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Control of a Ball and Beam System under Intermittent Feedback |
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Sang-Young Oh(Dong-A University, Korea), Kyung-Tae Lee(Master's Space, Korea), Ho-Lim Choi(Dong-A University, Korea) |
| The control of a ball and beam system has been a well-known research subject and there have been a large number of related research results by far. To our best knowledge, however, all those existing results have basically assumed that their proposed controllers work under `good' or `normal' feedback conditions, which specifically means in this case that there is not any time period during which feedback is disrupted. We suggest a new switching control method which can keep the states of a ball and beam system within certain bounds when there occurs a nontrivial feedback disruption. |
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Robust dynamic output-feedback control of singular Markovian jump systems |
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Chan-eun Park, In Seok Park, Nam Kyu Kwon, PooGyeon Park(Pohang University of Science and Technology, Korea) |
| This paper designs dynamic output-feedback control for singular Markovian jump systems with model uncertainty and input saturation. By representing the closed-loop system between SMJS and dynamic output-feedback control as quasi-linear parameter varying systems, we obtain the stochastic admissibility criterion of the closed-loop system in terms of matrix inequalities. To reformulate it into strict linear matrix inequalities (LMIs), we design a specially designed block matrices and apply congruence transformation to the stochastic admissibility criterion. |
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Uncertainty and Disturbance Estimator Based Robust Pitch Autopilot |
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Rakshith Vishwanatha, Sharath Rao, Abhishek Basrithaya, Chandar TS(PES University, India) |
| A control technique called Uncertainty and Disturbance Estimator (UDE) has been applied on a missile pitch autopilot. To control the nonlinear nominal missile model, an Input Output Linearization (IOL) controller has been designed. IOL has been augmented with UDE to robustify the system against pitch plane uncertainties. A Luenberger-like UDE observer has also been designed and stability analysis has been performed on the IOL augmented UDE based Controller-Observer. Simulations in various operating conditions and comparative study with other prominent nonlinear robust control laws is included. |
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Design of a Robust Two-Degree-of-Freedom Controller for Two-Axis Gimbaled System |
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Nguyen Vinh Hao, Nguyen Dinh Huan(HoChiMinh City University of Technology, Viet Nam) |
| This paper presents a two-degree-of-freedom robust controller for stabilization loop of a two-axis gimbaled sensor system. This control structure is shown to guarantee disturbance rejection and reference tracking simultaneously. Additionally, numerical and experimental results show that full-order robust H∞ controller designed with LMI method has better performance compared to PI controller based on fixed-order H∞ optimization method |
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