The present article details a method suitable for fault detection of hydraulic flight control system actuators. A model based method is discussed, which use the linear parameter-varying (LPV) framework, which leads to...
The present article details a method suitable for fault detection of hydraulic flight control system actuators. A model based method is discussed, which use the linear parameter-varying (LPV) framework, which leads to a minimum number of tuning knobs, aiming towards industrial use and certification. The successive steps of the design from deriving mathematical models of the actuator dynamics through filter synthesis, till evaluation of the proposed method on industrial verification campaign are detailed. The proposed framework can be implemented in a flight controlcomputer to detect the rare occurrence of real faults on a hydraulic actuator of an aircraft and isolate them according to the specification.
Quadrotors play a significant role in our lives and are transforming our *** cable-suspended loads is an unavoidable quadrotor application trend and a hot research topic in the control ***,the load swing and unpredict...
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Quadrotors play a significant role in our lives and are transforming our *** cable-suspended loads is an unavoidable quadrotor application trend and a hot research topic in the control ***,the load swing and unpredictability pose significant challenges to the quadrotor's *** this paper,an anti-swing controller with an inner-outer control strategy for the quadrotor-slung load transportation system is *** facilitate the controller design,the outer position dynamics are restructured in the form of ***,a virtual controller is created to force the underactuated states to the dynamic surface to ensure the position subsystem's *** improve robustness,an adaptive law is used to eliminate the effects of uncertain cable ***,a dynamic surface controller for the inner attitude subsystem is presented to drive the actual force to the virtual *** is demonstrated that the control strategy can stabilize the quadrotor despite mass and cable length *** results are provided to demonstrate the efficacy and durability of the proposed method.
Geometric fault detection and isolation filters are known for having excellent fault isolation, fault reconstruction and sensitivity properties under small modeling uncertainty and noise. However they are assumed to b...
Geometric fault detection and isolation filters are known for having excellent fault isolation, fault reconstruction and sensitivity properties under small modeling uncertainty and noise. However they are assumed to be sensitive to model uncertainty and noise. This paper proposes a method to incorporate model uncertainty into the design. First, a geometric filter is designed on the nominal plant. Next a robust model matching problem is solved to design a post-filter that augments the performance of the geometric filter over the set of uncertain plants. The method is compared with the standard H ∞ robust FDI filter design procedure, where the robustness and performance of the residual generation are solved in one step, but disturbance rejection and fault sensitivity are not decoupled from each other. Finally, an aircraft dynamics example is presented to detect and isolate aileron actuator faults to asses the performance of the different filter designs.
Increasing penetration of uncoordinated electric vehicles (EVs) and intermittent renewable energy generation in microgrid systems motivates us to explore an effective strategy for the safe and economic operation of su...
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This paper proposes a hierarchical formation stabilization method for vehicles having nonlinear dynamics. Supposing that the formation control problem is already solved for the case of linear vehicle dynamics, the met...
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This paper proposes a simple robust model predictive algorithm for discrete time linear parameter varying uncertain systems, which depend nonlinearly on their parameters. The method was derived from the robust MPC alg...
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In this paper the idea of input reconstruction by means of system inversion is discussed. In view of the latest results of geometrical system theory the properties of the inverse is characterized. It is shown how the ...
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We present a light field reconstruction algorithm based on splitting-splicing theory increasing number of viewpoints without increasing the number of projectors, which can adjust the distance of two adjacent view imag...
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A method of designing switching controllers for a class of switched systems is presented. It is shown how the design of the switching controller can be broken down into separate design problems for the continuous and ...
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The sensitivity function in a generic two-degree of freedom (TDOF) control system can be decomposed into three major parts: design-, realizability- and modeling-loss. The paper investigates the optimality of the reali...
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ISBN:
(纸本)9780889867468
The sensitivity function in a generic two-degree of freedom (TDOF) control system can be decomposed into three major parts: design-, realizability- and modeling-loss. The paper investigates the optimality of the realizability loss in infinite norm spaces and proposes a new iterative algorithm for the solution.
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