Digital Stabilization System
Keywords:ship, stabilization system, course, Z-transformation, quantizer, extrapolator, controller, correction, discrete transfer function
A model of a discrete system for stabilizing the ship's course has been developed and the results of research on the choice of an optimal digital controller for it are presented. The method of the describing function is used as a research method. In developing a mathematical model of a discrete system, a typical block diagram of a continuous stabilization system was used. The location of the quantizer and extrapolator in it was determined. The latter was selected as a zero-order extrapolator, as the simplest, easily implemented with standard equipment, although the use of a first-order extrapolator can give some advantage in the accuracy of information recovery. Modeling is carried out in state variables and in a classical way based on a discrete transfer function of stabilization system. For the research, the package of visual block simulation modeling of the MatLab matrix system was used. Modeling of the system of stabilization with different types of controllers allowed to carry out their comparative assessment. To improve the properties of the digital proportional integral derivative controller, it is proposed to introduce in it a correction system.
O. K. Ablesimov, E. E. Alexandrov, and I. E. Alexandrova, Automatic control of moving objects and technological processes. Kharkov: NTU “KhPI”, 2008, 443 p. (in Ukrainian).
A. K. Ablesimov and M. A. Pylypenko, “The optimum regulator for the nonlinear stabilization system of the inertial control object,” Electronics and control systems. Kyiv: NAU, no. 1(55), pp. 29–35, 2018. https://doi.org/10.18372/1990-5548.55.12747
Yu. N. Sokolov, Computer analysis and design of control systems, Kharkov: KhAI, 2010, 343 p. (in Ukrainian).
Authors who publish with this journal agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).