Despite the fact that a large number of research studies have been conducted in the field of search
and rescue robotics, significantly little attention has been given to the development of rescue robots
capable of performing physical rescue interventions, including loading and transporting victims to
a safe zone—i.e. casualty extraction tasks. The aim of this study is to develop a mobile rescue robot
that could assist first responders when saving casualties from a danger area by performing a casualty extraction procedure, whilst ensuring that no additional injury is caused by the operation and
no additional lives are put at risk. In this paper, we present a novel design of ResQbot 2.0—a mobile
rescue robot designed for performing the casualty extraction task. This robot is a stretcher-type casualty extraction robot, which is a significantly improved version of the initial proof-of-concept prototype, ResQbot (retrospectively referred to as ResQbot 1.0), that has been developed in our previous work. The proposed designs and development of the mechanical system of ResQbot 2.0, as well
as the method for safely loading a full body casualty onto the robot’s ‘stretcher bed’, are described
in detail based on the conducted literature review, evaluation of our previous work and feedback
provided by medical professionals. To verify the proposed design and the casualty extraction procedure, we perform simulation experiments in Gazebo physics engine simulator. The simulation
results demonstrate the capability of ResQbot 2.0 to successfully carry out safe casualty extractions