Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Drawbar Pull"”.
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Experimental Analysis of the Effects of the Variation of Drawbar Pull Test Parameters for Exploration Vehicles on GRC-1 Lunar Soil Simulant
A drawbar pull (DP) test procedure was developed at the NASA Glenn Research Center (GRC) for testing and developing designs for off-road vehicles. The motivation was to develop a procedure that would produce repeatable results and could be replicated by other researchers. While developing the test …
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Experimental Evaluation and Semi-Empirical Modeling of the Tractive Performance of Rigid and Flexible Wheels on Lunar Soil Simulant
… contact length. For each test the normal load, drawbar pull, and driving torque were measured and recorded for further analysis. To measure the effect of the changes in the wheels' parameters on the contact patch under different loads, a pressure pad was embedded below the surface of the Lunar …
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Empirical Analysis of Pneumatic Tire Friction on Ice
… on a tire, providing directly the data for the drawbar pull of said tire, thus supporting the calculation of friction based on this data. This indoor testing apparatus allows for some degree of replication by helping to maintain test conditions and by imposing a desired tire slip; the normal …
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Experimental Investigation of the Tractive Performance of an Instrumented Off Road Tire in a Soft Soil Terrain
… data to analyze several relations, such as the drawbar pull and the sinkage dependency on slip. The data col-lected indicated that, when looking at the effect of individual parameters, by increasing the soil com-paction, the normal load, and by decreasing the inflation pressure will result in a …
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Modeling, Design, and Assembly of Spring Tires
… compression testing, rough terrain driving, and drawbar pull testing to assess their performance.
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Terrain and Vehicle-Terrain Sensing and Estimation in Real-Time for Use in Autonomous Vehicles
… angle can then be used to further obtain the drawbar pull and the tractive effort. The cameras were experimentally tested and validated using the Terramechanics testing rig at the TMVS laboratory at Virgina Tech. Both single pass and multi-pass scenarios were tested and the results analyzed. …
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Comparative Study of the Effect of Tread Rubber Compound on Tire Performance on Ice
… the effects of the tread rubber compound on the drawbar pull performance of tires in contact with an ice layer near its melting point. A set of sixteen tires of eight different rubber compounds were considered. The tires were identical in design and tread patterns but have different tread rubber …
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Prediction of mobility, handling, and tractive efficiency of wheeled off-road vehicles
… and predicts basic features, such as the drawbar pull, the driving torque and the lateral force, as well as complex behaviors, such as the slip-sinkage phenomenon and the multi-pass effect. The tractive efficiency of different tire-soil configurations is simulated and discussed. To …
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Terramechanics of Saturated Clays: Assessing Tire Performance Through Experimental and Numerical Approaches
… tools capable of accurately predicting drawbar performance and sinkage are useful for path prediction and navigation without the loss of mobility. This thesis focuses on formulating the physics underlying such predictive tools, particularly in the challenging terrain of saturated clays. …