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The aim of this paper is to present a method for estimation of parametric faults in closed-loop systems. The key technology applied in this paper is coprime factorization of both the dynamic system as well as the feedback controller. Using the Youla-Jabr-Bongiorno-Kucera (YJBK) parameterization, it is shown that a certain matrix transfer function, the fault signature matrix, is an LFT (linear fractional...
High Frequency (HF) injection sensorless techniques potentially cover an important segment of the sensorless drives market, allowing rotor flux position estimation at low and zero speeds where standard sensorless methods fails. This paper proposes an innovative HF injection-based sensorless technique able to increase the robustness to open-phase faults, simply changing the HF signals processing method...
Fault tolerant control system (FTCS) is to maintain system stability in the presence of fault occurred in the actuators, sensors or other system components. When a fault/failure occurs either in an actuator, sensor or plant, the fault detection and diagnosis (FDD) as the central part of a FTCS will detect and diagnose the source and the magnitude of the fault. The reconfiguration scheme in the FTCS...
Fault tolerance of adjustable speed drives and ride-through capabilities against voltage sags, swells and under voltages have been widely addressed in the past. However, the research activities in these fields have been always focused only on conventional sensored motor drives. In this paper, a detailed analysis regarding the robustness of sensorless controlled electrical drives to inverter faults...
The following topics are dealt with: identification and estimation; manufacturing system; automation; mobile robot; mobile navigation; fire fighting robot; sensor; biorobotics; medical robot; artificial neural network; sensing application; model predictive control; steel-making industry; service robot; field robot; fuzzy system; process control; adaptive control; robust control; power system; assistive...
In this paper, an improved adaptive fault estimation algorithm is proposed for a class of polytopic linear parameter varying (LPV) systems. The conventional adaptive fault estimation design method suffers from low performance of the fault estimation and a strict equation constrain, so a novel fast adaptive fault estimation (FAFE) design method proposed in this paper not only enhances the performance...
The following topics are dealt with: adaptive control; stability and control of time-delay systems; aerospace applications; agent networks; filtering and observer design; stability and control of hybrid and singular systems; networked control systems; tracking; stability of delay systems; UAVs and flight control; agents and autonomous systems; estimation; linear matrix equality methods; control over...
A new fault adaptive control methodology against the actuator failure is proposed. The actuator failure modeling are introduced to denote the actuator healthy coefficients (AHCs) and the unscented Kalman filter (UKF) is employed for on-line estimation of both the flight states and the AHCs parameters of rotorcraft UAV (RUAV). In this paper, The functionality of the approach has been illustrated through...
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