Development of a simplified method for evaluating agricultural tractor’s operator whole body vibration

Cutini, Maurizio; Costa, Corrado; Bisaglia, C.

doi:10.1016/j.jterra.2015.11.001

Cited by 41 publications

(33 citation statements)

References 17 publications

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“…e site map and the test rig are demonstrated in Figure 6. e test rig system includes support frame (1), acceleration sensor (2), weight plate (3), rings (4), tire (5), rope (6), beam (7), linear bearing beam (8), displacement sensor (9), holder of sensor (10), suction plate (11), suspension bracket of magnetic lifter (12), magnetic lifter (13), ground (14), tire connection plate (15), linear bearing (16), and guide rods (17).…”

Section: Derivation Procedures Of Model Parametersmentioning

confidence: 99%

“…In the aspect of the experimental approach, Clijmans et al [14] used the experimental modal analysis technique to predict the structural behaviour of the machine under a set of excitation conditions. When studying the effects of vibration on drivers, Cutini et al [15] operated three agricultural tractors on six test tracks at different forward speeds to evaluate the whole body vibration of the agricultural tractor's operator. Adam and Jalil [16] performed measurements on a healthy male tractor driver to determine the vertical suspension seat transmissibility and SEAT values.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of the Vibration Characteristics for Agricultural Wheeled Tractor with Implement and Front Axle Hydropneumatic Suspension

Zheng

Cui

Yang

et al. 2019

Shock and Vibration

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The dynamic model is significant for the analysis of the vibrational characteristics of the wheeled tractor system with implement and front axle hydropneumatic suspension. In this work, the nonlinear stiffness and damping equations are derived first. The dynamic coupling relationship among cabin, three-point hitch structure, and implement are figured out, and the dynamic model of the half agricultural wheeled tractor/implement system is presented considering the effects of three-point hitch structure, passive silent blocks of cabin, and front axle hydropneumatic suspension together. To validate the model, the power spectral densities (PSDs) of the driver seat, cabin, chassis, and implement acquired from numerical simulations are compared with those from experiments, respectively. Under different forward speeds, two groups of results match well. Based on the model, the influences of passive cabin suspension, implement, and front axle hydropneumatic suspension on the dynamical characteristics of the tractor system are investigated. Results indicate that the front axle hydropneumatic suspension will deteriorate the ride comfort of the driver but improve the handing stability. The passive cabin suspension reduces the operational stability while improving much more ride comfort than the front axle hydropneumatic suspension does. The driver’s comfortableness will be increased due to implement; meanwhile, handling stability will be compromised. Besides, the impacts of initial nitrogen volume, pressure of accumulators, and orifice diameter of throttle valves on the vibration characteristics of the tractor system are also inspected.

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Section: Derivation Procedures Of Model Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of the Vibration Characteristics for Agricultural Wheeled Tractor with Implement and Front Axle Hydropneumatic Suspension

Zheng

Cui

Yang

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…On the contrary, the solicitation arising from running the vehicle on ramps seems to be the most promising. A first attempt to validate this hypothesis resulted in the development of three test tracks [68], one for each axis of solicitation (x, y, z), made of specifically designed ramps. Figure 5 shows the ramps developed for the z axis test track (1000 mm long and 50 mm high), whose solicitations on a tractor run at 8 km h −1 ( Figure 5) were compared with those resulting from running the same tractor on field test tracks and an ISO 5008 test track.…”

Section: Developing a Simplified Test Trackmentioning

confidence: 99%

Whole-Body Vibration in Farming: Background Document for Creating a Simplified Procedure to Determine Agricultural Tractor Vibration Comfort

Cutini¹,

Brambilla²,

Bisaglia³

2017

Agriculture

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Operator exposure to high levels of whole-body vibration (WBV) presents risks to health and safety and it is reported to worsen or even cause back injuries. Work activities resulting in operator exposure to whole-body vibration have a common onset in off-road work such as farming. Despite the wide variability of agricultural surface profiles, studies have shown that with changing soil profile and tractor speed, the accelerations resulting from ground input present similar spectral trends. While on the one hand such studies confirmed that tractor WBV emission levels are very dependent upon the nature of the operation performed, on the other, irrespective of the wide range of conditions characterizing agricultural operations, they led researchers to set up a possible and realistic simplification and standardization of tractor driver comfort testing activities. The studies presented herewith indicate the usefulness, and the possibility, of developing simplified procedures to determine agricultural tractor vibration comfort. The results obtained could be used effectively to compare tractors of the same category or a given tractor when equipped with different seats, suspension, tyres, etc.

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“…A PLS regression approach was applied (e.g., Wold et al, 2001;Costa et al, 2013;Infantino et al, 2015;Cutini et al, 2016) on the above mentioned datasets. The PLS is a particular type of multivariate regression which uses a two-block predictive PLS model.…”

Section: Multivariate Modellingmentioning

confidence: 99%

An innovative multivariate tool for fuel consumption and costs estimation of agricultural operations

Guerrieri¹,

Fedrizzi²,

Antonucci³

et al. 2017

Span. j. agric. res.

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The estimation of operating costs of agricultural and forestry machineries is a key factor in both planning agricultural policies and farm management. Few works have tried to estimate operating costs and the produced models are normally based on deterministic approaches. Conversely, in the statistical model randomness is present and variable states are not described by unique values, but rather by probability distributions. In this study, for the first time, a multivariate statistical model based on Partial Least Squares (PLS) was adopted to predict the fuel consumption and costs of six agricultural operations such as: ploughing, harrowing, fertilization, sowing, weed control and shredding. The prediction was conducted on two steps: first of all few initial selected parameters (time per surface-area unit, maximum engine power, purchase price of the tractor and purchase price of the operating machinery) were used to estimate the fuel consumption; then the predicted fuel consumption together with the initial parameters were used to estimate the operational costs. Since the obtained models were based on an input dataset very heterogeneous, these resulted to be extremely efficient and so generalizable and robust. In details the results show prediction values in the test with r always ≥ 0.91. Thus, the approach may results extremely useful for both farmers (in terms of economic advantages) and at institutional level (representing an innovative and efficient tool for planning future Rural Development Programmes and the Common Agricultural Policy). In light of these advantages the proposed approach may as well be implemented on a web platform and made available to all the stakeholders.

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Development of a simplified method for evaluating agricultural tractor’s operator whole body vibration

Cited by 41 publications

References 17 publications

Simulation of the Vibration Characteristics for Agricultural Wheeled Tractor with Implement and Front Axle Hydropneumatic Suspension

Simulation of the Vibration Characteristics for Agricultural Wheeled Tractor with Implement and Front Axle Hydropneumatic Suspension

Whole-Body Vibration in Farming: Background Document for Creating a Simplified Procedure to Determine Agricultural Tractor Vibration Comfort

An innovative multivariate tool for fuel consumption and costs estimation of agricultural operations

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