A multi-class, three-axis rate table for development, large-scale production, in-process testing, calibration, and final inspection of large inertial components and instruments, engineered for ultra-accurate positioning and high-dynamic motion.
Inner roll, middle pitch, and outer yaw axes with continuous angular freedom.
±3 P-P arcsec accuracy, 1.5 arcsec repeatability, and 0.00001° command resolution.
Direct-drive brushless torque motors with up to 6494 N·m maximum torque.
GUI and RS232/RS422 control, with UDP via LAN up to 1 kHz listed as an option.
The FDD-331-ULA is a multi-class, three-axis rate table intended for development, large-scale production, in-process testing, calibration, and final inspection of inertial components and instruments.
The catalog specifically lists large IMUs, IRUs, AHRSs, and INSs belonging to FOG, RLG, and mechanical classes. The product emphasizes user-friendliness and ultra-accurate applications.
The platform provides three degrees of freedom — inner roll, middle pitch, and outer yaw. The middle axis is equipped with a stow lock to facilitate safe loading and unloading of the UUT.
Precision pre-loaded angular-contact ball bearings support loads up to 50 kg. The system includes the necessary interconnecting cables and mating connectors, while wedge levelers allow alignment in two directions.
The architecture combines direct-drive brushless torque motors, absolute optical encoders, precision pre-loaded angular-contact bearings, a precision-machined tabletop, precision-bored bodies, and slip-ring assemblies.
Inner roll, middle pitch, and outer yaw provide three continuous degrees of freedom.
The catalog specifies direct-drive brushless torque motors within a highly reliable servo system.
Absolute optical encoders are mounted directly to the axes for very high precision positioning performance.
Power rings and shielded signal rings provide electrical access to the UUT and enable continuous-rotation simulation.
Axis values below follow the FDD-331-ULA parameter sheet.
80 Hz bandwidth · ±2,500°/s² acceleration · 115 N·m torque
30 Hz bandwidth · ±900°/s² acceleration · 1274 N·m torque
10 Hz bandwidth · ±500°/s² acceleration · 6494 N·m torque
0.0001% over 360° interval · all axes
Position, rate, and acceleration control can be performed manually through the GUI or remotely through RS232/RS422 computer interfaces.
The catalog positions FDD-331-ULA for development, large-scale production, in-process testing, calibration, and final inspection of large inertial components and instruments.
Three-axis development and characterization of large inertial components and instruments.
The datasheet explicitly lists large-scale production among intended uses.
Production-stage verification for large IMUs, IRUs, AHRSs, and INSs.
Ultra-accurate position and rate capability for calibration workflows.
Final inspection of inertial components and instruments across FOG, RLG, and mechanical classes.
The product is explicitly positioned for ultra-accurate applications and high-precision positioning performance.
Values below are transcribed from the Version F · August 2024 parameter sheet.
Open the official two-page ACCUDYNA catalog for the product overview, three-axis ultra-accurate architecture, control system, options, and complete parameter sheet.
The catalog lists communications, slip-ring, and tabletop options for customer-specific integration.
UDP via LAN up to 1 kHz
Special slip ring configurations
Custom-designed tabletops
Wide variety of slip ring capsule designs and wiring schematics
Answers below are limited to catalog-supported information.
Contact ACCUDYNA to discuss application-specific rate, positioning, loading, communications, slip-ring, and tabletop requirements.
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