Smart piezo stacks as actuators for precision control of adaptive reflectors

Khanh A. Doung; Ephrahim Garcia; Henry B. Waites

doi:10.1117/12.175206

6 May 1994 Smart piezo stacks as actuators for precision control of adaptive reflectors

Khanh A. Doung, Ephrahim Garcia, Henry B. Waites

Proceedings Volume 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems; (1994) https://doi.org/10.1117/12.175206
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

The use of piezoceramics in micropositioning is increasing tremendously. Deformable and segmented optical reflectors are examples where the micropositioning is critical to system performance. In addition to correcting for mirror flaws and the effects of gravity, the actuators in adaptive segmented reflectors can constantly correct each of the segmented reflector surfaces to compensate for the disturbances in the atmosphere. This task requires the piezoceramic actuator, used to position the mirror, which operates over a large bandwidth with very high resolution. However, the hysteresis associated with piezoceramics hampers its application in optical micropositioning where nanometer resolution and wide bandwidth is required. Clearly, there is a need to compensate for these hysteretic effects to make piezoceramics more suitable for such high resolution applications. This paper presents an investigation of the linear performance of piezoceramic materials. The investigation is made to study the level of precision that can be attained for a broad- band amplification of an open loop micro-positioner. Direct compensation is introduced that can enhance the open loop dynamics of the actuator.

Citation Download Citation

Khanh A. Doung, Ephrahim Garcia, and Henry B. Waites "Smart piezo stacks as actuators for precision control of adaptive reflectors", Proc. SPIE 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems, (6 May 1994); https://doi.org/10.1117/12.175206

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available