Parametric model identification of high-speed craft dynamics |
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| Authors: | Rocío Muñoz-Mansilla Joaquín Aranda José Manuel Díaz J de la Cruz |
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| Institution: | 1. Computer and Automatic Control Department, UNED, Madrid, Spain;2. Computer Architecture and Automatic Control Department, UCM, Madrid, Spain |
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| Abstract: | Parametric models of heave, pitch and roll dynamics of a high-speed craft have been estimated for different wave incidence angles in the frequency domain. Several issues that make the identification problem interesting are the following: type of parameterization, starting values, non-quadratic functions, excitation signals and short data record. The method employed guarantees a fine linear approximation of the nonlinear dynamics of a fast ship for the ultimate goal of stabilization control to reduce motion sickness associated with heave, pitch and roll accelerations. In addition, the approach achieves high-quality starting values and avoids non-quadratic terms in the cost function, which results in less computational load and significantly more accurate models when compared with a previous method employed for the same problem. |
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