Experimental Evaluation of Time-redundant Execution for a Brake-by-wire Application

This paper presents an experimental evaluation of a brake-by-wire application that tolerates transient faults by temporal error masking. A specially designed real-time kernel that masks errors by triple time-redundant execution and voting executes the application on a failstop computer node. The objective is to reduce the number of node failures by masking errors at the computer node level. The real-time kernel always executes the application twice to detect errors, and ensures that a fail-stop failure occurs if there is not enough CPU-time available for a third execution and voting. Fault injection experiments show that temporal error masking reduced the number of fail-stop failures by 42% compared to executing the brake-by-wire task without time redundancy.

• Type: Conference
• Year: 2002
• Where: DSN
• Authors: Joakim Aidemark, Jonny Vinter, Peter Folkesson, Johan Karlsson
• Keywords: Computer Networks, DSN 2002, Real-time Kernel, Temporal Error, Triple Time-redundant Execution