Colorado State University engineers propose tensegrity robots for alien worlds

Researchers at Colorado State University‘s Adaptive Robotics Lab developed the Tensegrity-based Continuum Robot (TeCoBot), described in a recent Nature Machine Intelligence paper, for planetary terrain exploration, Universe Today reported Nov. 13, 2026.

Universe Today reported that TeCoBot measures 587 mm long and weighs 600 grams. Its body consists of four stacked icosahedral tensegrity modules that form a continuous flexible backbone.

Universe Today reported that the modules create the central structural element of the robot, while each module contains rods suspended inside a stretchy lattice that supports deformation without rigid joints. Each module is built around six lightweight rods suspended inside a 3D printed stretchy lattice.

Universe Today reported that the rods and lattice together implement the tensegrity architecture that replaces conventional hinges with a floating tension network throughout the robot’s body. Three cables carrying 40-lb braided fishing wire pass through the robot’s center. Small motors at the base pull on the cables so the robot can bend without relying on heavy metal hinges.

Pulling all three cables at once makes TeCoBot scrunch to about half its original length, Universe Today reported. This variable shape change demonstrates the continuum motion enabled by the cable-driven design, which the press release compared to an elephant’s trunk.

Universe Today reported that the claws on either end are swappable. One version uses soft padding for delicate cargo handling. Another is a heavier duty gripper that uses a worm gear to clamp onto another gripper without draining battery power. This modularity lets the same robot platform handle different tasks by changing the end effector, with the worm gear design maintaining grip passively.

Universe Today reported that a stand-alone TeCoBot can inch along like a caterpillar, roll sideways, and climb vertically. These locomotive modes show the robot can move across varied terrain without wheels. Wheeled and rotor-based robots suit flat terrain but have difficulty with jagged boulders and tight crevices. This limitation motivates engineers to develop alternative robotic form factors, leading to the tensegrity continuum robot concept described in the CSU paper.

TeCoBot exhibits embodied intelligence, Universe Today said: its frame yields when bumped or when it strikes an object, and the robot adjusts without needing a whole control system to adjust for the new environment. Embodied intelligence reduces the computational burden of environmental interaction because the mechanical structure itself absorbs unexpected contacts rather than requiring sensor-driven corrections.

Universe Today reported that three TeCoBots can link claws to grab each other and self-assemble into many different shapes. The paper describes robots wrapping around a pipe and forming an H-shaped walker for tight spaces. Three TeCoBots are also capable of teaming up to clean off a table. Table cleaning is presented as a terrestrial demonstration of teamwork, while the space-relevant examples include pipe wrapping and H-shaped walking through confined areas.

Universe Today reported that the researchers propose modularity and adaptability would help in lunar craters and Martian underground caverns. The article links these capabilities to lunar and Martian environments where wheeled rovers face mobility limits, positioning adaptability as valuable for subsurface and crater exploration.

Universe Today reported on a snake robot designed to explore those exact locations. This concept seems like a step-up in functionality from that. The snake robot reference provides a prior point of comparison for lunar craters and Martian caverns, suggesting the tensegrity concept offers expanded capabilities over existing soft robot approaches.

Universe Today explained that tensegrity is a design principle that blends tension and integrity. Buckminster Fuller helped popularize it in the mid-20th century, and it originated in architecture rather than robotics. Its core mechanism relies on rigid rods pushing outward against elastic cables pulling inward.

Universe Today reported that NASA has studied tensegrity for more than ten years. Engineers have especially examined SUPERball, a spherical cage meant to survive high-speed landings without parachutes by spreading impact forces through cables. SUPERball demonstrates that tensegrity has already been considered for surviving hard landings by distributing forces through cables rather than relying on traditional descent systems.

Universe Today reported that engineers currently have to manually control the bots via a WiFi connection. That arrangement is not easy on deep space missions because real-time manual control is impractical due to distance and latency. The WiFi requirement is a current operational constraint that must be addressed before deployment on other worlds.

Universe Today reported that engineers plan to install faster motors and add swarm intelligence so dozens of modules can band together. If these improvements proceed as planned, the researchers envision elephant trunk styled robots serving as intrepid deep space explorers through cooperative swarm behavior.