The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Automation of polishing process requires control of tool pressure and tool speed. Due to friction between the tool and the part, the tool speed is affected when the tool pressure is changed, and this coupling relationship is nonlinear. In this paper, a linearized model is presented for control of automated polishing process. To do so, first, the contact stress model is introduced based on a Hertzian...
The paper presents the design of a new technique for induction motor control without using speed sensor. Here the discrete time control technique is used to design the controller for induction motor drive. The non-linear model of an induction motor is revisited here and linearized about an operating point to obtain a linear model for the same. A fast output sampling based controller is obtained by...
Anaerobic digestion in bioreactors is an important technology for environmental friendly treatment of organic waste. To optimize and control such processes accurate dynamic models of the process are needed. Unfortunately, modeling of anaerobic digestion often results in high order nonlinear models with many unknown parameters, a fact that complicates controller design. This paper attempts to circumvent...
Power system stabilizers (PSSs) are added to excitation system to enhance the damping of low frequency oscillations. In this paper, the design of PSS for multimachine power system (MMPS) using output feedback sliding mode control is proposed. The nonlinear model of a multimachine power system is linearized at various operating points and the linearized model of the plant is obtained. The multirate...
A method that enhances the performance of a phase locked loop is proposed. The method is based on integrating an adaptive frequency estimator into a standard phase locked loop. This integration significantly improves the performance of the resulting phase locked loop and eliminates some design tradeoffs that are inherent in a standard phase locked loop. The proposed enhanced phase locked loop is analyzed...
Many nonlinear controllers for ball and beam system can achieve in some cases asymptotic stability. Only a few of them apply their nonlinear control theory results in real experiment. On the other hand, many laboratories use PD control for the ball and beam system, but theory analysis is based on a linear approximate model. Little effort has been made to analyze the PD control via the complete nonlinear...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.