Accession Number : ADA181262

Title :   Automated Assembly Using Feature Localization.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB

Personal Author(s) : Gordon,Steven J.

Report Date : 20 DEC 1986

Pagination or Media Count : 281

Abstract : Automated assembly of mechanical devices is studied by researching methods of operating assembly equipment in a variable manner; that is, systems which may be configured to perform many different assembly operations are studied. The general parts assembly operation involves the removal of alignment errors within some tolerance and without damaging the parts. Two methods for eliminating alignment errors are discussed: a priori suppression and measurement and removal. Both methods are studied with the more novel measurement and removal technique, a fast and accurate six degree-of-freedom position sensor based on a light-stripe vision technique was developed. Specifications for the sensor were derived from an assembly-system error analysis. Studies on extracting accurate information from the sensor by optimally reducing redundant information, filtering quantization noise, and careful calibration procedures were performed. Prototype assembly systems for both error elimination techniques were implemented and used to assemble several products. The assembly system based on the a priori suppression technique uses a number of mechanical assembly tools and software systems which extend the capabilities of industrial robots.

Descriptors :   *ASSEMBLY, *ASSEMBLERS, *INDUSTRIAL ENGINEERING, *SYSTEMS ANALYSIS, ALIGNMENT, ERRORS, AUTOMATION, DEGREES OF FREEDOM, DETECTORS, POSITION(LOCATION), FILTERS, NOISE, QUANTIZATION, MECHANICAL COMPONENTS, TOOLS, CALIBRATION, ELIMINATION, OPERATION, PARTS, PROTOTYPES, REMOVAL, ROBOTS, EXTRACTION, COMPUTER PROGRAMS, SUPPRESSION

Subject Categories : Mfg & Industrial Eng & Control of Product Sys
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE