Conceptual Cab Suspension System for a Self-propelled Agricultural Machine—Part 2: Operator Comfort Optimisation

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

doi:10.1016/j.biosystemseng.2004.08.007

Cited by 26 publications

(14 citation statements)

References 9 publications

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“…With traditional rubber mounts, the weighted RMS values of the vertical driver's seat and cab's pitch vibrations are quite great, which can make the driver tired and uncomfortable [34]; however, those of cab's roll vibration are relatively small, and these results are similarly the basis of measurements and simulations results by Kordestani et al and Quynh [12,17]. In addition, the weighted RMS values of the vertical driver's seat, cab's pitch, and roll vibrations with hydraulic mounts are, respectively, decreased by 32.48%, 26.31%, and 63.03% in comparison with traditional rubber mounts and by 13.11%, 16.24%, and 1.42% in comparison with pneumatic mounts. Thus, the driver's ride comfort can be clearly improved by using the hydraulic mounts.…”

Section: The Weighted Rms Acceleration Responsessupporting

confidence: 70%

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Vibration Analysis and Modeling of an Off‐Road Vibratory Roller Equipped with Three Different Cab’s Isolation Mounts

Nguyen

Zhang

et al. 2018

Shock and Vibration

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This study proposes a dynamic model of the vibratory roller interacting with the off-road deformed terrain to analyze the lowfrequency performance of three different cab's isolation mounts under the different operating conditions. In order to evaluate the ride comfort of the vibratory roller with the different cab's isolation mounts, a three-dimensional nonlinear dynamic model is established. The power spectral density (PSD) and the weighted root mean square (RMS) of acceleration responses of the vertical driver's seat, cab's pitch, and roll vibrations are chosen as objective functions in the low-frequency range. Contrastive analysis of low-frequency vibration characteristics of the vibratory roller with the traditional rubber mounts, the hydraulic mounts, and the pneumatic mounts is carried out. Experimental investigations are also used to verify the accuracy of models. The research results show that the hydraulic mounts have an obvious effect on mitigating the cab vibration and improving the ride comfort in comparison with the traditional rubber mounts and the pneumatic mounts.

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Section: The Weighted Rms Acceleration Responsessupporting

confidence: 70%

“…Furthermore, vibrations in the low-frequency range of 0.5-10 Hz caused by terrain roughness can lead to the main risk factors which seriously affect the driver's mental and physical health [15,16]. Consequently, cab's isolation mounts are one of the most important factors to improve the driver's ride comfort.…”

Section: Introductionmentioning

confidence: 99%

Vibration Analysis and Modeling of an Off‐Road Vibratory Roller Equipped with Three Different Cab’s Isolation Mounts

Nguyen

Zhang

et al. 2018

Shock and Vibration

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show abstract

“…One of the important factors for vehicle suspension design was to consider the specific vibration frequency of the suspension system to avoid the resonance of the suspension system under the excitation frequency of the road surface [6,7,10]. Some studies of the ride comfort of the vehicle in the frequency domain had shown that the ride quality of the vehicle and durability of the suspension structures were greatly affected in the frequency range below 10 Hz, especially in the low-frequency range from 0.5-4 Hz [14,15]. To reduce the impact of the resonant in the low-frequency region, the specific vibration frequency of the suspension system should be calculated and designed in a range below 2.5 Hz [16].…”

Section: Introductionmentioning

confidence: 99%

Low-frequency vibration analysis of heavy vehicle suspension system under various operating conditions

Le¹,

Nguyen²,

Jiao³

et al. 2020

Math. models, eng.

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To evaluate the acceleration-frequency characteristics of the suspension system of the heavy vehicles, a nonlinear dynamic model of two-axle heavy vehicles is established. A calculation method based on the complex domain is applied to solve the vibration equations of the heavy vehicle in the frequency domain instead of the traditional time domain. Matlab software is then used to calculate the vibration equations under various operating conditions. The research results show that the resonant frequency of the suspension system is not affected by the vehicle speed and the road surface, while it is clearly influenced by the weight of the vehicle and the stiffness of the suspension system. However, the acceleration-frequency characteristics of the vertical vehicle body, pitching vehicle body, and vertical front/read axles are greatly influenced under various operating conditions, especially at the high speed 30 m.s-1 , a wavelength of the road surface 6 m, and 80 % of the vehicle load.

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“…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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Conceptual Cab Suspension System for a Self-propelled Agricultural Machine—Part 2: Operator Comfort Optimisation

Cited by 26 publications

References 9 publications

Vibration Analysis and Modeling of an Off‐Road Vibratory Roller Equipped with Three Different Cab’s Isolation Mounts

Vibration Analysis and Modeling of an Off‐Road Vibratory Roller Equipped with Three Different Cab’s Isolation Mounts

Low-frequency vibration analysis of heavy vehicle suspension system under various operating conditions

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

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