Investigating the effect of velocity, inflation pressure, and vertical load on rolling resistance of a radial ply tire

Taghavifar, Hamid; Mardani, Aref

doi:10.1016/j.jterra.2013.01.005

Cited by 108 publications

(72 citation statements)

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“…length and rolling resistance and also contact patch width and rolling resistance are nonlinear and can be better expressed by polynomial (order 2) relationships. Similar results were also obtained by us in a previous study of the correlations between the contact area and rolling resistance (Taghavifar & Mardani, 2013). These correlations can be attributed to the greater contact patch at soil-tire interface under various treatments, resulting in a greater area of soil deformation.…”

Section: Wheel Load-contact Patch Length and Contact Patch Width Relasupporting

confidence: 89%

“…Taghavifar & Mardani (2013) in a previous study investigated the effect of velocity, tire inflation pressure, and wheel load on rolling resistance and found that the effect of forward velocity on rolling resistance is negligible. They also reported that the main contributing factors on rolling resistance are wheel load and tire inflation pressure.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been designed so far to measure experimentally the rolling resistance focusing on the effect of different variables such as wheel load, tire inflation pressure, speed, sinkage, etc. on rolling resistance (Çarman, 2002;Zoz & Grisso, 2003;Way & Kishimoto, 2004;Elwaleed et al, 2006;Coutermarsh, 2007;Kurjenluoma et al, 2009;Taghavifar & Mardani, 2013). Analytical models have also been developed for determination of rolling resistance (Bekker, 1960;Pope, 1971;Wong, 1984;Komandi, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Relationships among the contact patch length and width, the tire deflection and the rolling resistance of a free-running wheel in a soil bin facility

Tomaraee

Mardani

Mohebbi

et al. 2015

Span. j. agric. res.

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<p>Qualitative and quantitative analysis of contact patch length-rolling resistance, contact patch width-rolling resistance and tire deflection-rolling resistance at different wheel load and inflation pressure levels is presented. The experiments were planned in a randomized block design and were conducted in the controlled conditions provided by a soil bin environment utilizing a well-equipped single wheel-tester of Urmia University, Iran. The image processing technique was used for determination of the contact patch length and contact patch width. Analysis of covariance was used to evaluate the correlations. The highest values of contact length and width and tire deflection occurred at the highest wheel load and lowest tire inflation pressure. Contact patch width is a polynomial (order 2) function of wheel load while there is a linear relationship between tire contact length and wheel load as well as between tire deflection and wheel load. Correlations were developed for the evaluation of contact patch length-rolling resistance, contact patch width-rolling resistance and tire deflection-rolling resistance. It is concluded that the variables studied have a significant effect on rolling resistance.</p>

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Section: Wheel Load-contact Patch Length and Contact Patch Width Relasupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relationships among the contact patch length and width, the tire deflection and the rolling resistance of a free-running wheel in a soil bin facility

Tomaraee

Mardani

Mohebbi

et al. 2015

Span. j. agric. res.

Self Cite

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Section: Abstract Matching Agricultural Tractors To Implements Towedmentioning

confidence: 99%

“…Calibration procedures, if listed, generally included a two point calibration linear scale. Other research related tire velocity, inflation pressure, and ballasting (Upadhyaya et al, 1988; Zoz and Grisso, 2003;Taghavifar and Mardani, 2013) to draft forces and tractive efficiency.This research presents a different approach for calibrating an instrumented drawbar and verifying the draft force of a towed implement in a laboratory using The Organisation for Economic Co-operation and Development (OECD) Code 2 test procedures (OECD Code 2, 2016). This research approach also minimized alterations to components supplied with the tractor by using a replacement drawbar for instrumentation, which could be mounted onto multiple tractors of similar size with limited modifications.…”

mentioning

confidence: 99%

Development and Validation of a Tractor Drawbar Force Measurement and Data Acquisition System (DAQ)

