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Unformatted text preview: 1/28/2010 1 Loads and Motion in the Musculoskeletal System Outline Basic Concepts Static Analysis of the Skeletal System The Musculoskeletal Dynamics Problem Joint Stability Basic Concepts: Bones Rigid Frameworks Motion of elements Deformable Bodies Structural behaviors Basic Concepts: Joints Articulating versus deformable Spherical versus hinge Basic Concepts: Muscles and Tendons Convert chemical energy to mechanical work Basic Concepts: Ligaments and Joint Capsules Nonlinear Springs 1/28/2010 2 Basic Concepts: Link Dynamics Models Choose models based on the goal of analysis Static Quasi-static Dynamics Rigid body Mechanics Rigid Body Model Elements Anatomic Element Model Element Bone of limb segment Joints Muscles + tendons Nerves Ligaments Rigid links Standard joints: spherical, revolute Rigid contact surfaces Deformable contact surfaces (spine) Actuators + elastic + viscous element Controllers Elastic or viscoelastic springs Static Analysis of the Skeletal System Static Analysis where- Link number j and k - force or moment on link i- force number j on segment number i- pure moment (force couple)- moment of around a ref. point on searound a ref....
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- Spring '10