Shuttle Main Engine Model I dent if ication

Implementation of a Model Based Fault Detection and Diagnosis for Actuation Faults of the Space Shuttle Main Engine _=_-

Fault Diagnosis for the Space Shuttle Main Engine

A conceptual design of a model-based fault detection and diagnosis system is developed for the Space Shuttle main engine. The design approach consists of process modeling, residual generation, and fault detection and diagnosis. The engine is modeled using a discrete time, quasilinear state-space representation. Model parameters are determined by identification. Residuals generated from the mode...

Air-Fuel Ratio Control of a Lean Burn SI Engine Using Fuzzy Self Tuning Method

Reducing the exhaust emissions of an spark ignition engine by means of engine modifications requires consideration of the effects of these modifications on the variations of crankshaft torque and the engine roughness respectively. Only if the roughness does not exceed a certain level the vehicle do not begin to surge. This paper presents a method for controlling the air-fuel ratio for a lean bu...

Technical Memorandum 104484 Sensor Failure Detection and Recovery by Neural Networks

This paper describes a new method of sensor failure detection, isolation, and accommodation using a neural network approach. In a propulsion system such as the Space Shuttle Main Engine, the dynamics are usually very complicated and sometimes not well known. However, the number of variables measured is usually much higher than the order of the system. This built-in redundancy of the sensors can...

Graph Grammar Engineering: A Method Used for the Development of an Integrated Programming Support Environment

We introduce a method to specify the functional behaviour of software tools in an incremental and integrated software development environment. This specif ication method is based on graph grammars. I t is an adequate method to specify the behaviour of al l software systems using graphs as internal data structures. We show that a specif ication can be developed systematical ly by which the adapt...