Mobile robots is a relatively new research area that is
normally considered from several different perspectives
mainly, engineering and computer science levels. This
paper deals with the engineering level of mobile platforms;
i.e. the physical, hardware and mechatronic levels of mobile
platforms, and presents complete models for the main
hardware components of mobile platforms. The presented
models can be used for simulation and control of mobile
platforms, and they take into account the hardware
limitations, friction force and the topography of the
environment for out door navigation.