Digital servo implementation: closing loops over VME bus with commercial off-the-shelf processors

Kevin J. Ames

doi:10.1117/12.277208

23 June 1997 Digital servo implementation: closing loops over VME bus with commercial off-the-shelf processors

Kevin J. Ames

Proceedings Volume 3086, Acquisition, Tracking, and Pointing XI; (1997) https://doi.org/10.1117/12.277208
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

Real-time control of gimbaled sensors has been successfully demonstrated using dedicated specialized analog hardware. The reuse of this hardware or its adaptation to new requirements has been limited. To provide more flexibility and allow greater reuse of servo hardware and software, Hughes has developed a commercial off-the-shelf, digitally- based architecture for controlling, measuring and reporting the gimbaled line-of-sight. Applications with multiple servo loops can be performed using real-time hosts and high speed digital signal processors communicating over the VME bus. In this paper we discuss one application of this architecture for a two-axis integrated electro-optical/infrared sensor imbedded in a system with 12 servo loops. The system requirements for gimbal control and line-of-sight reporting required moderately high bandwidth servo loops. Even so, the design incorporated a standard VME bus. Multiple processors with differing interrupt rates were used to control the differing bandwidth servo loops. The requirements, implementation, and performance of this architecture are covered.

Citation Download Citation

Kevin J. Ames "Digital servo implementation: closing loops over VME bus with commercial off-the-shelf processors", Proc. SPIE 3086, Acquisition, Tracking, and Pointing XI, (23 June 1997); https://doi.org/10.1117/12.277208

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