Vertical Suspension Seat Transmissibility and SEAT Values for Seated Person Exposed to Whole-body Vibration in Agricultural Tractor Preliminary Study

Adam, S. Aisyah; Jalil, Nawal Aswan Abdul

doi:10.1016/j.proeng.2017.03.070

Cited by 50 publications

(29 citation statements)

References 3 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%

“…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. In addition, some researchers measured the vertical vibration accelerations of the front axles, rear axles, and cabin for the two-wheel-drive tractor under different road conditions and forward speeds [17][18][19].…”

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

“…The vibration transmissibility and dynamic responses are evaluated. In the study conducted by Aisyah et al [21], the suspensions seat transmissibility and seat effective amplitude transmissibility values for a seated human body exposed to vibration in tractor are investigated. Optimization based on genetic algorithms is used by Baumal et al [22] to design and control an active suspension system.…”

Section: Introductionmentioning

confidence: 99%

Control of Electric Wheelchair Suspension System based on Biodynamic Response of Seated Human Body

Saghafi

Hosseinabadi

Khomarian

2020

IJE

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Electric wheelchair is one of the equipment to be used by the incapacitated and disable people. Constant exposure to vibration affects human comfort and health. Reducing the vibrations transmitted to the human body is important in the electric wheelchair design and becomes a healthcare industry demand. This paper deals with the study on vibration control of the electric wheelchair suspension system. A generalized model of the electric wheelchair suspension, including the biodynamic model of seated human body is presented. In order to achieve optimal suspension performance, an active control for wheelchair suspension is designed based on H-infinity control criterion. Numerical simulations are carried out to demonstrate the effectiveness of the proposed wheelchair suspension system. The simulation results show that the proposed control system can effectively attenuate the vibration amplitude and improve the wheelchair suspension performance. This control system could be used for electric wheelchair design and assist with improving human comfort.

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“…El dolor lumbar es un importante problema de salud pública [27], encontrándose entre los que más costos generan para la sociedad en general [28]; la magnitud y la duración de la exposición a la vibración [29], son algunos de los factores que ocasionan esos dolores [30], por lo que los conductores de equipos como los tractores, que son utilizados durante muchas horas al día por los agricultores [31], se exponen a ese tipo de daño.…”

Section: Introductionunclassified

Exposición ocupacional a ruido y vibraciones en cuerpo entero en agricultores de la Zona Norte de Cartago, Costa Rica

Araya-Solano

Villalobos-Rodríguez

2020

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Como parte de las actividades que se realizan en el sector agrícola se hace uso de vehículos, por lo que se tiene contacto con diferentes agentes físicos como el ruido y las vibraciones de cuerpo entero, debido a esto el objetivo de este proyecto fue determinar la exposición ocupacional a estos agentes durante el uso del tractor, específicamente en labores realizadas en la Zona Norte de Cartago, Costa Rica. Para alcanzar dicho objetivo, se efectuó un estudio exploratorio en 13 fincas, en las cuales se cuantificaron los valores de exposición a ambos agentes, haciendo uso de un vibrómetro y audiodosímetros. Como resultado, se obtuvo que los niveles de exposición diaria a vibraciones se encuentran sobre el valor de acción en el 53,8% de los casos, y los resultados del nivel sonoro continuo equivalente (NSCE) se ubican entre los 54,8dB(A) a 75,4 dB(A), por lo que no sobrepasan el nivel de exposición ocupacional. Además, se identificaron los factores de riesgo relacionados con estos agentes, la antigüedad de la maquinaria y dispositivos colocados en el vehículo, así como los factores personales que pueden influir en la aparición de dolencias, relacionadas con la actividad laboral. Existen otros factores de riesgo en la población en estudio, asociados a las posturas adoptadas y al índice de masa corporal de los colaboradores. Se concluye que la exposición a las vibraciones en cuerpo entero, podría llegar a generar efectos a la salud a largo plazo, además, el dispositivo de acople y modelo se convierten en factores que pueden influir en la exposición.

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Vertical Suspension Seat Transmissibility and SEAT Values for Seated Person Exposed to Whole-body Vibration in Agricultural Tractor Preliminary Study

Cited by 50 publications

References 3 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

Control of Electric Wheelchair Suspension System based on Biodynamic Response of Seated Human Body

Exposición ocupacional a ruido y vibraciones en cuerpo entero en agricultores de la Zona Norte de Cartago, Costa Rica

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