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The paper analyzes the influence of the delay on air-to-fuel ratio (A/F) regulation in internal combustion engines. Two feedback controller architectures, an integral controller for the case of a fast A/F sensor and a feedback linearization controller for the case of a slow A/F sensor, are considered. The collocation method is applied to determine the stability and guaranteed rate of convergence regions...
For linear systems with structured uncertainties, the unknown input fault detection observer (UIFDO) provides a robust diagnostic approach by decoupling the fault signals from the unknown input term. However, in real applications, detection performance of the UIFDO degrades seriously as nonlinearities become significant in a wide dynamic operating range. In this paper, a novel UIFDO design and the...
This paper deals with fault detection observer design for linear time-invariant systems with unknown inputs. The design objective is set to minimize a combined performance index Hinfin/H- which means to achieve a good compromise between robustness to the disturbance and sensitivity to the fault. Hence, the fault detection observer is designed to detect the fault of smallest energy possible. In this...
The path following problem for a simplified model of an unhabited aerial vehicle (UAV) in longitudinal motion is investigated using a piecewise-affine (PWA) control law and a Lyapunov based controller design technique. The search for the parameters corresponding to the controller and to a piecewise quadratic Lyapunov function is formulated as an optimization problem subject to linear and bilinear...
This paper deals with robust stability and control of uncertain discrete-time linear systems with Markovian jumping parameters. Systems with polytopic-type parameter uncertainty in either the state-space model matrices, or in the transition probability matrix of the Markov process, are considered. This paper develops new methods of robust stability analysis and robust stabilization in the mean square...
This paper deals with the problem of reliable control for linear systems with uncertainty in all system matrices as well as actuator failures. The goal is to design a constant state feedback controller that provides robust stability and Hinfin, performance for all admissible uncertainties and actuator failures. It is assumed that the parameter uncertainties are norm bounded and the actuator failures...
This paper presents the results of a feasibility study that examined the use of the receding horizon control technique in stabilizing a 6 degree-of-freedom simulation of the Thunder Tiger Raptor 50 V2 remote controlled helicopter. The longitudinal and lateral-directional dynamics of the Raptor 50 helicopter are simulated using a linear parameter varying force model that has been verified against actual...
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