Determining and Optimization of Mass, Stiffness and Damping Coefficients of Tractor Seat by Quasi-Newton Method Using Coupled Human-Seat Model

Reduction of seat to head transmissibility function in seated human body during driving has been the subject of research for many years. Many mathematical models for seated human body during driving has proposed. In the present study a model with four degrees of freedom is considered to optimize seat to head transmissibility function under harmonic excitation with 50 mm amplitude in agricultural vehicles. Optimized coefficients of mass, stiffness and damping for seat were obtained by quasi-Newton optimization method. The theoretical results were compared with the experimental results reported by other researches. A significant reduction in transmitted acceleration and therefore transmitted force to human body and seat to head transmissibility function were concluded by the above method.