Digital Coil Protection System I/O and Data Subsystem for NSTX-U
Authors: Gregory J. Tchilinguirian, Keith G. Erickson and Ronald E. Hatcher
Abstract:
The Digital Coil Protection System (DCPS) for
NSTX-U is a system that evaluates operational parameters in
real time and prevents physical damage to the reactor and its
coils. The system is built upon commercial products: a realtime
Linux operating system and analog and digital I/O
boards. Signals from various digital and analog sources are
captured, conditioned, validated and stored before being
passed to a system of parallel algorithms for processing.
Incremental data must be recorded during processing for postshot
analysis. Additionally, algorithm parameter data must be
stored in a fashion that prevents both inadvertent and
malicious tampering which could result in exposing the
machine to the risk of severe damage.
This paper will discuss the object oriented design and
implementation used to address these challenges. Details of
how real time Linux tools were used to ensure predictable and
stable operation will also be discussed.
__________________________________________________
Submitted to: SOFE 2013 Proeedings (June 0213) 25th Symposium on Fusion Engineering, San Francisco, CA (June 10-14, 2013)
__________________________________________________
Download PPPL-4909 (pdf 659 KB 6 pp)
__________________________________________________