An active vibration control system using an inertial actuator for suppression of multiple unknown... more An active vibration control system using an inertial actuator for suppression of multiple unknown and/or time-varying vibrations will be presented. The objective is to minimize the residual force by applying an appropriate control effort through the inertial actuator. The system does not use any additional transducer for getting in real time information upon the disturbances. A direct feedback adaptive regulation
In this paper, a fault-tolerant switching control strategy is implemented on a magnetic levitatio... more In this paper, a fault-tolerant switching control strategy is implemented on a magnetic levitation (MAGLEV) system. Two sensors are embedded in the MAGLEV system and their measurements used by two independent estimators. Each sensorsestimator combination, together with a feedback controller can levitate and stabilize a 1-in steel ball at a desired position in the air. The paper focuses on the design and testing of a switching scheme which, at each instant of time, selects the sensors-estimator combination that provides the best closed loop performance based on a chosen criterion. Theoretical results on the system linearization around an operating point ensure local closed-loop stability and good performance under the occurrence of an abrupt fault in one of the plant sensors. Experimental results are provided which confirm the fault-tolerant capabilities of the strategy.
An active vibration control system using an inertial actuator for suppression of multiple unknown... more An active vibration control system using an inertial actuator for suppression of multiple unknown and/or time-varying vibrations will be presented. The objective is to minimize the residual force by applying an appropriate control effort through the inertial actuator. The system does not use any additional transducer for getting in real time information upon the disturbances. A direct feedback adaptive regulation
In this paper, a fault-tolerant switching control strategy is implemented on a magnetic levitatio... more In this paper, a fault-tolerant switching control strategy is implemented on a magnetic levitation (MAGLEV) system. Two sensors are embedded in the MAGLEV system and their measurements used by two independent estimators. Each sensorsestimator combination, together with a feedback controller can levitate and stabilize a 1-in steel ball at a desired position in the air. The paper focuses on the design and testing of a switching scheme which, at each instant of time, selects the sensors-estimator combination that provides the best closed loop performance based on a chosen criterion. Theoretical results on the system linearization around an operating point ensure local closed-loop stability and good performance under the occurrence of an abrupt fault in one of the plant sensors. Experimental results are provided which confirm the fault-tolerant capabilities of the strategy.
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Papers by JOHN MARTINEZ