A velocity-based impedance control system for a low impact docking mechanism (LIDM)

Area of Science:

• Robotics and Control Systems
• Mechanical Engineering
• Spacecraft Systems

Background:

• Low Impact Docking Mechanisms (LIDMs) are crucial for space missions, requiring precise control to avoid damage.
• Traditional control methods struggle with random position errors during the docking phase.
• Ensuring minimal contact forces and torques is essential for mission success and hardware integrity.

Purpose of the Study:

• To present a novel velocity-based impedance control algorithm for LIDMs.
• To achieve low-impact docking by managing contact forces despite random position errors.
• To investigate the relationship between velocity and contact forces for effective control.

Main Methods:

• Derivation of the governing equation for an impedance controller relating force deviation and velocity.
• Design of simulations using MATLAB and ADAMS software to analyze control characteristics.
• Implementation of a load sensing ring to measure contact forces.

Main Results:

• The impedance control algorithm demonstrated fast response times and excellent robustness against random environmental errors.
• Simulations confirmed that the control algorithm effectively manages contact forces and torques.
• The derived control strategy successfully met low-impact docking requirements.

Conclusions:

• The proposed velocity-based impedance control algorithm is effective for achieving low-impact docking.
• The algorithm's robustness and fast response make it suitable for real-world LIDM applications.
• This approach enhances the safety and reliability of docking operations in dynamic environments.