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Chengkai Dai

5 accepted papers

2026

From Prompts to Printable Models: Support-Effective 3D Generation via Offset Direct Preference Optimization

RA-L 2026

Current text-to-3D models prioritize visual fidelity but often neglect physical fabricability, resulting in geometries requiring excessive support structures. This paper introduces SEG (<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><u>S</u>upport-<

Cited by 0SourceScholar
2019

Energy-Efficient Coverage Path Planning for General Terrain Surfaces

RA-L 2019

This letter tackles the problem of energy-efficient coverage path planning for exploring general surfaces by an autonomous vehicle. Efficient algorithms are developed to generate paths on freeform 3-D surfaces according to a special design pattern as height extremity aware Fermat spiral for this pur

Cited by 46SourceScholar
2017

RoboFDM: A robotic system for support-free fabrication using FDM

ICRA 2017poster

This paper presents a robotic system - RoboFDM that targets at printing 3D models without support-structures, which is considered as the major restriction to the flexibility of 3D printing. The hardware of RoboFDM consists of a robotic arm providing 6-DOF motion to the platform of material accumulat…

Cited by 199SourceScholar
2016

Steering micro-robotic swarm by dynamic actuating fields

ICRA 2016

We present a general solution for steering microrobotic swarm by dynamic actuating fields. In our approach, the motion of micro-robots is controlled by changing the actuating direction of a field applied to them. The time-series sequence of actuating field's directions can be computed automatically.

Cited by 7SourceScholar
2015

Photometric Stereo With Near Point Lighting: A Solution by Mesh Deformation

CVPR 2015poster

We tackle the problem of photometric stereo under near point lighting in this paper. Different from the conventional formulation of photometric stereo that assumes parallel lighting, photometric stereo under the near point lighting condition is a nonlinear problem as the local surface normals are co…

Cited by 62SourcePDFScholar