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

Abstract

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.

Performance of PID-Fuzzy control for cab isolation mounts of soil compactors

“…In compaction condition of the soil compactor, under the excitation force of the drum = sin2 on the EPS, the characteristics of the EPS was changed from the low to medium and high-densities [3]. The effect of the medium-density on the ride comfort was researched [1,2,12]. To evaluate the performance of PID-Fuzzy control, two types of the EPS with low and high-densities are chosen to simulate under the excitation drum 28 and 35 Hz at a speed 5 km·h -1 .…”

“…Based on the actual structure of the soil compactor, a nonlinear dynamic model of a single drum vibratory roller with 7DOF is built to evaluate the control performance of the PID-Fuzzy control for cab isolation system equipped with the hydraulic mount (HM) [2,6,11], as plotted in Fig. 1.…”

“…The soil compactor performance was evaluated not only by the compression efficiency of the vibratory drum on the soil, asphalt and other materials but also by the driver's ride comfort [1,2]. Therefore, in order to achieve the maximum excitation force of the vibrator drum, the drum-elastoplastic soil (EPS) interaction models were studied and analyzed [3,4], the research results showed that the compression performance of the soil compactor was maximum at the excitation frequency region from 15-40 Hz of the vibratory drum [5], especially at a low frequency 28.5 Hz and high frequency 33 Hz of the vibratory drum [1,3].…”

“…However, the weighted RMS values of the driver and cab were high under various working conditions, especially the cab shaking. Three cab isolation systems including rubber, hydraulic, and pneumatic mounts to increase the ride comfort were proposed [2]. The research results showed that the driver's rider comfort and the cab shaking were significantly reduced by the cab isolation system used the hydraulic mounts in the low-frequency region.…”

Study to control the cab shaking of vibratory rollers using the horizontal auxiliary damping mount

“…Due to the commercial competition of construction vehicles, especially vibratory rollers, the requirements for vibratory rollers are becoming more and more stringent. The vibratory roller was not only required to improve the compression efficiency but also to ensure the ride comfort of the cab and operator [1][2][3][4]. In the working process of the vehicle, due to the vertical excitation force of the vibrator drum was high, and vibratory rollers mainly worked on the sandy terrains with the low-density, therefore, the vertical vibration of the driver's seat and the cab shaking angle were greatly affected, so the driver's feel was very uncomfortable [1,5].…”