Multiaxis Kinematic Error Compensation Mapping Protocols after Transit
Post-transit multi-axis kinematic re-mapping corrects structural settling and shock displacement to restore five-axis spatial accuracy to sub-ten-micron limits.
Laser Tracker Multilateration
Meaning
High precision metrology technique that determines 3D coordinates by measuring the distance from multiple known locations to a single target. Laser tracker multilateration eliminates the angular uncertainty inherent in single-tracker measurements by relying solely on stable radial distance data. This method provides a major improvement in accuracy for large-scale assembly tasks.
The process involves placing a retroreflector at a point of interest while a tracker captures distance from at least four different setups.
Coordinate Refinement
Mathematical optimization solves for the unknown position by finding the intersection of multiple spheres. In laser tracker multilateration, the redundancy of the data allows for the estimation of the absolute distance offset. This reduces the influence of environmental factors like air temperature and humidity.
Volumetric Uncertainty
Measurement errors are distributed differently than in traditional polar coordinate systems. Because laser tracker multilateration focuses on length rather than angle, the resulting error volume is more uniform and predictable. Aerospace manufacturers utilize this property to verify the alignment of wing jigs and fuselage sections.
Geometric Verification
Final assembly tolerances are checked against a master digital model using these refined points. The results from laser tracker multilateration provide the basis for a formal certification of the tool or part. This high level of confidence is required for components that must interface with robotic drilling or automated fastening systems.