Software-Implemented Fault Detection for High-Performance Space Applications

We describe and test a software approach to overcoming radiation-induced errors in spaceborne applications running on commercial off-the-shelf components. The approach uses checksum methods to validate results returned by a numerical subroutine operating subject to unpredictable errors in data. We can treat subroutines that return results satisfyinganecessaryconditionhavingalinearform;thechecksum tests compliance with this condition. We discuss the theory and practice of setting numerical tolerances to separate errors caused by a fault from those inherent in finite-precision numerical calculations. We test both the general effectiveness of the linear fault tolerant schemes we propose, and the correct behavior of our parallel implementation of them.

• Type: Conference
• Year: 2000
• Where: DSN
• Authors: Michael J. Turmon, Robert Granat, Daniel S. Katz
• Keywords: Approach Uses Checksum, Computer Networks, DSN 2000, Numerical Subroutine Operating, Overcoming Radiation-induced Errors