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.
In this paper, a motion control IC for linear motor drive X-Y table using FPGA (Field programmable gate array) technology is presented. Firstly, the mathematical model of the X-Y table is defined. Secondly, an adaptive fuzzy controller (AFC) is introduced and adopted in position loop of X-Y table to improve the motion tracking performance under unmodelled uncertainty condition. Thirdly, in implementation,...
According to the operating characteristics of ultrasonic motors (USMs), a new position-velocity feedback control strategy is proposed and implemented in a three-joint robot directly driven by USMs. Robust parameter design has been used to obtain an optimal and robust set of PID controller gains. The index of average position error of joints has been reduced to 87.5%. Results show that, the proposed...
This paper describes our research on a force ripple compensation and closed-loop position control scheme using linear hybrid stepping motors (LHSMs) with significant thrust vibrations. In order to estimate unobservable force ripple components, we propose the Jacobian linearization observer that guarantees the convergence of state estimates into true states. For the precise control of velocity and...
A new type observer for a motion control system is developed and applied to the self-sensing control of an AC-servo motor by estimating the rotor position with the observer. The proposed observer does not need any dividing operation by using the structure similar to the quasi-sliding mode observer and is suitable for DSP applications. Furthermore, since it uses the projection scheme to estimate the...
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.