Impact Dynamics and Parametric Study of the Contact Event for Biped Robots
Bibliographic record
Abstract
In this paper, the impact dynamics and its effects on the contact event of a five-link biped walking on level ground are studied. The dynamic equations of both single and double impact of the biped are derived using the Newtonian approach. We improved the conventional five-link biped kinematic model such that, for the first time, the explicit solutions of the external impulses and post impact angular velocities are presented in detailed but compact form. These solutions are used conveniently to evaluate the conditions that warrant each individual type of impact. A parametric study is performed to correlate the type of impact with certain gait parameters and the results are presented in graphical form in the parameter space. Effects of variations in the parameters on the vertical impulse and post impact velocity of the trailing tip are further investigated. The ratio of the vertical and horizontal impulses is also examined, which shows the likelihood of slippage of the foot (feet). This work reveals important physical insights into the mechanisms of biped impact and facilitates motion planning and motion regulation of biped locomotion with prescribed contact phases.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".