Dynamics analysis and control of the Malkus-Lorenz waterwheel with parametric errors

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Abstract

This work presents a dynamical analysis for the Malkus-Lorenz waterwheel, a physical system that behaves following the Lorenz equations. With this, two types of controllers were designed to control the system presenting chaotic behavior. The first controller is the time-delay feedback control (TDFC), and the second one is the State-Dependent Riccati Equation control (SDRE). The control strategy for the SDRE control involves the application of two signals: a nonlinear feedforward signal to maintain the controlled system in a periodic orbit, and a feedback signal, to take the system trajectory into the desired periodic orbit. Numerical simulations demonstrated the effectiveness of the control strategy in taking the system presenting chaotic behavior into a desired periodic orbit. In addition, the SDRE control robustness is investigated analyzing parametric errors in control loop.

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Tusset, A. M., Balthazar, J. M., Ribeiro, M. A., Lenz, W. B., Marsola, T. C. L., & Pereira, M. F. V. (2019). Dynamics analysis and control of the Malkus-Lorenz waterwheel with parametric errors. In Springer Proceedings in Physics (Vol. 228, pp. 57–70). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-981-13-9463-8_2

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