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Displaying 76 - 100 of 112

An Architecture and Tool for Large-scale System Control with a manufacturing system application

June 1, 2000
Author(s)
Hui-Min Huang, James S. Albus, William P. Shackleford, Harry A. Scott, Thomas R. Kramer, Elena R. Messina, Frederick M. Proctor
This paper describes a reference architecture that is applicable to multiple classes of large-scale, complex real-time control systems. An associated tool, Generic Shell, is also described. Generic Shell employs a set of code templates that facilitate

An Automated Hierarchical Process Planning System

April 28, 2000
Author(s)
Thomas R. Kramer, Hui-Min Huang, Elena R. Messina, Frederick M. Proctor, Harry A. Scott
This paper describes an automated hierarchical process planning system for machining and inspecting discrete parts in an RCS type control system. The system integrates planning with control of a 3-axis machining center and a coordinate measuring machine

Using Shared Memory in Real-Time Linux

January 1, 1999
Author(s)
Frederick M. Proctor
Shared memory can be used in place of first-in-first-out queues (FIFOs) for communication between Linux operating system user processes and real-time Kernel modules. Shared memory has some features (e.g., fast access to large data structures, multiple

A Feature-Based Machining System Using STEP

November 30, 1998
Author(s)
Frederick M. Proctor, Thomas Kramer
Discrete part manufacturing flows from a design phase in which product information is defined to a manufacturing phase in which the processes are planned and executed. Process planning typically culminates with the generation of numerical control (NC)

The NIST DMIS Interpreter: Version 2

October 1, 1998
Author(s)
Thomas Kramer, Frederick M. Proctor, William G. Rippey, Harry A. Scott
The National Institute of Standards and Technology (NIST) DMIS interpreter is a software system that reads control code programs in the DMIS language (described below in Section 1.2), produces calls to a set of canonical commands for coordinate measuring

The NIST DMIS Interpreter: Version 2

October 1, 1998
Author(s)
Thomas R. Kramer, Frederick M. Proctor, William G. Rippey, Harry A. Scott
This report describes an interpreter which reads a file of numerical control code for a coordinate measuring machine (CMM), produces calls to a set of canonical CMM functions, and writes inspection report files. The interpreter is a software system written

JAVA-Based Tools for Development and Diagnosis of Real-Time Control Systems

September 1, 1998
Author(s)
William P. Shackleford, Frederick M. Proctor
The National Institute of Standards and Technology (NIST) has been using the Real-time Control System (RCS) Reference Model Architecture for building control systems based on a hierarchy of cyclically executing control modules. This paper describes the

Validation of Standards Interfaces for Machine Control

May 27, 1996
Author(s)
Frederick M. Proctor, John L. Michaloski, William P. Shackleford, Sandor S. Szabo
Open architecture controllers offer a multitude of benefits to users of machine tools, robots, and coordinate measuring machines, ultimately reducing the life-cycle costs of installing, operating, and maintaining manufacturing equipment. Aside from those

Simulation and Implementation of an Open Architecture Controller

October 1, 1995
Author(s)
Frederick M. Proctor, William P. Shackleford, Charles W. Yang
The National Institute of Standards and Technology (NIST) has developed a modular definition of components for machine control, and a specification to their interfaces, with broad application to robots, machine tools, and coordinate measuring machines

Controls and Sensors for Advanced Manufacturing

January 1, 1994
Author(s)
Frederick M. Proctor
This paper describes research into improving the performance of machine tools and robots. Techniques for improving accuracy, such as thermal compensation, automatic teaching, and force-based surface and edge finishing, are described. These techniques have

Sensor-Based Real-Time Error Compensation

January 1, 1994
Author(s)
Frederick M. Proctor
Machining accuracy can be greatly increased through the use of highresolution position sensors, calibration of machine tool or robot components, and other measures which serve to improve the machine¿s positional response to part programs. Unfortunately