Beyond Best-Fit, Spatial Compensation of Metrology Data

Abstract

Current digital compensation techniques for uncontrolled boundary conditions such as profile at station lines and profile-per-unit-length (PPUL) fall short of accurately characterizing deformed flexible structures. Janicki Industries has developed Spatial Compensation (SC) to overcome these limitations and generate reportable metrology data with realistic force constraints to compensate for these inaccuracies. Technological progress over the last decade has allowed metrology professionals to efficiently collect accurate and comprehensive datasets on large complex structures. However, despite the increased speed and accuracy of the metrology technologies, the stiffness and stability of the structures limit our ability to achieve global tolerances without costly and time-consuming efforts. To achieve the global best-fit tolerance requirements, these structures are typically inspected in either a manually adjusted support condition or on a costly holding fixture.