Constrained Trajectory Generation and Control for a 9-Axis Micromachining Center With Four Redundant Axes
Why this work is in the frame
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Bibliographic record
Abstract
A control strategy and trajectory generation algorithm for a novel 9-axis micromachining center is presented. The micromachining center consists of a 3-axis gantry type micromill and a six degree of freedom magnetic rotary table. The micromill is modeled as a rigid body and controlled with a sliding mode controller and feedfoward friction compensator. The rotary table is modeled as a rigid body with flexible connections and controlled using a combination of notch filters, loop shaping controllers, and integrators. To improve the performance of the micromill, the tracking error of the micromill is sent as reference commands to the rotary table. The trajectory generation algorithm consists of a kinematic module and a feedrate optimizer. The kinematic module resolves the redundancies of the 9-axis micromachine while respecting the stroke limits and avoids singularities. The generated position commands by the kinematic module are optimized without violating the physical limits of the drives. A two dimensional contouring experiment has been carried out to validate the improved tracking error performance of the proposed strategy. A freeform surface has been machined to demonstrate the overall performance of the 9-axis machine tool.
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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 | 0.001 | 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 it