A model and comparison of 4-wheel-drive fixed-chassis tractor rollover during Phase I

Baker, Virginia; Guzzomi, Andrew

doi:10.1016/j.biosystemseng.2013.07.016

Cited by 25 publications

(19 citation statements)

References 10 publications

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“…the distance corresponding to the scenario in which the CoG projection is on the baseline border (Type II instability; Figure 3). In this case, the instability of each part (Type I instability) is also evaluated by checking if the projection of the front and rear centres of mass fall inside or outside the proper stability triangle [13,14,9]. …”

Section: The Stability Simulatormentioning

confidence: 99%

“…For example, the use of the energetic approach in [12] allowed to analyse the different initial rollover conditions of tractors and to evaluate the energy available at rollover start. However, the most recent works analysing the stability of agricultural machines [13,5,9,14] use an analytical-Newtonian approach combined with a kineto-static approach based on rigid bodies: the rollover initiation angle of conventional farm tractors fitted with front-axle pivot is studied in [13] while the articulated tractors are treated in [14,5]. The approach followed in the kinematic description of these two types of tractors is basically the same: a first (anterior) body groups the front axle and wheels and a second (posterior) body the remaining part of the machine and the rear wheels.…”

Section: Introductionmentioning

confidence: 99%

“…The present work uses an approach similar to [13,5,9,14] for the calculation of the stability of a vehicle and deals with articulated farm tractors, i.e. wheeled agricultural tractors having a central joint used for steering [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A parametric approach for evaluating the stability of agricultural tractors using implements during side-slope activities

Bietresato¹,

Carabin²,

Vidoni³

et al. 2015

ces

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A parametric approach for evaluating the stability of agricultural tractors using implements during side-slope activities / Bietresato, M.; Carabin, G.; Vidoni, R.; Mazzetto, F.; Gasparetto, A.. -In: CONTEMPORARY ENGINEERING SCIENCES. -ISSN 1313-ISSN -6569. -8:28(2015, pp. 1289-1309. OriginalA parametric approach for evaluating the stability of agricultural tractors using implements during side-slope activities 1290Marco Bietresato et al. AbstractA methodological approach for evaluating a priori the stability of agricultural vehicles equipped with different mounted implements and operating on sloping hillsides is shown here. It uses a Matlab simulator in its first phase and, subsequently, the Response Surface Modelling (RSM) to evaluate the coefficients of a set of regression equations able to account for the Type-I and Type-II stability of the whole vehicle (tractor + implement with known dimensions and mass). The regression equations can give reliable punctual numeric estimations of the minimum value of the Roll Stability Index (RSI) and can verify the existence of a Type-I equilibrium without the need of using the simulator or knowing any detail about the model implemented in it. The same equations can also be used to generate many intuitive graphs ("equilibrium maps") useful to verify quickly the possible overturning of the vehicle. A case-study concerning a 4-wheel drive articulated tractor is then presented to show the potential of the approach and how using its tools. The tractor has been studied in three scenarios, differing on where the implement has to be connected to the tractor (1: frontally; 2: frontally-laterally; 3: in the back). After performing a series of simulations, a set of polynomial models (with 6 independent variables) has been created and verified. Then, these models were used, together with the related equilibrium maps, to predict the stability of 8 implements for scenario 1, 7 implements for scenario 2, and 3 implements for scenario 3, evidencing in particular the danger of using a lateral shredder with a mass greater than 245 kg. The proposed approach and its main outcomes (i.e., the regression equations and the equilibrium maps) can give an effective contribution to the preventive safety of the tractor driver, so it could be useful to integrate it in the homologation procedures for every agricultural vehicle and to include the resulting documentation within the tractor logbook.

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Section: The Stability Simulatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A parametric approach for evaluating the stability of agricultural tractors using implements during side-slope activities

Bietresato¹,

Carabin²,

Vidoni³

et al. 2015

ces

View full text Add to dashboard Cite

show abstract

“…As highlighted in other studies focused on the stability of wheeled non-articulated systems with a 2-DoF steering joint (Baker & Guzzomi, 2013;Guzzomi, 2012;Scarlett et al, 2006), the second DoF of the central joint (roll) is directly involved in the overall stability. Therefore, it is necessary to consider not only the footprint given by the four wheels and the related quadrilateral stability polygon of the vehicle (type II instability), but also the position of the joint.…”

Section: Wheeled Articulated Systemsmentioning

confidence: 95%

Evaluation and stability comparison of different vehicle configurations for robotic agricultural operations on side-slopes

Vidoni

Bietresato

Gasparetto

et al. 2015

Biosystems Engineering

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“…Pioneering investigations on the mechanism of tractor rollover have established fundamental theories explaining how a tractor behaves under certain ground conditions. The mathematical models thus generated further provide the basic concepts of consideration for tractors in dynamic, static, and quasi-static states [2][3][4][5][6][7][8][9][10][11][12][13][14][15] . Indicators of tractor stability obtained from mathematical models provide a simple way of describing vehicle stability.…”

Section: Introduction mentioning

confidence: 99%

Factorial significance on tractor stability under variation of terrain roughness employing the Taguchi method

Zhu

Qin

et al. 2018

International Journal of Agricultural and Biological Engineering

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Tractor rollover accidents remain an issue with the development of agricultural mechanization. Adopting the scale-model-based experimental approach, this study investigated the three most influential geometric factors of tractor in various agricultural ground conditions with improved configuration of force sensing system. The initiation of tractor rollover, associated with the tire-ground contact status, was investigated for various front tire types, ballast weights, and rear track widths. Employing the Taguchi method, the ground reaction forces applied to the tractor's uphill wheels were measured and evaluated using stability indicators. By taking this approach, the effects and statistical significance of the three factors and their interactions were examined under various agricultural ground conditions. Results showed that the ballast weight significantly affected the ground contact status of the uphill front tire. The significance of the front tire type gradually increased as the road roughness increased, but dramatically decreased for an extremely rough road surface. Furthermore, none of the factors or interactions, except the factor of the rear track width for relatively rough roads, was statistically significant. The study revealed that not all commonly discussed factors consistently affect tractor stability. The results of the present study are thus expected to provide a reference explaining how to explore the necessity and feasibility of parameter adjustment before reconfiguring a tractor for higher stability. Citation: Li Z, Zhu Z X, Qin J H, Mao E R, Mitsuoka M, Inoue E, et al. Factorial significance on tractor stability under variation of terrain roughness employing the Taguchi method. Int J Agric & Biol Eng, 2018; 11(5): 88-94.

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A model and comparison of 4-wheel-drive fixed-chassis tractor rollover during Phase I

Cited by 25 publications

References 10 publications

A parametric approach for evaluating the stability of agricultural tractors using implements during side-slope activities

A parametric approach for evaluating the stability of agricultural tractors using implements during side-slope activities

Evaluation and stability comparison of different vehicle configurations for robotic agricultural operations on side-slopes

Factorial significance on tractor stability under variation of terrain roughness employing the Taguchi method

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