In context
Planetary exploration increasingly relies on rotorcraft for surface reconnaissance, but landing on low-gravity, dense-atmosphere bodies like Saturn's moon Titan poses severe collision risks. Conventional drones lack adequate protection against impact-induced propeller damage, motivating research into novel crashworthy configurations.
What was reported
Researchers proposed a rotor-type robot with a six-bar tensegrity structure as an anti-collision shell. They constructed a mathematical model using node, connectivity, and vector matrices, and performed nonlinear finite element analysis with an equilibrium matrix method to account for geometric nonlinearity and slack cables.
Collision simulations in ABAQUS, using HyperMesh meshing, evaluated drops and impacts at various speeds. Results showed the robot can withstand a maximum drop height of 23.7 m, contacting the surface with a closed triangular face, while protecting its propellers. It also survived impacts on the rotor bar at speeds up to 7 m/s.
A prototype was built and tested under static and dynamic loads, confirming the configuration's effectiveness for unexpected landing scenarios on Titan.
Why it mattered
This work addresses a critical gap in planetary rotorcraft safety, offering a lightweight structural solution that could enable more robust landings and repeated takeoffs in extreme environments, potentially informing future missions beyond Titan.
The anti-collision capability of the rotor-type robot in this study covers unexpected situations that may be encountered during normal landing operations.
Source: 《机器人》期刊 (robot.sia.cn) · Published 2025-11-19 · “旋翼式星表探测六杆张拉整体机器人非线性力学建模及碰撞仿真分析”