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.
Electric load simulator (ELS) is a resonant system and has a large coefficient caused by the stiffness of shaft. Its dynamic performance is always limited and stability is hard to be guaranteed. Besides, its external disturbance is the active motion of an actuator, and output is the load torque, which are both different from conventional servo systems. Therefore, the speed controller of ELS needs...
In order to enhance the stability, the control scheme for the wind power generation should have strong robustness. Sliding mode control is powerful to reject disturbance and has good robustness. However, sliding mode control is a fast switching control essentially. While accelerating the speed to reach the sliding surface, it will result in large chattering which can induce high-frequency oscillation...
A novel structure using dual-stator motor is proposed and the corresponding controller is designed. Two stators execute independently based on the method of torque decoupling control, in which one stator is used to simulate the load torque in expectation; the other stator is used to provide inertia moment. In this paper, an adaptive disturbance observer is presented to acquire acceleration information...
Starting from the principle and strategy of changing the diameter of walking wheel, applying ANSYS "C FEMBS "C SIMPACK to construct model of flexible connectors with geometric stiffness. Based on the theory of continuous colLision, we introduce mobile marker to define the nonLinear contact between the wheel's caster and ground. The rigid-flexible simulation analysis was carried out to wheel...
Direct torque control system of permanent magnet synchronous motor based on second order sliding mode speed controller is introduced to solve the problem that flux linkage and rectangular pulse are both too big in the direct torque control of permanent magnet synchronous motor, it is difficult to control at low speed. This method not only makes the state of system converge in limited time, decreases...
Present work shows the merits of space vector modulation direct torque control(SVM-DTC) over the conventional direct torque control(conventional DTC). SVM-DTC technique is helpful in solving the basic issues of torque ripple and variable swithing frequency present in the conventional DTC. In order to get the reference voltage vector which is necessary for the SVM-DTC, this paper describes a method...
A novel CMAC hybrid control strategy with fast convergence and high precision is proposed for the electric loading system of UAVs in order to solve disturbance of the surplus torque. This CMAC control strategy employs a nonuniform memory quantization scheme that defines its computing structure. A weighted Gaussian neighborhood-based activation process is subsequently implemented to facilitate 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.