A Hierarchical Model-Based Control System for Inspection

Published

January 1, 1983

Author(s)

Ted Hopp, K Lay

Abstract

A control system architecture for three-axes coordinate-measuring machines, using hierarchical task-decomposition techniques, is described. This architecture is based on real- time, sensory-interactive control concepts developed at the National Bureau of Standards (NBS). An inspection program consists of a series of high-level goals to be satisfied. Goal are satisfied when specified information has been obtained regarding the part. There is a decision hierarchy, each level of which provides logic for partially decomposing goals into simpler goals. The control system executes the inspection program by interpreting the decision hierarchy logic. The lowest level of the decision hierarchy generates primitive coordinate-measuring machine actions, which are directly executed. A world model hierarchy executing in parallel with the task decomposition hierarchy provides information which aids in the decomposition decisions at each level. The world model is derived from a combination of prior knowledge of the part and observations gathered during inspection. The use of a world model allows an inspection task to adapt to the particular part being inspected.

Proceedings Title

First International Symposium in Automated Integrated Manufacturing

Conference Location

, USA

Pub Type

Conferences

Citation

Hopp, T. and Lay, K. (1983), A Hierarchical Model-Based Control System for Inspection, First International Symposium in Automated Integrated Manufacturing, , USA (Accessed January 22, 2025)