Modeling on an Antenna Flexible Characteristics of a Prototype Gimbal with an Antenna and Major Design Factors to determine a System Bandwidth

원형(Prototype) 안테나가 부착된 짐발의 안테나 유연특성 모델링 및 시스템 대역폭 결정 주요설계인자

  • 백주현 (넥스원퓨처(주) 연구개발본부)
  • Published : 2005.05.01


The model of azimuth driving servo system with a flexible antenna in a prototype gimbal has been derived in this work. The validity of the model is verified by comparing the result of the model with that of experiment. It is found that one should consider an antenna as a flexible body in case of modeling the dynamics of the gimbal with an antenna. It is also known that the effect of reducing backlash magnitude for extending the bandwidth in the system with a flexible antenna is smaller than the system with a stiff antenna. It is thought that the model-based design optimization of the gimbal with an antenna will be possible by virtue of the derived model, when a weight reduction and a bandwidth extension are required.




  1. Bigley, W. J., 1993, 'Wideband Base Motion Isolation Control via the State Equalization Technique,' Optical Engineering, Vol. 32, No. 11, pp. 2805-2811
  2. Stockum, L. A. and Carroll, G. R., 1984, 'Precision Stabilized Platforms for Shipboard Electro-Optical Systems,' Proceedings SPIE Acquisition, Tracking, and Pointing, Vol. 493, pp. 414-425
  3. Stockum, L. A. and Burge, J., 1987, 'ElectroMechanical Design for Precision Pointing and Tracking Systems,' Proceedings SPIE Acquisition, Tracking, and Pointing, Vol. 779, pp. 66-74
  4. Iecovich, M., 1990, 'Line of Sight Stabilization Requirements for Target Tracking Systems,' Proceedings SPIE Acquisition, Tracking, and Pointing IV, Vol. 1304, pp. 100-111
  5. Baek, J. H., Kwak, Y. K. and Kim, S. H., 2003, 'On the Frequency Bandwidth Change of a Servo System with a Gear Reducer due to Backlash and Motor Input Voltage,' Archive of Applied Mechanics, 73, pp. 367-376
  6. Baek, J. H., Hong, S. M., Kwak, Y. K. and Kim, S. H., 2002, 'Backlash Estimation of a Seeker Gimbal with Two-Stage Gear Reducers,' Journal of KSME(A), Vol. 26, No. 10, pp. 2130-2141
  7. Chubb, B. A., 1967, Modern Analytical Design of Instrument Servomechanisms, Addison-Wesley Publishing Company, Massachusetts, USA
  8. Clifford, M., 1990, Modern Electronic Motors, Prentice Hall
  9. Nordin, M., Ga1ic, J. and Gutman, P.O., 1997, 'New Models for Backlash and Gear Play,' International Journal of Adaptive Control and Signal Processing, Vol. 11, pp. 49-63<49::AID-ACS394>3.0.CO;2-X
  10. Junkins, J. L. and Kim, Y., 1993, Introduction to Dynamics and Control of Flexible Structures, AIAA Education Series, pp. 139-234