Humanoid Robotics and Compliant Actuation

Research project focused on humanoid locomotion, compliant joints and robotic force control.

Overview

This research project was developed within the UN-Robot research group at the National University of Colombia.

The work focused on the design and optimization of compliant robotic mechanisms for humanoid locomotion simulation, combining robotics, biomechanics, finite element analysis and bio-inspired optimization techniques.

The project aimed to improve force control capabilities while reducing energy consumption and increasing mechanical efficiency.

Scientific Context

Humanoid robotics requires the integration of multiple disciplines including:

  • Biomechanics.
  • Dynamic systems.
  • Automatic control.
  • Mechanical design.
  • Optimization.
  • Embedded systems.

One of the major challenges lies in reproducing human locomotion while ensuring robustness, adaptability and efficient energy management.

Main Objectives

The project pursued the following objectives:

  • Design compliant robotic joints.
  • Simulate biped locomotion.
  • Improve force and torque control.
  • Reduce mechanical stress.
  • Optimize actuator performance.
  • Develop efficient robotic prototypes.

Methodology

Axis 1 – Biped Locomotion Modeling

Development of a planar 2R mechanism capable of reproducing key characteristics of human walking.

The objective was to investigate locomotion dynamics and control strategies.

Axis 2 – Compliant Actuation

Design and implementation of:

  • Rotary Series Elastic Actuators (RSEA).
  • Compliant joints.
  • Elastic transmission systems.

These solutions improved force measurement accuracy and mechanical robustness.

Axis 3 – Finite Element Modeling

Finite Element Analysis (FEA) was used to:

  • Validate structural integrity.
  • Optimize mechanical components.
  • Reduce material consumption.
  • Improve manufacturing feasibility.

Axis 4 – Bio-Inspired Optimization

Optimization algorithms inspired by natural systems were investigated, including:

  • Particle Swarm Optimization.
  • Swarm Intelligence methods.
  • Nature-inspired optimization strategies.

These approaches improved both mechanical and energetic performance.

Main Contributions

The project contributed to:

  • Humanoid robotics research.
  • Compliant actuation systems.
  • Biped locomotion simulation.
  • Robotic force control.
  • Structural optimization.
  • Additive manufacturing design.

Scientific Impact

The project strengthened expertise in:

  • Dynamic systems.
  • Nonlinear control.
  • Robotic modeling.
  • Mechanical simulation.
  • Optimization methods.

Many concepts explored during this work later influenced research activities involving dynamic modeling, system diagnosis and complex cyber-physical systems.

Research Outputs

The project resulted in:

  • Robotic prototypes.
  • Finite element models.
  • Optimization methodologies.
  • International conference publications.

Keywords

Humanoid Robotics · Biped Locomotion · Compliant Mechanisms · Series Elastic Actuators · Force Control · Torque Control · Finite Element Analysis · Bio-Inspired Optimization · Robotics

Project Status

Completed

References