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.
A Nonlinear Circuit Model (NCM) combined with device/physical parameters was developed by using hyperbolic tangent (tanh) function and applied to GaN high electron mobility transistors (HEMTs). The equations for the NCM were constructed to reproduce the results of a device physical simulation. Model parameters are similar with the parameters used in the device design. The simulated DC and capacitance...
In this paper, an online estimation method of multijoint human arm viscoelasticity for the case of unknown variance is considered. For the unknown variance process of a human multijoint arm, an estimation method of the human multijoint arm viscoelasticity is proposed. The proposed method includes two estimators, the first estimator is to calculate the variance, and the human multijoint arm viscoelasticity...
This paper deals with a design problem of non-minimum phase systems with input constraints and unknown disturbance using the adaptive robust anti-windup generalized predictive control (RAGPC) scheme. In essence non-minimum phase systems are characterized by presence of dead time and invariably has unstable inverse. This effect is not desirable in control processes especially when problems of static...
In this paper, the control of water level process based on robust right coprime factorization approach is proposed. In particular, from the industrial application point of view, the implementation of the designed controller is discussed by using distributed control system (DCS). The experimental result shows the effectiveness of the proposed approach.
In this paper, robust nonlinear control using operator based right coprime factorization for processes with unknown input disturbances is studied. In order to estimate the disturbances, an estimated unit which is described by stable operator is given. Since the disturbances are unknown, a new robust condition using robust right coprime factorization is proposed to the unit. As a result, based on the...
In this paper, model output following control based on command generator tracker is designed and applied to networked aluminum plate thermal process. One of the most important problems on networked system is the time delay problem. An explorative technique is that time delay is approximated as high order rational transfer functions. Therefore, the approximated high order system must be analyzed. Model...
This paper proposes a design scheme of generalized minimum variance control (GMVC) having a new design parameter. The design parameter is introduced by applying coprime factorization approach and Youla-Kucera parameterization of stabilizing compensators to a generalized minimum variance controller. And it is selected by using a genetic algorithm so that the controller is designed to be stable. Therefore...
This paper proposes an extension of self-tuning two degree-of-freedom generalized predictive control based on polynomial approach with computational savings. When the identified plant parameters converge on true values, the proposed method reveals the effect of the integral compensation only if there exists modeling error or disturbance. And a new design parameter is introduced, which is chosen to...
A novel modeling of nonlinear plants with hysteresis is proposed. The hysteresis nonlinearity is described by a modified Prandtl-Ishlinskii hysteresis model which is the weighted superposition of non-symmetric play operator. The proposed hysteresis model also facilitates the utilization of robust right coprime factorization. Simulation result is presented to show the feasibility of the proposed hysteresis...
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.