Indexed by:期刊论文

Date of Publication:2015-08-01

Journal:JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME

Included Journals:SCIE

Volume:7

Issue:3

ISSN No.:1942-4302

Key Words:curvature theory; envelope curve; envelope surface; adjoint approach; centrode; axode

Abstract:The curvature theories for envelope curve of a straight line in planar motion and envelope ruled surface of a plane in spatial motion are systematically presented in differential geometry language. Based on adjoint curve and adjoint surface methods as well as quasi-fixed line and quasi-fixed plane conditions, the centrode and axode are taken as two logical starting-points to study kinematic and geometric properties of the envelope curve of a line in two-dimensional motion and the envelope surface of a plane in three-dimensional motion. The analogical Euler-Savary equation of the line and the analogous infinitesimal Burmester theories of the plane are thoroughly revealed. The contact conditions of the plane-envelope and some common surfaces, such as circular and noncircular cylindrical surface, circular conical surface, and involute helicoid are also examined, and then the positions and dimensions of different osculating ruled surfaces are given. Two numerical examples are presented to demonstrate the curvature theories.