https://engineering.princeton.edu/news/2026/04/08/soft-robot-has-no-problem-moving-no-motor-and-no-gears
Article
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Princeton researchers built an origami-inspired soft robot using liquid crystal elastomers
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Robot locomotes via heat-driven phase transitions — no motors, gears, or electronics
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Design inspired by origami folding patterns enabling directional movement
Discussion
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LCEs require 100°C+ and kilovolts in non-thermal variants; impractical for biological use
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Phase-transition actuators broadly criticized: low precision, slow, poor force control
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Wax motors cited as the only practical real-world phase-transition actuator
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Skepticism about recurring soft robot research; “what are these actually used for?”
Discuss on HN
