Design of a measurement system for use in static balancing a two-axis gimbaled antenna

Abstract

The two-axis gimbaled antenna’s performance can be greatly improved if it is statically balanced. This paper intends to present a novel design of a measurement system for use in statically balancing a two-axis gimbaled antenna mounted on an aircraft. The details of the measurement system and its working principle are explained, including the dynamics of the two-degree-of-freedom flexure-hinge leverage and the control configuration of the measurement system. The measurement principle is proposed after the theoretical measurement uncertainties estimated and the key factors that determine the measurement accuracy are found. By controlling the uncertainty induced from the major factors, the measurement accuracy can be finally controlled. The measurement result is proved sufficiently accurate by means of High-speed centrifuge method.

Keywords

Gimbaled antenna unbalance moment measurement system flexure hinge measurement uncertainty

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References

Setiawan

Mukherjee

Maslen

. Synchronous sensor runout and unbalance compensation in active magnetic bearings using bias current excitation. J Dyn Syst Measure Control Trans ASME 2002; 124: 14–24.

Leuschke

Fabien

. Disturbance attenuation using a dc motor for radial force actuation in a rotordynamic system. J Dyn Syst Measure Control Trans ASME 2007; 129: 804–812.

Tang

Chen

. Model development and adaptive imbalance vibration control of magnetic suspended system. Chin J Aeronaut 2007; 20: 434–442.

Kennedy

. Direct versus indirect line of sight (LOS) stabilization. IEEE Trans Control Syst Technol 2003; 11: 3–15.

Lee HP and Yoo IE. Robust control design for a two-axis gimbaled stabilization system. In Proceedings of IEEE conference on aerospace, Big Sky, USA, March, 2008, pp.3265–3271. New York: IEEE.

Lee

. Scan loop design for a spin-stabilized seeker. IEE Proc Control Theor Appl 1998; 145: 119–126.

Kim

Kwak

. Robust control for a two-axis gimbaled sensor system with multivariable feedback systems. IET Proc Control Theor Appl 2010; 4: 539–551.

Kerley MC and Charles W. A model for a two degree of freedom coupled seeker with mass imbalance. In Proceedings of IEEE Southeastcon conference, Tampa, USA, April, 1996, pp.84–87. New York: IEEE.

Laliberté

Gosselin

Jean

. Static balancing of 3-DOF planar parallel mechanisms. IEEE/ASME Trans Mechatron 1999; 4: 363–377.

10.

Zhao

. Measurement method and compensation control for unbalanced moment of inertial platform. J Shanghai JiaoTong Univ (Sci) 2008; 42: 1692–1696.

11.

Zhao

. A new measurement method for unbalanced moments in a two-axis gimbaled seeker. Chin J Aeronaut 2008; 23: 117–122.

12.

Ekstrand

. Equations of motion for a two-axes gimbal system. IEEE Trans Aerospace Electr Syst 2001; 37: 1083–1091.

13.

Zhan

Yan

. Optimal feedback stabilization of a two-axis gimbaled system subject to saturation nonlinearity and multiple disturbances. Proc IMechE, Part G: J Aerospace Engineering. Epub ahead of print 21 December 2012. DOI: 10.1177/0954410012470349.