• Diagnosis of an Internal Combustion Engine Cooling System
• Diagnosis of a Secondary Sodium Cooling Loop

Diagnosis of an Internal Combustion Engine Cooling System

Sponsor(s): Hewlett-Packard Laboratories and Agilent Laboratories (Palo Alto, CA) 1998-2000

In this project we built a testbed to evaluate our FDI scheme on a real physical system with integrated data acquisition and processing. We have chosen an automotive internal combustion engine for this purpose. The pictures show the engine, the complete system with instrumentation computer, and a close-up of the sensors.

Engine System Test bed	Data Acquisition	Detail of sensor installation

Diagnosis of a Secondary Sodium Cooling Loop of a fast breeder reactor

Sponsor: PNC (Japan) 1995-1997

In fast breeder reactors, heat from the reactor core is transported to the steam turbine by a primary and secondary liquid sodium cooling loop. Because of the imprecision of liquid sodium flow sensors and their expense, and because the model of the secondary loop is nonlinear and of high order, quantitative diagnosis techniques are hard to apply. Furthermore, since it is critical to quickly respond to failures, steady state methods are not well-suited. We investigate whether a qualitative approach can be applied to quickly detect and isolate faults based on transients in signal behavior using our TRANSCEND system methodology.