Accession Number:

ADA453760

Title:

Languages, Behaviors, Hybrid Architectures and Motion Control

Descriptive Note:

Research paper

Corporate Author:

MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH

Report Date:

1997-01-01

Pagination or Media Count:

30.0

Abstract:

In this paper, the authors put forth a framework that integrates features of reactive planning models with modern control-theory-based approaches to motion control of robots. They introduce a motion description language, MDLe, that provides a formal basis for robot programming using behaviors, and at the same time permits incorporation of kinematic and dynamic models of robots given in the form of differential equations. In particular, behaviors for robots are formalized in terms of kinetic state machines, a motion description language, and the interaction of the kinetic state machine with real-time information from limited range sensors. This formalization allows them to create a mathematical basis for the study of such systems, including techniques for integrating sets of behaviors. In addition, they suggest optimality criteria for comparing both atomic and compound behaviors in various environments. They demonstrate the use of MDLe in the area of motion planning for nonholonomic robots. Such models impose limitations on stabilization via smooth feedback. Piecing together open loop and closed loop trajectories becomes essential in these circumstances, and MDLe enables one to describe such piecing together in a systematic manner. A reactive planner using the formalism of the paper is described. The authors also demonstrate obstacle avoidance with limited range sensors as a test of this planner.

Subject Categories:

  • Computer Programming and Software
  • Cybernetics
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE