Combined dual plant modeling and controller design with verification for the nutator system

Yu Cheng Lin, Po Chien Chou, Stone Cheng, Homin Jiang, Ming Tang Chen

Research output: Contribution to conferencePaperpeer-review

Abstract

A nutating subreflector is a convenient method for switching an antenna's beam between its target and background. Technically, the nutating mechanism introduces potential dynamical instability to an antenna structure A typical nutator system can be roughly separated in two major rotating parts, the rocker and the reflector. Both of them equipped with controller, voice coil motor (VCM) and encoders/sensors. We propose combined dual plant modeling to reduce the couple system and combining the rocker and reflector plant in single transfer function form. Besides, we checked the nutator system's stability, controllability and observability. Laser Doppler Vibrometer (LDV) and Dynamic Signal Analyzer (DSA) were used to experiment on the realistic system to build up system dynamic response to verify the mathematical system. PID (Proportional-Integral Derivative) and PDFF(Pseudo-Derivative Feedback with Feed-forward Gain), were designed for it individually. Moreover, adding a white noise block in front of the VCM plant which can simulate the outside disturbance due to wind torque or other environmental impact. Our target was to proposed better effective control loop which inhibited the disturbance effectively. We present a complete analysis of combined dual plant modeling as well as control loop about the nutator system, and verifying the mathematical plant by LDV and DSA.

Original languageEnglish
Pages1433-1443
Number of pages2
DOIs
StatePublished - 16 Aug 2010
Event10th International Conference on Motion and Vibration Control, MOVIC 2010 - Tokyo, Japan
Duration: 17 Aug 201020 Aug 2010

Conference

Conference10th International Conference on Motion and Vibration Control, MOVIC 2010
CountryJapan
CityTokyo
Period17/08/1020/08/10

Keywords

  • Millimeter
  • Nutator system
  • PDFF
  • Telescope
  • Voice coil motor

Fingerprint Dive into the research topics of 'Combined dual plant modeling and controller design with verification for the nutator system'. Together they form a unique fingerprint.

Cite this