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.
An adaptive ant colony algorithm is proposed to overcome the premature convergence problem in the conventional ant colony algorithm. The adaptive ant colony is composed of three groups of ants: ordinary ants, abnormal ants and random ants. Each ordinary ant searches the path with the high concentration pheromone at the high probability, each abnormal ant searches the path with the high concentration...
A finite-time adaptive force control scheme is designed for manipulators in the case of that the end-effectors are subjected to rheonomic constraints. There are three advantages of the proposed approach. (1) The finite-time convergence of force tracking error can be ensured. (2) The uncertainty of robotic parameters is solved by an adaptive control scheme. (3) Higher-precision motion tracking performance...
This paper considers optimal control for the firstorder multi-agent systems with leaders. Based on linear quadratic regulator theory, we propose a quadratic cost function which is independent of the interaction graph. For the leader-following consensus problem, the optimal control corresponds to a star topology. For the containment control problem, the optimal control is obtained by solving a series...
In this paper, a novel control method is proposed for single-input single-output second-order nonlinear systems. The proposed controller guarantees the system reach to the sliding mode surface from any initial states and converge to origin along the surface in finite time while solving the problem of singularity. Compared with traditional fast terminal sliding mode (FTSM) controller, the proposed...
This paper compares three sliding mode control laws for nano-positioning systems using piezoelectric actuators (PEAs), where the hysteresis nonlinearity can be viewed as the uncertainties of the system. Compared with the other control laws, sliding mode based controllers (SMC) are proved to be an effective method that specifically appealing to uncertainties and disturbances. To avoid the chattering...
In order to eliminate bad influence caused by parameter uncertainties and external disturbances in spacecraft tracking system, a higher-order sliding mode control strategy is proposed in this paper. Attitude control system is divided into fast loop and slow loop based on singular perturbation. The sign function is replaced by the norm-type switching function for the continuous virtual control in 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.