Improved Method for Determining the Height of Center of Gravity of Agricultural Tractors

Kim, Yu Yong; Noh, Jae-Seung; Shin, SeungYeop; Kim, ByoungIn; Hong, SunJung

doi:10.5307/jbe.2016.41.3.170

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…Figure 2 shows the side view of each type of tractor, including the combustion tractor, and their orientation (0, 0 on XZ plane) where contact is made between the front wheel and the ground. The CoG of the combustion tractor was reflected in the 3D model based on a previous study that calculated the CoG with the overall dimensions of the vehicle [46]. This was then verified with the CoG calculation model that the software provided.…”

Section: Arrangement Of the Main Componentsmentioning

confidence: 97%

Enhancing Safety through Optimal Placement of Components in Hydrogen Tractor: Rollover Angle Analysis

Son,

Kim,

Kang

et al. 2024

Agriculture

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Hydrogen tractors are being developed, necessitating consideration of the variation in the center of gravity depending on the arrangement of components such as power packs and cooling modules that replace traditional engines. This study analyzes the effects of component arrangement on stability and rollover angle in hydrogen tractors through simulations and proposes an optimal configuration. Stability is evaluated by analyzing rollover angles in various directions with rotations around the tractor’s midpoint. Based on the analysis of rollover angles for Type 1, Type 2, and Type 3 hydrogen tractors, Type 2 demonstrates superior stability compared to the other types. Specifically, when comparing lateral rollover angles at 0° rotation, Type 2 exhibits a 2% increase over Type 3. Upon rotations at 90° and 180°, Type 2 consistently displays the highest rollover angles, with differences ranging from approximately 6% to 12% compared to the other types. These results indicate that Type 2, with its specific component arrangement, offers the most stable configuration among the three types of tractors. It is confirmed that the rollover angle changes based on component arrangement, with a lower center of gravity resulting in greater stability. These findings serve as a crucial foundation for enhancing stability in the future design and manufacturing phases of hydrogen tractors.

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Section: Arrangement Of the Main Componentsmentioning

confidence: 97%

Enhancing Safety through Optimal Placement of Components in Hydrogen Tractor: Rollover Angle Analysis

Son,

Kim,

Kang

et al. 2024

Agriculture

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“…They evaluated the safety of agricultural machines by developing a mathematical model that can determine the slip according to the slope angle and the coefficient of friction. Kim et al [12] derived the center of gravity of a tractor, which affects lateral overturning, using trigonometric functions and polar coordinate transformation. Kang et al [13] derived a static falling down sidelong angle of a three-wheeled power tiller by experimentation.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Determine Static Falling down Sidelong Angle of Tractor Using a 3D Printed Miniature Model

et al. 2021

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In this study, we have conducted a quasi-static lateral overturning test and derived a static falling down sidelong angle by using a miniature tractor model. We analyzed the lateral overturning condition of tractors theoretically by literature review and derived a method to manufacture a miniature model based on the analysis result. A miniature model was manufactured using a 3D printer at a scale of 1/20, relative to the actual dimension of a tractor. In addition, a test platform was constructed to perform lateral overturning tests. The miniature model was placed on the test platform, and the inclination angle of the ground was gradually increased. Then the static falling down sidelong angle, that is the inclination angle at the moment of lateral overturning occurred, was measured. The test result indicated that the difference of average static falling down sidelong angle was 1.0%. comparing to the accredited certification test result of the original tractor. Therefore, by utilizing the method applied in this study, the static falling down sidelong angle of tractors could be derived quickly and conveniently from a miniature model. As future research, the in-depth verification for the developed method is required by applying to a variety of agricultural machines.

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“…Centre of gravity (CG) and moment of inertia are two crucial parameters in analysing the dynamics and mechanical system of a body [1][2] . Low CG and moment of inertia in the body axis provides a vehicle with high manoeuvrability, as well as satisfactory control and stability [3][4][5] . Inertial properties must be determined precisely as they have imperative effects on vehicle dynamics.…”

Section: Introductionmentioning

confidence: 99%

Heavy Military Land Vehicle Mass Properties Estimation Using Hoisting and Pendulum Motion Method

Risby¹,

Khalis²,

Tan³

et al. 2019

Def. Sc. Jl.

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Mass properties such as the centre of gravity location, moments of inertia, and total mass are of great importance for vehicle stability studies and deployment. Certain parameters are required when these vehicles need to be arranged inside an aircraft for the carrier to achieve proper mass balance and stability during a flight. These parameters are also important for the design and modelling process of vehicle rollover crash studies. In this study, the mass properties of a military armoured vehicle were estimated using hoisting and pendulum method. The gross total weight, longitudinal and vertical measurements were recorded by lifting the vehicle using a mobile crane and the data were used to estimate the centre of gravity. The frequency of vehicle oscillation was measured by applying swing motion with a small angle of the vehicle as it is suspended on air. The centre of gravity and mass moment of inertia were calculated using the vector mechanics approach. The outcomes and limitations of the approach as discussed in details.

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Improved Method for Determining the Height of Center of Gravity of Agricultural Tractors

Cited by 4 publications

References 1 publication

Enhancing Safety through Optimal Placement of Components in Hydrogen Tractor: Rollover Angle Analysis

Enhancing Safety through Optimal Placement of Components in Hydrogen Tractor: Rollover Angle Analysis

A Novel Approach to Determine Static Falling down Sidelong Angle of Tractor Using a 3D Printed Miniature Model

Heavy Military Land Vehicle Mass Properties Estimation Using Hoisting and Pendulum Motion Method

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