Experimental Validation of a Cable-Driven Parallel Robot for 3D Printing Building Construction

Strategic Insights -

Researchers from Sejong University in Seoul, South Korea, have successfully developed and experimentally validated a novel cable-driven parallel robot (CDPR) for 3D printing building construction (3DPBC). Funded by the National Research Foundation of Korea, Ministry of Education and Science Technology, and Ministry of Science & ICT, the system uses five cables to move vertically in synchronization with the building height, ensuring structural interference prevention. The CDPR features a real-time minimum tension distribution algorithm and a sensor fusion position estimation method, combining laser tracker measurements with cable encoder data.

Key Takeaways:

  • The CDPR system was experimentally validated using laboratory experiments involving a scaled two-story building (0.6 m x 0.3 m x 0.6 m), demonstrating precise trajectory tracking with RMS position errors below 1 mm and stable tension control.
  • The system incorporates a real-time minimum tension distribution algorithm and a sensor fusion position estimation method, combining laser tracker measurements with cable encoder data.
  • The integrated system developed by the researchers includes the CDPR, clay extrusion nozzle, and laser tracker, showcasing its potential for precise 3DPBC applications.
  • The research concluded that the proposed approach achieved precise 3DPBC applications, validating its effectiveness.
  • Kwan-Woong Gwak, a researcher from Sejong University, expressed enthusiasm for the project's potential to revolutionize building construction processes.

Statistics:

  • The CDPR system was experimentally validated using a scaled two-story building with dimensions 0.6 m x 0.3 m x 0.6 m.
  • The laboratory experiments demonstrated precise trajectory tracking with RMS position errors below 1 mm.
  • The system achieved stable tension control during the experiments.
  • The research was published in The International Journal of Advanced Manufacturing Technology in 2025.
  • The system was built using five cables, four of which move vertically to prevent structural interference, and a fifth vertical cable that supports the end-effector payload.

Sources:

  • "Experimental Validation of a Cable Driven Parallel Robot for 3d Printing Building Construction." The International Journal of Advanced Manufacturing Technology, 2025.
  • [NewsRx. Investigators at Sejong University Detail Findings in Robotics (Experimental Validation of a Cable Driven Parallel Robot for 3d Printing Building Construction). Journal of Engineering. October 20, 2025; p 1238.]
  • Sejong University, Department of Mechanical Engineering, Seoul, South Korea
  • Springer London Ltd, 236 Grays Inn Rd, 6TH Floor, London WC1X 8HL, England