Production Line Calibration for Sensors on Actively Controlled Bullets

Author:

Erickson Mark1,Costello Mark1

Affiliation:

1. Department of Mechanical Engineering, Oregon State University, Corvallis, OR 97331

Abstract

A simple testing device is presented that simultaneously calibrates all dominant error sources for accelerometers and gyroscopes found in typical microelectromechanical inertial measurement units on smart projectiles, including bias, scale factor, cross axis sensitivity/misalignment, and misposition. The device consists of a table which rotates about a gimbal joint and is supported on the corners by elastic and damping elements. Using dynamic simulation it is shown that motion created by free vibration of the testing platform suitably excites sensors on projectiles so calibration can be performed. Calibration parameters are estimated using an extended Kalman filter. Platform support stiffness and damping characteristics significantly alter the time required to identify calibration parameters by shaping platform motion. A critical level of initial motion of the testing platform is required for adequate prediction of calibration parameters.

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering

Reference12 articles.

1. Tustin, W. , 1987, “How to Calibrate Accelerometer Systems,” Evaluation Engineering, 26, pp. 68–73.

2. McConnell, K. G., and Han, S. B., 1991, “A Theoretical Basis for Cross-Axis Corrections in Tri-Axial Accelerometers,” Proceedings of the International Modal Analysis Conference, Vol. 1, pp. 171–175.

3. Witter, M. C., and Brown, D. L., 1998, “Broadband 6 DOF Accelerometer Calibration Via Impact Excitation,” Proceedings of the16thInternational Modal Analysis Conference, Vol. 2, pp. 907–914.

4. Boutillon, X., and Faure, C., 1998, “The Mean-Projection Method for the Transverse Calibration of Accelerometers,” Acustica United, 84(2), pp. 348–358.

5. Sutton, C. M. , 1990, “Accelerometer Calibration by Dynamic Position Measurement Using Heterodyne Laser Interferometry,” Metrologia, 27, pp. 133–138.

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