ResearchResearch paperRobotics & Embodied AI1 source · Oct 13, 2026

Sim4RAD: A MATLAB Toolkit for Design-Phase Sizing, Actuator Selection and URDF-Model Verification of Serial Robotic Arms

Actuator sizing is an early and consequential decision: joint torque and velocity specifications fix the motors, gearboxes and brakes before any CAD model exists.

Key points

  • Sim4RAD is a MATLAB toolkit for that phase and for the verification that follows it.
  • Replacing the synthesized model by a URDF file turns the same analyses to verification.
  • A 7-DOF anthropomorphic arm is compared in three layouts differing in the shoulder axis order and in whether the last wrist joint is coaxial with the payload.
  • The same arm needs 20 to 37 times more torque for a 5 m/s target than for a 2 s motion: the scenario, not the trajectory, must be fixed first.

Sources (1)

Extractive summary: sentences quoted from the sources.

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