Multibody simulation of a tracked vehicle with deformable ground contact model
01 Mar 2019-Vol. 233, Iss: 1, pp 146441931878429
TL;DR: A new compact modelling of the tracks–soil interaction is presented and soil mechanics laws for terrain response are implemented and the main hypothesis is that the terrain deformation could be in a narrow zone affected by the vehicle.
Abstract: In this paper, the realisation of a multibody model of a tracked machine is described. A new compact modelling of the tracks–soil interaction is presented and soil mechanics laws for terrain respon...
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01 Jan 2016
TL;DR: The multibody systems approach to vehicle dynamics is universally compatible with any devices to read and it is available in the digital library an online access to it is set as public so you can get it instantly.
Abstract: multibody systems approach to vehicle dynamics is available in our digital library an online access to it is set as public so you can get it instantly. Our books collection hosts in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Merely said, the multibody systems approach to vehicle dynamics is universally compatible with any devices to read.
76 citations
TL;DR: A novel, real-time capable, deformable terrain/soil model that can interact with the mechanics of a multibody system model and the dynamics of a hydraulics model is introduced.
Abstract: A real-time multibody model of an off-road vehicle can be used to analyze the dynamics of tasks, such as loading and/or transferring material from deformable ground. This analysis requires an accurate description of the mechanics, hydraulic actuators, and the terrain. The objective of this paper is to introduce a novel, real-time capable, deformable terrain/soil model that can interact with the mechanics of a multibody system model and the dynamics of a hydraulics model. To this end, a tractor is modeled by using a semi-recursive multibody formulation based on velocity transformation. The hydraulic actuation of the tractor's front-loader is modeled by using the lumped fluid theory. The tractor loads and transfers sand material from a deformable sand field (the ground), which is modeled by combining mesh-based and particle-based soil representation approaches for the real-time simulation of soil deformation. The work cycle of the tractor model follows a 3D maneuver that is used to load and transfer sand material. During the digging and dumping operations, the static sand field is converted into sand particles and vice versa respectively. For the presented work cycle, the real-time capability of the system is analyzed and determined. Furthermore, the dynamic actuator forces in the hydraulic cylinders are compared with the static actuator forces. The introduced real-time capable tractor simulation model can be utilized in product development and other product processes.
23 citations
Cites background from "Multibody simulation of a tracked v..."
...However, the soil models in these studies [11]–[14] were unsuitable for real-time applications....
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...[11] studied a multibody model of a small-sized tracked farming vehicle on two different types of soil: sand and compact agricultural terrain....
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TL;DR: In this article, a real-time multibody model is used in the design of a novel heads-up display unit of a tractor, which includes elements such as tachometer, speedometer, roll inclinometer, gear indicator, fuel gauge, bucket height, tilt, and weight indicators.
Abstract: The concept of heads-up display can be used to provide augmented information onto the windshield of a tractor. The objective of this paper is to introduce a detailed real-time multibody model that is used in the design of a novel heads-up display unit of a tractor. To this end, a tractor is described using a multibody dynamics approach. A heads-up display unit is designed using a series of tasks that are associated with sets of logical conditions and instructions. These conditions and instructions, in turn, determine/design the analog and digital gauges. The gauges are linked with the virtual sensors installed at a number of locations on the tractor. In this study, the heads-up display unit includes elements, such as tachometer, speedometer, roll inclinometer, gear indicator, fuel gauge, and bucket height, tilt, and weight indicators. The effectiveness of the heads-up display unit is determined based on a goal of moving a certain amount of sand from one place to another. The results demonstrate the utility of the heads-up display unit.
12 citations
01 Mar 2020
TL;DR: In this paper, a flexible road wheel with hub-hinge-ring combined structure is introduced to improve buffer damping performance and lightweight level of tracked vehicles to balance computational efficiencies.
Abstract: A novel flexible road wheel with hub-hinge-ring combined structure is introduced to improve the buffer damping performance and lightweight level of tracked vehicles. To balance computational effici...
10 citations
Additional excerpts
...Bu 1⁄4 u ð3Þ Substituting equation (3) in s 1⁄4 u 1⁄4 1 2 ....
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01 Feb 2021
TL;DR: The main goal was to obtain a comparison between the numerical and experimental results, in order to validate of the numerical tool and to better understand the sport gesture.
Abstract: In this paper it is presented a brief introduction about the Micro ElectroMechanical Systems (MEMS) sensors technology and their application and use in healthcare and sport activity in the literature. In these two fields, our research group’s applications will then be analyzed with the support of a numerical tool able to replicate human body behavior performing a sport activity, in particular Nordic Walking and Alpine Skiing. The main goal was to obtain a comparison between the numerical and experimental results, in order to validate of the numerical tool and to better understand the sport gesture. The integrated monitoring systems enable a new interpretation of the sport gesture providing the athletes the maximum freedom of movement and allowing them to better perform in their natural training environment.
8 citations
Cites background from "Multibody simulation of a tracked v..."
...Usually, a multibody analysis is considered when studying complex mechanisms and vehicle dynamics on different ground conditions [13, 14, 15] but are also used to replicate the human body motions in different context like the cross country ski [16], the alpine ski [17] or to study a human fall [18]....
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References
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Book•
01 Jan 1961
332 citations
Book•
01 Jan 1962
TL;DR: Field measurements and analytical models as a basis of test stand simulation of the turning resistance of tracked vehicles and a theoretical analysis of steerability of tracked Vehicles.
Abstract: Field measurements and analytical models as a basis of test stand simulation of the turning resistance of tracked vehicles " , A theoretical analysis of steerability of tracked vehicles " , An analysis of horizontal plane motion of tracked vehicles " ,
242 citations
TL;DR: In this paper, a survey of the most used models for wheeled vehicles in off-road applications is presented, focusing on the models that have made a significant contribution in advancement of techniques for characterizing soil, tire, soil-tire interaction, experimental analysis, model parameterization and model validation.
107 citations
01 Oct 1984
TL;DR: In this paper, an analytical framework for predicting the ground pressure distribution and tractive performance of tracked vehicles is presented, which takes into account all major design parameters of the vehicle as well as the pressure, sinkage and shearing characteristics and the response to repetitive loading of the terrain.
Abstract: An analytical framework for predicting the ground pressure distribution and tractive performance of tracked vehicles is presented. It takes into account all major design parameters of the vehicle as well as the pressure—sinkage and shearing characteristics and the response to repetitive loading of the terrain. The subsequent substantiation of the analytical method by means of full-scale tests made with an instrumented vehicle is described. A comparison between the theoretical prediction and test results is made and it is found that there is a fairly close agreement between them. This paper includes three sections: (i) an analytical method for predicting the normal pressure distribution; (ii) an analytical method for predicting the shear stress distribution and tractive performance; (iii) experimental substantiation of the analytical framework by means of full-scale tests. The analytical framework presented is suitable for evaluating the effects of vehicle design parameters and terrain conditions on the pe...
88 citations
TL;DR: In this article, a three-dimensional multi-body simulation model for simulating the dynamic behavior of tracked off-road vehicles was developed using the LMS-DADS simulation program.
86 citations