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.
High-stiffness servo system is easy to cause mechanical resonance in elastic coupling servo system. Although on-line adaptive notch filter is effective in most cases, it will lead to a severer resonance when resonance frequency deviated from the natural torsional frequency. To explain this phenomenon, an improved discrete system model is proposed. This paper quantitatively analyzes the influence of...
The conventional filter method could effectively suppress resonance in servo system without backlash. But when the system contains backlash, the methods may fail. In this paper, a fractional order low-pass filter substitutes the integer order low-pass in a dual-inertia servo system with backlash to solve the problem. Fractional algorithm provides greater flexibility for robust control design, because...
The flexibility of transmission mechanisms in two-mass servo system can lead to its mechanical resonance. If the oscillation amplitude is beyond the shaft tolerance, it will lead to system insecurity problems. In this paper, the model of transmission mechanisms is firstly established, and based on that, four strategies: engineering design, pole placement method, shaft torque state feedback method...
Servo system is greatly influenced by mechanical resonance. The offline suppression of mechanical resonance is determined by the identification of mechanical resonance characteristic. The resonance characteristic can be obtained from the Bode diagram of current closed-loop. This paper discusses two methods of fast acquirement to get resonant characteristic based on pseudo random binary sequence (PRBS)...
Servo driver can greatly reduce the harm of backlash if it owns the function of identifying backlash automatically. Aiming at the problem of backlash identification in servo drive system, the automatic identification schemes on servo driver are reviewed. Based on the dead-zone model of backlash, five different identification methods are summed up. Each implementation process is analyzed specifically,...
Incremental-type encoder is widely used for speed detection in servo system. However, the speed controller of the system usually becomes unstable at low speed range using average speed estimation method. An instantaneous speed estimation scheme for low speed control of permanent magnet synchronous motor is proposed. The speed estimation adopts a full order state observer to calculate feedback speed...
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.