Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
8
result(s) for
"Automobiles, Three wheel Models."
Sort by:
Build your own land vehicles
\"Solar-powered vehicles, gravity-driven cars, and spring-loaded three-wheelers will get kids on the path to learning. Makerspace-friendly projects with step-by-step illustrations guide them through hands-on science and engineering applications\"-- Provided by publisher.
Book
Modal Analysis of Automobile Wheels based on Lightweight Technology
Compared with traditional wheels, magnesium alloy wheels have the advantages of higher strength, toughness, lighter weight, beautiful appearance and so on. This paper takes magnesium alloy wheel as the research object, and uses Pro/e and ANSYS to help complete a lot of work such as 3D model construction and finite element analysis and calculation, to ensure that the magnesium alloy wheel can meet its strength requirements while being lightweight. The strength analysis and modal analysis of the designed wheel model are carried out under various working conditions. According to the analysis results, the first design model is further simplified, and then the calculation and analysis are repeated many times. It is found that the new model meets the mechanical properties requirements under multi-working conditions, ensures that the requirements of lightweight design are met, and provides relevant theories and methods for wheel design and structural optimization of other materials.
Journal Article
Flexible vibration analysis for car body of high-speed EMU
The resonance of the flexible vibration of car body, which has not been detected before on a passenger coach, occurred recently on a high-speed Electric multi units (EMU) when the train was running at 300 km/h on Beijing-Shanghai line. In this investigation, the force transmission from track to car body via suspensions is elaborated first with possibly induced factors briefly discussed. Both the measurements and experiments in field and in laboratory were conducted to evaluate the resonances and the excitation as well as transmission. Moreover, a three-dimensional railroad vehicle model was built in a computational non-linear Multibody system (MBS) framework, in which the car body flexibility was modeled using Finite element (FE) method. The model was validated and shows good agreements with measurements. Furthermore, the measured wheel and rail profiles were used to analyze the wheel/rail interaction for both new and worn states. The effects of the wheel-rail contact conditions on stabilities, dynamics and riding comforts were also examined. Feasible solutions were promoted to avoid the resonance and following by validating tests. It shows that the high frequency excitation arises from the hunting motion of bogie that closes to the modals of the car body, leads to the resonance of the structure of the car.
Journal Article
THE DESIGN OF A CATAPULT MACHINE
In other words, the exterior structure must have a special geometry and some dedicated features meant to protect the basic structure and interior elements, but also to give the car the ability to damage other vehicles [3]. In other words, the included catapult system benefits from a projectile trajectory variation mechanism, based on changing the position of the launch threshold. In addition to the development of 3D models, the allocation of material was also made with the help of this program. [...]each piece was assigned a material, which led to both changes in textures and colors, as well as the allocation of specific properties, such as density, modulus of elasticity, yield strength, etc. In the case of three separate parts (two guards and a mask) and the large number of movable parts in that area, the structures allocated to the wheels would not have benefited from a proper mounting on one of the fixed components associated with the front axle. [...]there was a risk that the wheel guard would block the maximum stroke of the wheel when cornering.
