Figure Control of Lightweight Optical Structures

By: Nasa, National Aeronautics and Space Adm

The goal of this paper is to demonstrate the use of fuzzy logic controllers in modifying the figure of a piezoceramic bimorph mirror. Non-contact electron actuation technology is used to actively control a bimorph mirror comprised two PZT-5H wafers by varying the electron flux and electron voltages. Due to electron blooming generated by the electron flux, it is difficult to develop an accurate control model for the bimorph mirror through theoretical analysis alone. The non-contact shape control system with electron flux blooming can be approximately described with a heuristic model based on experimental data. Two fuzzy logic feedback controllers are developed to control the shape of the bimorph mirror according to heuristic fuzzy inference rules generated from previous experimental results. Validation of the proposed fuzzy logic controllers is also discussed.Main, John A. and Song, HaipingLangley Research CenterPIEZOELECTRIC CERAMICS; FUZZY SYSTEMS; MATHEMATICAL MODELS; CONTROL SYSTEMS DESIGN; SHAPE CONTROL; MIRRORS; MIMO (CONTROL SYSTEMS); HEURISTIC METHODS; FEEDBACK CONTROL; WAFERS; ELECTRON GUNS; ALGORITHMS; OPTICAL MATERIALS

• Format: Paperback
• Language: English
• ISBN: 1723726230
• ISBN13: 9781723726231
• Release Date: January 1
• Publisher: Independently Published
• Length: 30 Pages
• Weight: 0.21 lbs.
• Dimensions: 0.1" x 8.5" x 11.0"