Jigneshsinh, Basab Chakraborty et Debashish Chakravarty. « Simulation Based Trajectory Analysis for the Tilt Controlled High Speed Narrow Track Three Wheeler Vehicle ». Dans ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85087.

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Small sized three wheeler electric vehicles (EVs) are gaining popularity in many developing countries because of its low cost operation and excellent manoeuvrability. However, usage of such a 3Ws usage is limited to low speed application such as last mile public transport. Vehicles with such configuration are not well accepted for personal mobility. If the safe speed of such a vehicles are improved, such a vehicles can also become viable to personal transport. Active tilt control (ATC) systems are seen as one of the possible solution to improve safe speed of narrow track 3Ws.Literature indicates that many attempts have been made for establishing active tilt control system on 3W vehicles for enhancing stability of ATC vehicles and promising results were obtained. This paper presents simulation based analysis of the ATC 3W electric vehicle. This work is part of full scale experimental prototype development for the narrow track ATC 3W vehicle with one wheel in front configuration. The primarily focus of this work is to address vehicle dynamics and trajectory related issue of the tilting 3Ws. A multi-body model of ATC 3W vehicle using single track lateral dynamic model with nonlinear tire characteristics was prepared in SimMechanics. The lateral dynamic outputs in terms of the trajectory followed by vehicle were compared for the constant steering inputs given to non-tilting vehicle, tilting vehicle with direct tilt control (DTC) system and tilting vehicle with Steering direct tilt control (SDTC) system. Two critical driving scenarios of U-turn and Lane change manoeuvre are analyzed. It is observed from the results that there is certain trade-off in selecting a tilt actuator and controller so as to minimize the jerks in the perceived acceleration due to high gain and minimize the tilt angle error to ensure proper stability improvement. It is also identified that the controller must be tuned to the predictable trajectory control, in addition to the main task of reducing the load transfer across the rear wheel axle. The model presented in the paper is used to understand the performance of DTC and SDTC control strategies during potentially dangerous manoeuvres. The desired path following ability of the vehicle is the main measures considered for the analysis.
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Claveau, F., Ph Chevrel et L. Mourad. « Non-linear control of a Narrow Tilting Vehicle ». Dans 2014 IEEE International Conference on Systems, Man and Cybernetics - SMC. IEEE, 2014. http://dx.doi.org/10.1109/smc.2014.6974300.

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Marquis, Brian, Robert Greif et Erik Curtis. « Effect of Cant Deficiency on Rail Vehicle Performance ». Dans ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85101.

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Simplified train models are analyzed to assess the relationship of unbalance on carbody acceleration and wheel unloading during steady state curving motion. In this paper a half-car model appropriate for both power cars and tilting coach cars is theoretically analyzed. Models of this type are useful for examining static lean requirements as well as margins of safety at higher cant deficiencies in the Track Safety Standards of the Federal Railroad Administration (FRA). The suspension systems modeled and analyzed include the following types: rigid, flexible, tilting actuation, and combined flexible and tilting actuation suspension. Simplified formulas are derived which can be used as an analysis tool by railroad designers to assess vehicle performance. Parametric results are presented for vertical wheel unloading and lateral carbody acceleration as a function of cant deficiency. Results show that incorporation of tilting systems, better suspension designs and better track quality, are necessary in order to provide an equivalent level of margin of safety for operations at higher cant deficiency. The relationship of these results to limits in the Track Safety Standards is discussed.
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Vieira, Rodrigo de Souza, Rafael Sangoi Padilha, Lauro Cesar Nicolazzi et Nestor Roqueiro. « Modeling and analysis of dynamic behavior of tilting vehicle ». Dans SAE Brasil 2007 Congress and Exhibit. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2007. http://dx.doi.org/10.4271/2007-01-2869.

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Khvostov, Denis, Sergey Chepinskiy, Alexandr Krasnov, Ksenia Khvostova et Grigory Shmigelsky. « Design of failover micro aerial vehicle with tilting rotors ». Dans 2016 8th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT). IEEE, 2016. http://dx.doi.org/10.1109/icumt.2016.7765385.

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Pardeshi, Mahesh J., Ravindra Rajhans, M. Srinivas, Shailesh Patil et Gautam Pingle. « Design for Cabin Tilting System Employing Single Torsion Bar Using Taguchi Optimization Method ». Dans SAE 2012 Commercial Vehicle Engineering Congress. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2012. http://dx.doi.org/10.4271/2012-01-2032.

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Cossalter, Vittore, Alberto Doria et Marco Ferrari. « Potentialities of a Light Three-Wheeled Vehicle for Sustainable Mobility ». Dans ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70048.

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Electric and hybrid vehicles with narrow track are very suited to sustainable urban mobility. A particular tilting three-wheeled vehicle has been developed at Padova University. It is composed of a tilting front module (one wheel) and a non-tilting rear module (two wheels). The lower part of the front module is connected to the upper part of the rear module by means of four revolute joints and two rockers. Therefore, the two modules of the vehicle and the two rockers make a four-bar linkage. A specific code for kinematic, dynamic and electric analysis of this vehicle has been developed, with the aim of showing the effects of linkage set-up and mass distribution on the handling and stability characteristics. Some numerical results are presented. This particular three-wheeled vehicle is well suited both to advanced electric and hybrid propulsion systems. A section of this paper shows the characteristics of an electric version for fast urban mobility, that is named E-Snake. The performances of E-Snake were assessed by means of many road tests and were confirmed when it participated in Formula Electric and Hybrid Italy: in 2008 E-Snake was the winner of its category. The last section of the paper deals with Hy-Snake, a new version of the three-wheeled vehicle for sustainable urban and sub-urban mobility. The principal feature of Hy-Snake is the series hybrid propulsion system. Some numerical results show the effectiveness of the integration between mechanical and electrical design. The propulsion system gives good performances and a proper set-up of the four-bar linkage makes the vehicle stable and easy to ride.
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Bertoluzzo, Manuele, Giuseppe Buja, Vittore Cossalter, Alberto Doria et Diego Mazzaro. « Electric tilting 3-wheel vehicle for a sustainable urban mobility ». Dans 2008 10th IEEE International Workshop on Advanced Motion Control (AMC). IEEE, 2008. http://dx.doi.org/10.1109/amc.2008.4516162.

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