FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4313509627> ?p ?o ?g. }

• W4313509627 abstract "Traversing granular regolith, especially in reduced gravity environments, remains a potential challenge for wheeled rovers. Mitigating hazards for planetary exploration rovers requires testing in representative environments, but direct Earth-based testing fails to account for the effect of reduced gravity on the soil itself. Granular scaling laws (GSL) have been proposed in the literature to predict performance of a larger wheel based on tests with a smaller wheel, or to predict performance in one gravity level based on tests in another gravity level. Recent experimental results by the authors suggest that GSL offers an accurate and conservative method for predicting wheel performance in reduced gravity based on 1-g experiments, at least in cohesionless soil. For cohesive soils, an additional constraint has been proposed in the literature stating that the radius ratio must be the inverse of the gravity ratio. For example, to predict wheel performance in lunar-g based on 1-g tests, the wheel radius in 1-g must be 1/6 of the wheel radius in lunar-g (since the gravity on Earth is 6× higher than lunar gravity). To date, this has only been validated using numerical simulations. This work considers this proposed GSL cohesion constraint for lunar regolith, which is estimated to be mildly cohesive (0.1–1 kPa). Testing a 1/6-scaled lunar rover may not be practical or desirable, so the error introduced by ignoring this cohesion constraint should be quantified. To evaluate this cohesion constraint, preliminary experiments have been performed measuring performance of single wheels of different radii driving through the lunar soil simulant LMS-1, which has cohesion similar to the estimated cohesion of lunar regolith. Results obtained using these wheels will later be compared to experiments with a larger wheel on parabolic flights producing effective lunar gravity. The two wheels tested in 1-g have radii equal to 1/6 and 1/2 of the radius of the wheel that will be flown in lunar-g. Applying GSL to preliminary results from these two wheels, dimensionless drawbar pull (i.e., net traction), sinkage, and power draw were calculated. Since tests with the 1/6-radius wheel followed the cohesion constraint and tests with the 1/2-radius wheel did not, the error introduced by ignoring this constraint can be estimated based on the difference between the dimensionless results from tests with each wheel. Results were similar (i.e., not statistically significantly different) for the two wheels, which suggests that ignoring the cohesion constraint may not have a significant effect for the low levels of cohesion present in lunar regolith. However, drawbar pull was negative for both wheels at all slips tested, indicating that the thrust generated by the wheel was lower than the resistance. Future experiments will be performed in different conditions that generate positive drawbar pull to make a more conclusive comparison, in addition to the planned lunar-g experiments." @default.
• W4313509627 created "2023-01-06" @default.
• W4313509627 creator A5030799297 @default.
• W4313509627 creator A5085681015 @default.
• W4313509627 date "2023-01-05" @default.
• W4313509627 modified "2023-09-23" @default.
• W4313509627 title "Experimentally Evaluating Granular Scaling Laws for Predicting Lunar-Gravity Wheel Performance in Cohesive Regolith" @default.
• W4313509627 cites W1488265171 @default.
• W4313509627 cites W1974461875 @default.
• W4313509627 cites W1984505364 @default.
• W4313509627 cites W2011990933 @default.
• W4313509627 cites W2023016915 @default.
• W4313509627 cites W2032852313 @default.
• W4313509627 cites W2066100036 @default.
• W4313509627 cites W2068507348 @default.
• W4313509627 cites W2076760870 @default.
• W4313509627 cites W2082770918 @default.
• W4313509627 cites W2091648317 @default.
• W4313509627 cites W2131808000 @default.
• W4313509627 cites W2510090841 @default.
• W4313509627 cites W2565639535 @default.
• W4313509627 cites W2603193537 @default.
• W4313509627 cites W2932069330 @default.
• W4313509627 cites W2941580829 @default.
• W4313509627 cites W3002305901 @default.
• W4313509627 cites W3031923123 @default.
• W4313509627 cites W3037706100 @default.
• W4313509627 cites W3093407331 @default.
• W4313509627 cites W3094653601 @default.
• W4313509627 cites W3211275531 @default.
• W4313509627 cites W2082557167 @default.
• W4313509627 doi "https://doi.org/10.1061/9780784484470.004" @default.
• W4313509627 hasPublicationYear "2023" @default.
• W4313509627 type Work @default.
• W4313509627 citedByCount "0" @default.
• W4313509627 crossrefType "proceedings-article" @default.
• W4313509627 hasAuthorship W4313509627A5030799297 @default.
• W4313509627 hasAuthorship W4313509627A5085681015 @default.
• W4313509627 hasConcept C104054115 @default.
• W4313509627 hasConcept C121332964 @default.
• W4313509627 hasConcept C127313418 @default.
• W4313509627 hasConcept C127413603 @default.
• W4313509627 hasConcept C13280743 @default.
• W4313509627 hasConcept C146978453 @default.
• W4313509627 hasConcept C176809094 @default.
• W4313509627 hasConcept C187320778 @default.
• W4313509627 hasConcept C2776036281 @default.
• W4313509627 hasConcept C41642174 @default.
• W4313509627 hasConcept C62520636 @default.
• W4313509627 hasConcept C78519656 @default.
• W4313509627 hasConcept C87355193 @default.
• W4313509627 hasConceptScore W4313509627C104054115 @default.
• W4313509627 hasConceptScore W4313509627C121332964 @default.
• W4313509627 hasConceptScore W4313509627C127313418 @default.
• W4313509627 hasConceptScore W4313509627C127413603 @default.
• W4313509627 hasConceptScore W4313509627C13280743 @default.
• W4313509627 hasConceptScore W4313509627C146978453 @default.
• W4313509627 hasConceptScore W4313509627C176809094 @default.
• W4313509627 hasConceptScore W4313509627C187320778 @default.
• W4313509627 hasConceptScore W4313509627C2776036281 @default.
• W4313509627 hasConceptScore W4313509627C41642174 @default.
• W4313509627 hasConceptScore W4313509627C62520636 @default.
• W4313509627 hasConceptScore W4313509627C78519656 @default.
• W4313509627 hasConceptScore W4313509627C87355193 @default.
• W4313509627 hasLocation W43135096271 @default.
• W4313509627 hasOpenAccess W4313509627 @default.
• W4313509627 hasPrimaryLocation W43135096271 @default.
• W4313509627 hasRelatedWork W1975647864 @default.
• W4313509627 hasRelatedWork W2052775350 @default.
• W4313509627 hasRelatedWork W2152090701 @default.
• W4313509627 hasRelatedWork W2335517430 @default.
• W4313509627 hasRelatedWork W2551581344 @default.
• W4313509627 hasRelatedWork W2702652441 @default.
• W4313509627 hasRelatedWork W2944137974 @default.
• W4313509627 hasRelatedWork W2995672927 @default.
• W4313509627 hasRelatedWork W3034949602 @default.
• W4313509627 hasRelatedWork W3080200884 @default.
• W4313509627 isParatext "false" @default.
• W4313509627 isRetracted "false" @default.
• W4313509627 workType "article" @default.