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.
This paper presents the solution to the tracking control problem for an underactuated scaled autonomous helicopter using variable structure control via output measurements. First, it is designed a state-feedback second order sliding mode controller to stabilize height and rotation positions. Controller is designed from a reduced model of the helicopter and the resulting control law is tested in its...
The demands on bearingless drive configurations concerning performance as well as costs are high. The proposed bearingless brushless DC motor consists of five concentrated coils in a symmetrical arrangement, which generate radial forces and motor torque simultaneously in interaction with a permanent-magnet-excited disk-shaped rotor. Additionally, tilting deflection and the axial position of the rotor...
In this paper we present an application of a recently developed strategy for robust distributed controller design for formations and show a way of including performance requirements in the design. The proposed synthesis method guarantees stability for all possible formations and arbitrary fast changes in the communication topology. The number of agents in the formation can also be chosen arbitrarily...
In this paper a new method to inspect the speed and position of linear motor is presented. We find the mathematical model of PMLSM in the rotationary dq coordinate contains the nonlinear term and it satisfies Lipschitz conditions. So we introduce an observer design method for Lipschitz nonlinear systems in the presence of bounded disturbances and give the stability condition of the observer with the...
This paper presents a helicopter dynamic model controlled by a nonlinear output feedback controller. Particular emphasis is placed on the mathematical modeling of the main rotor dynamics, i.e., modeling the individual dynamics of the blades and the dynamics of the main rotor stabilizing bar. Since the derived model is highly nonlinear, an output feedback controller that uses a nonlinear observer is...
We present the current results of our ongoing research in achieving efficient control of a flying robot for a wide variety of possible applications. A lightweight small indoor helicopter has been equipped with an embedded system and relatively simple sensors to achieve autonomous stable flight. The controllers have been tuned using genetic algorithms to further enhance flight stability. A number of...
In this paper an optimal nonlinear multiple-input multiple-output (MIMO) predictive control approach is applied to control the flux and the rotor position of a three-phase induction machine. For this, a nonlinear induction machine model is elaborated in the synchronous d-q frame rotating with electromagnetic field. Then, the outputs are predicted over a predefined prediction horizon. The design of...
The demands on bearingless drive configurations concerning performance as well as costs are high. The proposed bearingless brushless DC motor consists of five concentrated coils in a symmetrical arrangement, which generate radial forces and motor torque simultaneously in interaction with a permanent magnet excited disc shaped rotor. Additionally, tilting deflection and the axial position of the rotor...
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.