Fault Detection, Isolation, and Recovery

Design algorithms to identify and manage system failures

Enable your safety-critical model to recover from system failures by using redundant logic and explicit transitions for every state. When system faults occur, detect and isolate them by using operating points. Test your model at specific fail times without rerunning the entire simulation.

Topics

Map Fault Conditions to Actions by Using Truth Tables
Use truth tables to map fault conditions to their consequent actions.
Design for Isolation and Recovery in a Chart
Detect system faults and recover from failure modes.
Test Chart with Fault Detection and Redundant Logic
Check the response of an aircraft elevator system to an actuator failure.

Related Information

Scheduling Execution of Simulink Subsystems

Featured Examples

Launch Abort System

Model a launch abort system for an orbiter heading into outer space.

Open Model

Detect Faults in Aircraft Elevator Control System

Design a fault detection, isolation, and recovery (FDIR) application for a pair of aircraft elevators controlled by redundant actuators. This model uses the same fault detection control logic as the Avionics subsystem of the Aerospace Blockset™ example HL-20 Project with Optional FlightGear Interface (Aerospace Blockset).

Open Model

Model a Redundant Sensor Pair by Using Atomic Subcharts

How to model a redundant pair of sensors. By using atomic subcharts, you can compose a large Stateflow® chart from other charts that reside in a library file.

Open Model

Modeling a Fault-Tolerant Fuel Control System

Combine Stateflow® with Simulink® to efficiently model hybrid systems. This type of modeling is particularly useful for systems that have numerous possible operational modes based on discrete events. Traditional signal flow is handled in Simulink while changes in control configuration are implemented in Stateflow. The model described below represents a fuel control system for a gasoline engine. The system is highly robust in that individual sensor failures are detected and the control system is dynamically reconfigured for uninterrupted operation.

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