18-04-2013, 03:26 PM
Process Monitoring and Fault Diagnosis
Process Monitoring.ppt (Size: 593.5 KB / Downloads: 30)
Instructional Objectives
Explain the concept of state estimation with examples
Explain the concept of observability for linear systems with examples
Given the state space model, check observability
Design an observer for state estimation for an LTI System
Why Estimation?
Fault detection and diagnosis involves
Creation of analytical redundancy
Inspection for fault signature on process signals
Estimation of parameters for deviations
The necessary variables may not be measurable directly
State and parameter estimation is often the signal processing block for FDD
Sensor Fault Detection Algorithm
Bank of Estimators used
Estimated states of each observer are cross checked
Normal case
Estimated states from two observer matches
Sensor Fault
Inconsistency found in estimated states from two observer