Roeber

Pitla²,

Hoy

et al. 2017

Applied Engineering in Agriculture

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ABSTRACT. Matching agricultural tractors to implements towed by the drawbar is one of the important aspects of machinery management for ensuring optimum performance and fuel cost savings. A field deployable tractor draft force measurement and data acquisition system was developed and evaluated as part of this research project. A drawbar instrumented to measure draft force in field operating conditions was developed and statically calibrated. The drawbar was calibrated by applying loads from 4.45 to 134 kN using a hydraulic cylinder connected to a 444.8 kN load cell. Testing was conducted with the drawbar installed on a tractor on a concrete track. The Nebraska Tractor Test Laboratory (NTTL) load car was used for applying draft loads to evaluate the instrumented drawbar. The track test consisted of seven loads corresponding to maximum power in seven gears. The draft forces as measured by the drawbar were compared to the draft measurements recorded by the load car. The error between draft force measurements of the instrumented drawbar and the load car measurements ranged from 0.21 kN (0.27%) to 0.99 kN (2.88%).There were no statistically significant differences between drawbar and load car measurements confirming that the drawbar force measurement and data acquisition (DAQ) system developed as part of this research can be used for field use. Keywords. Data acquisition, Draft load, Drawbar, LabVIEW, Strain gages, Tractor.he tractor drawbar is the most widely used method of towing an implement. An accurate robust method to measure the draft load developed by a towed implement had been a critical industry need for some time. Tractor tests were conducted as far back as 1908 in the Winnipeg Tractor Trials (Ellis, 1913). Some approaches for draft force measurement have included: attaching a strain gage load cell to the drawbar; or a hydraulic cylinder acting as a load cell (used by the Nebraska Tractor Test Laboratory (NTTL) for official drawbar draft measurements until being replaced by load cells in 2011); installing an instrumented drawbar pin (Zoerb et al., 1983); or instrumenting the drawbar itself (Grevis-James and Bloome, 1982). A primary benefit of these types of sensors was to minimize alterations to the tractor components while determining the amount of force generated by a towed implement. Fastening a load cell to the end of the drawbar was discounted, as such a system created a cantilevered load that affected the tractive efforts of the tractor (Zoerb et al., 1983). In addition, the load cell needed to be rigidly mounted to prevent excessive lateral movement during turning or stopping. The result was potential damage to the load cell and the tractor, as well as an unacceptable risk of personal injury to the operator. A design complication of using a load cell that would not pivot was that the load cell would prove less effective in measuring lateral loads as seen in contour or headland operations. Another method of integrating the load cell into the drawbar (proof-ring) was to permanently alter the drawbar w...

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High‐speed mobility on planetary surfaces: A technical review

Rodríguez-Martínez

Winnendael

Yoshida

2019

Journal of Field Robotics

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Despite the success so far accomplished in the robotic exploration of the Moon and Mars, the constraints associated with newly proposed mission concepts manifest the need for a faster surface prospection. Increasing driving velocities is being considered as a potential solution to the requirements introduced by these missions. This review presents the benefits and foreseeable challenges of using faster locomotive solutions for space exploration. Information is provided regarding the set of missions that would benefit most from faster locomotive capabilities. Starting by understanding the theoretical framework governing the interaction of wheeled robots operating over loose, sandy terrains, we delve into the foundation of Bekker's classic terramechanic equations—the most frequently used method to predict mobile robots off‐road performance. We highlight its limitations and review the efforts that have been made to expand the range of application of these theories to dynamic wheel–soil interactions. We analyze the existing experimental evidence on the effects of increasing traveling velocities under earthbound, off‐road conditions. By paying special attention to previous experiences on the lunar surface, we outline the challenges that the combination of irregular terrains and a reduced‐gravity field may pose to a fast‐moving exploration rover. The principles, mathematical models, experimental evidence, and experiences presented in this review are meant to aid in the identification of poorly understood and insufficiently studied aspects regarding high‐speed extraterrestrial surface mobility.

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Investigating the effect of velocity, inflation pressure, and vertical load on rolling resistance of a radial ply tire

Cited by 108 publications

References 10 publications

Relationships among the contact patch length and width, the tire deflection and the rolling resistance of a free-running wheel in a soil bin facility

Relationships among the contact patch length and width, the tire deflection and the rolling resistance of a free-running wheel in a soil bin facility

Development and Validation of a Tractor Drawbar Force Measurement and Data Acquisition System (DAQ)

High‐speed mobility on planetary surfaces: A technical review

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