Identification of Controls in Neuro-Musculoskeletal Control System Models

摘要

The commonly adopted practice of identifying the myo-actuator torques in neuro-musculoskeletal control systems as the system controls is discussed. It is demonstrated that it leads to biologically unrealistic results. A systems model describing the excitation and contraction dynamics of skeletal muscle is then presented. In this model the control parameters are the actual neural controls, motor unit recruitment and stimulation frequency, and the model correctly predicts experimentally observed muscular force outputs for a wide variety of neural control inputs. A general myocybernetic performance criterion, and certain special cases pertaining to specific contractive modes are also discussed.