Conceptual Cab Suspension System for a Self-propelled Agricultural Machine, Part 1: Development of a Linear Mathematical Model

Temmerman, J. De; Deprez, Koen; Anthonis, Jan; Ramón, Herman

doi:10.1016/j.biosystemseng.2004.08.006

Cited by 25 publications

(12 citation statements)

References 6 publications

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“…In addition to the cabin and driver seat suspension [35][36][37], to improve the driver's comfort and the steering response, front axle suspension is always the focus of this research. For the tractor without implement, Martelli et al [38] pointed out the front axle elastic suspension had limited effect on the vertical vibration and driving safety depending on the driving conditions, while its effect on the pitch and lateral vibration is obvious [28].…”

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

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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: 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

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show abstract

“…The damping effect of air-spring suspension is substantially better than that of mechanical spring suspension. Deprez et al [13][14][15][16] established a dynamic model of the six degrees of freedom of an agricultural machinery cab suspension system. A simulation and experiment validation were performed.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on driver seat vibration characteristics of crawler-type combine harvester

Chai

Gao

et al. 2019

International Journal of Agricultural and Biological Engineering

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To improve the driving comfort of combine harvesters, driver seat low-frequency vibration and related driver ride-comfort problems were investigated on a Chinese CFFL-850 crawler-type full-feed combine harvester based on ISO2631. Driver vibration and driving seat transmission characteristics were measured under the following conditions: no-load idling, driving on the road, driving in the field, and simulated harvesting. The root mean square values composite vibration under four conditions were 3.63 m/s 2 , 2.35 m/s 2 , 3.34 m/s 2 , and 2.67 m/s 2 , respectively. For the same condition, the maximum root mean square scores of vibration component on driver whole-body occurred in the seat support surface (test point 1) and vertical direction (Z direction), which were 3.56 m/s 2 , 2.05 m/s 2 , 3.15 m/s 2 , and 2.43 m/s 2 , respectively. The test point 2 to test point 1 vertical-transfer function curve trends were nearly identical. Nearly all of the transfer coefficients were greater than 1 in the range of 1-50 Hz, therefore, the seat vibration attenuation performance was poor. Based on the analysis results, the driver seat structure was altered and a verification test was performed. The test results indicated that after an X-damping mechanism was installed, vibration acceleration, on the surface of the seat support under the road-driving conditions, decreased from 2.35 m/s 2 to 1.68 m/s 2. Under the simulated harvesting condition, the vibration acceleration decreased from 2.56 m/s 2 to 1.46 m/s 2. Nearly all of the seat vertical transfer coefficients were less than 1 within the frequency range of 1-80 Hz, therefore the dynamic comfort of the seat was ameliorated after structural improvement.

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“…In the literature the modeling of agricultural machines has been recently treated and discussed ([2]- [5]). In particular, in [2] a detailed model of the cab suspension system is presented. Whereas in this work a model of the full vehicle vertical dynamics is reported.…”

Section: Introductionmentioning

confidence: 99%

Modeling and identification of vertical dynamics of an agricultural machine

Spelta

Savaresi

Previdi

et al. 2009

2009 IEEE International Conference on Control Applications

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This paper concerns the modeling and identification of the vertical dynamics of an agricultural machine with suspended cabin. The main goal of the model is to provide an instrument for semi-active suspension design in terms of both control laws design and mechanical specifications (mechatronic design). The proposed model is a semiphysical model of the machine. The described identification process is based on a two-stage procedure. First the sub-models of vehicle and cabin are identified. Then the full model is finally computed. The Model is finally validated experimentally. 978-1-4244-4602-5/09/$25.00 ©2009 IEEE

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Conceptual Cab Suspension System for a Self-propelled Agricultural Machine, Part 1: Development of a Linear Mathematical Model

Cited by 25 publications

References 6 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

Experimental study on driver seat vibration characteristics of crawler-type combine harvester

Modeling and identification of vertical dynamics of an agricultural machine

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