Journal Article
DESIGN OF A ROVER PROTOTYPE MANUFACTURED BY ADDITIVE TECHNOLOGIES
The most common is the wheel-based system, but you can also find systems such as the legged, wheeled or crawling system. [...]we can have a classification like: * Flow in a tunnel, with vortices as the kinematic principle and hydrodynamic forces as the main resisting force to the movement; * Torsion, with longitudinal vibration as the kinematic principle, and frictional force as the main force resisting movement; * Sliding, with sliding as the kinematic principle and frictional force as the main resisting force to motion; * Running, having as its kinematic principle the oscillatory motion of a pendulum with several joints, and the main force of resistance is the loss of kinetic energy; * Jumping, having as its kinematic principle the oscillatory motion of a pendulum with several joints, and the main resisting force is the loss of kinetic energy; * Walking, with the kinematic principle being the rolling of a polygon, and the main resisting force being gravitational force. The strength of this system is similar to that of any other vehicle, with a chassis at the base, on which the rest of the assemblies and sub-assemblies are placed, such as the locomotive system, engine, bodywork, also providing the necessary strength. 2.2 Classification of rover systems The classification of these types of systems can be done in a branched way, by dividing and classifying the various assemblies found on them [3]. [...]ROVER type systems are classified according to: * Locomotor system: * With legs: \" One leg; \" Two legs; \" Four legs; \" Six legs. * With wheels: \" By number of wheels: * Three wheels; * Four wheels; * Six wheels; * Eight or more wheels. [...]they are adapted to meet the requirements of the harsh environment they are subjected to, such as extreme temperatures and dust. [...]the main elements are: * Chassis; * Body; * Propulsion system; * Steering system; * Communication system. SLA (Stereolithography) * Rapid prototyping technology, widely used in the industrial field to make moulds, models and even functional parts; * It involves using a laser beam with ultraviolet light to solidify a liquid photopolymer resin in the printer's build tank. [...]using software that 'slices' the 3D model into cross-sections, ultraviolet laser light passes through the resin, which solidifies in successive layers resulting in the 3D model; * Materials used: photo-sensitive liquid resins, ceramic materials.
Journal Article
Simulation And Experimental Validation Of Vibro-acoustic Transmission Through A Passive Automotive Door Mount System
Automotive manufacturers are faced with many challenges to meet everincreasing industry standards and satisfy customer demands. Two such requirements are the growing demand for reliable automotive products that can withstand severe dynamic environments as well as the reduction of automotive interior noise levels, which is an important concern in noise, vibration and harshness (NVH) design because of its huge effect as a marketing tool and on the general pleasure of driving. However, anecdotal evidence suggests that, until now, the characterisation of structure-borne door panel vibration and its subsequent noise emission characteristics in terms of its door mount system has not yet been contemplated. Thus, a three-dimensional finite element (FE) model with full coupling between the passenger cabin and vehicle body, to simulate the complex, transient door panel vibration and internal acoustic wave propagation as a function of the door mount system, when provoked by an external impact force, is proposed. With reference to a real door mount system, a discrete, multidegree- of-freedom, time domain numerical model is developed and solved using ABAQUS(R) FE code. An objective function value based on the sound pressure level transmitted to the driver's head position is then computed in order to evaluate the performance of the door mount system. An experimental campaign was thereafter undertaken to validate the numerical model based on time response data. The measured data were compared with the predicted values, the results of which exhibited good correlation.
Journal Article
Matching 2-D Ellipses to 3-D Circles with Application to Vehicle Pose Estimation
Finding the three-dimensional representation of all or a part of a scene from a single two dimensional image is a challenging task. In this paper we propose a method for identifying the pose and location of objects with circular protrusions in three dimensions from a single image and a 3d representation or model of the object of interest. To do this, we present a method for identifying ellipses and their properties quickly and reliably with a novel technique that exploits intensity differences between objects and a geometric technique for matching an ellipse in 2d to a circle in 3d. We apply these techniques to the specific problem of determining the pose and location of vehicles, particularly cars, from a single image. We have achieved excellent pose recovery performance on artificially generated car images and show promising results on real vehicle images. We also make use of the ellipse detection method to identify car wheels from images, with a very high successful match rate.
Paper
Supplier Technologies Could Nix the Steering Wheel and Unleash 360-Degree Stereo Camera Views
(Hitachi Astemo) “When we develop technology, our vision is to have everyone in society benefit from the innovation,” said Harsha Badarinarayan, Hitachi Astemo’s vice president of advanced engineering. SAE Media test drove Hitachi Astemo’s steer-by-wire system on a Honda Civic with a steering wheel and another Civic sedan equipped with the finger-operated device. Hitachi Astemo’s stereo camera system provides automatic calibration during driving to maintain measurement accuracy as well as high-density 3D point cloud generation from disparity information (via artificial intelligence) of each camera pair.
Magazine Article