Motion Qualification
Precision motion generation evaluates inertial sensor cross-axis sensitivity and angular rate scale factor accuracy under controlled dynamic conditions. Qualification through multi axis rate table testing subjects complete inertial measurement units to simultaneous rotation about orthogonal axes inside a temperature chamber. Continuous rotation profiles isolate g-sensitive bias shifts from gyroscopic scale factor non-linearities across defined rate ranges.
Motion control systems utilize optical angular encoders to reference table rotation rates against national measurement standards with sub-arcsecond positioning resolution.
Alignment Metrology
Orthogonality errors between physical table axes induce false cross-axis angular acceleration signals during multi-axis rotation sequences. Direct measurement of axis alignment using laser autocollimators establishes geometric correction matrices for multi axis rate table testing datasets. Wobble and axis runout create parasitic rotation vectors that corrupt higher-order scale factor error identifications.
Calibration routines apply geometric correction factors to dynamic sensor measurements to separate table motion artifacts from intrinsic gyro errors.
Thermal Disturbance
Thermal expansion of table structural mounts creates mechanical misalignment between rotation axes during extended temperature sweeps. Bearing friction torque variations introduce low-frequency rate noise during slow rotation profiling.
Verification Boundary
Target rate stability depends upon stable laboratory foundations and precise motor drive current control. Dynamic rate limits remain restricted by maximum slip ring channel bandwidth and total package payload mass. The qualification coverage applies only up to maximum table angular velocity and acceleration boundaries established during table commissioning.
