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Novel Mechanically Fully Decoupled Six-Axis Force-Moment Sensor.

Chyi-Yeu Lin1,2,3, Anton Royanto Ahmad1, Getnet Ayele Kebede1

  • 1Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.

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|January 16, 2020
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Summary
This summary is machine-generated.

A novel six-axis force/moment (F/M) sensor with a unique ring structure and decoupling mechanisms was developed. This innovative sensor significantly reduces cross-talk errors, outperforming existing force sensors.

Keywords:
cross beamcross-talkmechanical decouplingsix-axis force/moment sensorstrain gauges

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Area of Science:

  • Mechanical Engineering
  • Sensor Technology
  • Robotics

Background:

  • Accurate measurement of forces and moments is crucial in various engineering applications.
  • Existing six-axis force/moment (F/M) sensors often suffer from cross-talk errors due to structural interconnections.
  • Minimizing cross-talk is essential for enhancing the precision and reliability of F/M sensing.

Purpose of the Study:

  • To develop a novel six-axis force/moment (F/M) sensor with a unique ring structure.
  • To achieve complete decoupling of force and moment measurements through specialized mechanisms.
  • To minimize cross-talk errors and improve overall sensor performance.

Main Methods:

  • Design and fabrication of a novel ring structure with cross-beam elastic bodies.
  • Integration of sliding and rotating mechanisms for structural decoupling.
  • Theoretical analysis using Timoshenko beam theory and validation via finite element analysis (FEA).
  • Experimental testing to quantify cross-talk errors under various loading conditions.

Main Results:

  • The developed sensor successfully measures forces (Fx, Fy, Fz) and moments (Mx, My, Mz).
  • Mathematical models, idealizations, and the mechanical decoupling principle were detailed.
  • FEA simulations validated the theoretical strain analysis.
  • Maximum cross-talk errors were experimentally determined to be below 2.63% for all six axes.

Conclusions:

  • The novel six-axis F/M sensor demonstrates significantly improved cross-talk error performance.
  • The unique ring structure and decoupling mechanisms are effective in minimizing measurement interference.
  • This sensor offers a promising solution for applications requiring high-precision force and moment sensing.