The purpose of this paper is to describe a method for aiding in the intuitive understanding of the effects of bi-articular muscles on the stiffness of a limb. In particular, a kinematic analysis of a mechanical model of a human arm is performed. The results are manipulated into a form that makes evident a mathematical decomposition of the kinematics. This gives rise to a mechanical analog to the decomposition: an equivalent four-bar linkage with single-joint muscles. Further insight is gained as the equivalent linkage provides an intuitive direction associated with each set of muscles.

Additional Metadata
Conference 2001 ASME International Mechanical Engineering Congress and Exposition
Citation
Russell, D, & English, C.E. (Chad E.). (2001). An equivalent linkage model for understanding stiffness effects of biarticular muscles. Presented at the 2001 ASME International Mechanical Engineering Congress and Exposition.