Active Human Response to a Vibration Environment

Human computer models built with LifeMOD and MSC Adams can be developed to predict human subsystem vibration frequencies for a particular environment, a particular posture and particular interface configuration between the human and the environment. Computer models can also provide detailed information on the joint and muscle forces during the episode as well. By studying an active human model, or one which responds in an active way to the environment, information can be provided on human reaction and vibration adaptation or shielding. In this study, a multi-axis vibration environment for an off-road heavy vehicle is examined using an active human model. Data for motion of the platform, the seat, and the body segments human test subject is collected using a video-based motion tracking system and used to develop a human model which responds to the vibration environment. The model is used to provide insight on human internal reactions, segment vibration frequencies and human adaptation to the vibration environment.