Accession Number:

ADA162518

Title:

Incorporation of Active Elements into the Articulated Total Body Model.

Descriptive Note:

Final rept. 26 Sep 83-30 Jun 85,

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF INDUSTRIAL AND MANAGEMENT SYSTEMS ENGINEERING

Personal Author(s):

Report Date:

1985-06-30

Pagination or Media Count:

113.0

Abstract:

The Articulated Total Body ATB Model, based on rigid-body dynamics with Euler equations of motion and Lagrange type constraints, is used by the Harry G. Armstrong Aerospace Medical Research Laboratory to predict the forces and motions experienced by air crew personnel in typical flight operations. To provide a more realistic representation of human dynamics, active neuromusculature was added to the ATB Model using elements of the newly developed advanced harness system. A lumped three-parameter muscle model with a contractile element, a damping element and a parallel elastic element was developed. The contractile element included a length-tension relationship, a force-velocity relationship and an active state function. The basic fiber mechanisms were integrated into muscle systems utilizing motor unit organization, orderly recruitment of motor units and adjustments in force due to fatigue and reflex action. The complete muscle systems were then used to replicate the human neuromusculature of the trunk and neck and for the elbow, shoulder, hip and knee joints.

Subject Categories:

  • Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE