Improving model of crawler robot Servosila "Engineer" for simulation in ROS/Gazebo

Crawler robots are popular in tasks of urban search and rescue. Because of using tracks most of these robots have good traversability on rough terrains. For creating and testing these abilities and crawler robot itself often used simulators, which could help to reconstruct most of the conditions and environment without any difficulties. And this is a reason why most of the robots must have its sim...