title: Equivalent linear damping characterization in linear and nonlinear force-stiffness muscle models.
abstract: In the current research, the muscle equivalent linear damping coefficient which is introduced as the force-velocity relation in a muscle model and the corresponding time constant are investigated. In order to reach this goal, a 1D skeletal muscle model was used. Two characterizations of this model using a linear force-stiffness relationship (Hill-type model) and a nonlinear one have been implemented. The OpenSim platform was used for verification of the model. The isometric activation has been used for the simulation. The equivalent linear damping and the time constant of each model were extracted by using the results obtained from the simulation. The results provide a better insight into the characteristics of each model. It is found that the nonlinear models had a response rate closer to the reality compared to the Hill-type models.
authors.affiliation: Mechanical Engineering Department, Faculty of Engineering, University of Tehran, Tehran, Iran. marzieh.ovesy@gmail.com.
authors.forename: Marzieh
authors.initials: M
authors.lastname: Ovesy
authors.affiliation: Mechanical Engineering Department, Faculty of Engineering, University of Tehran, Tehran, Iran.
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Nazari
authors.affiliation: Mechanical Engineering Department, Faculty of Engineering, University of Tehran, Tehran, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Mahdavian
mesh_terms: D006801:Humans; D016014:Linear Models; D008954:Models, Biological; D009119:Muscle Contraction / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D017711:Nonlinear Dynamics
keywords: Hill-type models; Linear damping; Muscle modeling; Time constant