Modeling and Simulation of Multi-rigid Body Dynamics

Abstract

With the development of computer digital technology, numerical simulation has been regarded as a reliable method to study the kinematics and dynamics of human body. Human modeling and simulation is also becoming a cross-disciplinary research hotspot in ergonomics, computer graphics, biomechanics, rehabilitation engineering, and other disciplines. Simulation and modeling enable us to simplify the complex structure and function of the human body, avoid the attention to human differences, and analyze the main influencing factors and issues of interest. In addition, simulation technology breaks through the limitation of measurement tools, making it easy for us to obtain those parameters that cannot be measured directly or are difficult to be measured effectively. At the same time, the simulation technology realizes the possible damage under special conditions, which deepens our further understanding and research on the mechanism of human body injury. The motor system of human body is a very complex nonlinear system, which needs the joint regulation and coordination of nerve, muscle, and bone. ADAMS (automatic dynamic analysis of mechanical system) simplifies the composition and joints of the human body into a multi-rigid body system, and uses the given mechanical conditions to model and predict the human body's behavior. In this section, taking ADAMS as the platform, we comprehensively and carefully introduce the modeling method and simulation technology of multi-rigid body system dynamics.