Technical Papers & Journals

CMSC 2018 Presentation - Development of a hybrid alignment method for a turbine blade using tactile probe and laser scanner

Turbine blade, which is a key component in gas turbine applications, has complicated free-form surfaces and tight geometric tolerances due to increasing efficiency and performance requirements of power systems. Therefore its inspection process is a very...

CMSC 2018 Presentation - Straightening of APS LINAC Accelerating Structures Utilizing a Portable Articulating Arm CMM

William G. Jansma, David J. Bromberek, Jaromir M. Penick

The Advanced Photon Source linear accelerator system utilizes 3-meter long SLAC-type 2856 MHz accelerating structures. Surveys of the APS LINAC indicated distortion in the straightness of the accelerating structures over time, with 7 mm of sag detected in...

CMSC 2018 Presentation - A New Model for Spherical Instrument Measurement Uncertainty

Monte Carlo uncertainty for spherical instruments (e.g. tracking interferometers, theodolites) typically uses a spherical-to-cartesian model whose point clouds change from spheres at the equator to disks as uncertainty point clouds approach zenith and...

CMSC 2018 Presentation - Automated Part Inspection using CNC Machine Probing

The purpose of this technical paper and presentation is to share the steps required to utilize a 5-Axis CNC machine into an automated CMM. There is a limited amount of published information on the subject and both a presentation and a white paper on the...

CMSC 2018 Presentation - Angle-distance constraints based position and orientation estimation method using workshop Measuring and Positioning System

With the development of large-scale manufacturing in aerospace industry, the technologies are also changing, in which digital coordination is dominating. Digital and intelligent manufacturing models have been the key factors to the upgrade of quality and...

CMSC 2018 Presentation - Network Based Measurement Solution for Seam Gap and Mismatch Measurement on the F-35 Joint Strike Fighter

The F-35 is produced in three variants: the Conventional Take-Off and Landing (CTOL) variant, the Short Take-Off and Vertical Landing (STOVL) variant, and the Carrier Variant (CV). In order to ensure the desired performance characteristics on each...

CMSC 2018 Presentation - Application of Simulation Software to Coordinate Measurement Uncertainty Evaluations

Uncertainty evaluations for coordinate measuring machine (CMM) metrology are problematic due to the number, ranges, interactions and generally unknown sensitivity coefficients of the parameters that can influence the measurement result. The situation is...

CMSC 2018 Presentation - Laser/Optical Scanning: Technology Overview from a User’s Perspective

Laser and optical scanning technology has shown great progress over the past decade, and has been used in a variety of applications, such as quality control, reverse engineering, recording historic sites, etc.  We compile the information on...

CMSC 2018 Presentation - Effects of Scan Data Filtering on GD&T Tolerance Evaluation

Scanned point clouds must pass through diverse filters to eliminate the noise arising from environmental and material reflectivity factors. The use of these filters can have significant effects on GD&T (Geometric Dimensioning and Tolerancing) analysis...

Calibration of a Multi-Robot Large Antenna Positioning System for Over-The-Air Testing at the National Institute of Standards and Technology*

In this work, we describe the calibration of two robotic positioners that make up the Large Antenna Positioning System (LAPS) at the National Institute of Standards and Technology (NIST). NIST developed LAPS to support over-the-air (OTA) testing needs for...