title: Distribution of forces between synergistics and antagonistics muscles using an optimization criterion depending on muscle contraction behavior.
abstract: In this paper, a new neuromusculoskeletal simulation strategy is proposed. It is based on a cascade control approach with an inner muscular-force control loop and an outer joint-position control loop. The originality of the work is located in the optimization criterion used to distribute forces between synergistic and antagonistic muscles. The cost function and the inequality constraints depend on an estimation of the muscle fiber length and its time derivative. The advantages of a such criterion are exposed by theoretical analysis and numerical tests. The simulation model used in the numerical tests consists in an anthropomorphic arm model composed by two joints and six muscles. Each muscle is modeled as a second-order dynamical system including activation and contraction dynamics. Contraction dynamics is represented using a classical Hill's model.
authors.affiliation: Institut de Recherche en Communications et Cybernetique de Nantes UMR 6597, Ecole Centrale de Nantes, Universite de Nantes, 1 de la Noe, 44321 Nantes, France. carlos.rengifo@irccyn.ec-nantes.fr
authors.forename: Carlos
authors.initials: C
authors.lastname: Rengifo
authors.forename: Yannick
authors.initials: Y
authors.lastname: Aoustin
authors.forename: Franck
authors.initials: F
authors.lastname: Plestan
authors.forename: Christine
authors.initials: C
authors.lastname: Chevallereau
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology; D003198:Computer Simulation; D006801:Humans; D008954:Models, Biological; D009119:Muscle Contraction / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D004856:Postural Balance / Q000502:physiology*; D013314:Stress, Mechanical