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Adaptive control in the presence of simultaneous sensor bias and actuator failures
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Joshi, Suresh M. |
| Copyright Year | 2012 |
| Description | The problem of simultaneously accommodating unknown sensor biases and unknown actuator failures in uncertain systems is considered in a direct model reference adaptive control (MRAC) setting for state tracking using state feedback. Sensor biases and actuator faults may be present at the outset or may occur at unknown instants of time during operation. A modified MRAC law is proposed, which combines sensor bias estimation with control gain adaptation for accommodation of sensor biases and actuator failures. This control law is shown to provide signal boundedness in the resulting system. For the case when an external asymptotically stable sensor bias estimator is available, an MRAC law is developed to accomplish asymptotic state tracking and signal boundedness. For a special case wherein biases are only present in the rate measurements and bias-free position measurements are available, an MRAC law is developed using a model-independent bias estimator, and is shown to provide asymptotic state tracking with signal boundedness. |
| File Size | 155403 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120002935 |
| Archival Resource Key | ark:/13960/t24b82p77 |
| Language | English |
| Publisher Date | 2012-02-01 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Uncertain Systems Actuators Feedback Model Reference Adaptive Control Bias Control Theory Adaptive Control Failure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
