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The parameter estimation and adaptive excitation control problem is investigated in this paper to tackle the damping parameter uncertain. First, by regarding the high order dynamic terms as disturbance, an uncertain nonlinear power system model is established. Then, during the construction of parameter estimation system, we add a compensation term to design error system independently and adjust the...
With the rapid increase of the new energy power generation and grid-connected and the using of the electric cars, there exist more and more random factors in the power system, which cause great influence on the stability of the power systems. In this paper we analyze the stochastic stability of the power systems under Gauss type of random small excitation. It is shown that the system is mean stability...
The paper addresses the design of anti-windup control for flexible satellite attitude system with actuator saturation. First, a linear observer-based controller is designed to stabilize the satellite attitude system and realizes flexible vibration suppression without considering saturation. According to the difference between the controller output and the saturated actuator output, an anti-windup...
This paper is devoted to the finite-time output synchronization problem for a class of complex delayed dynamical networks with output coupling. The network topology is assumed to be undirected, directed or weighted. By Lyapunov-Krasovskii functional (LKF) method and the Kronecker product technique, some finite-time output synchronization criteria and simple static controllers are obtained. Illustrative...
The cascading failure of complex networks has been given more and more attention recent years. On a network, considering that the initial state and the final state after avalanche could both be seen as dynamic equilibriums, we propose a new cascading model. We investigate the vulnerability of each node on Scale-Free networks and Small-World networks during the process of cascading failures. We find...
In this paper, the chaotic motion of micro-cantilever tip in AFM is considered. A disturbance observer based control approach is proposed. The proposed control approach is composed of state observer, disturbance observer and baseline controller. It is also relatively easy to be realized based on the measurable control input and system output signal. The developed control approach is able to suppress...
This paper focuses on the problem of strictly dissipative control for Markovian jump descriptor systems described by Itô's form. By means of linear matrix inequality, a sufficient condition is derived to make sure that a Markovian jump descriptor system is stochastically admissible and strictly dissipative. Based on the condition, a sufficient condition is also given by designing a partially mode-dependent...
The Internet has caused the skills of world wide-scale collective problem solving, which is known as crowdsourcing that connects the individuals around the world to cooperate and solve the multifarious complex problem. However, due to the openness prominent features of crowdsourcing, it conceives some antisocial behaviors, such as sabotaging, attacking, plagiarizing, and manipulating the solution...
This paper proposed a method of the nonlinear system identification based on time-domain Hammerstein Series model, and use it in the modeling of brushless motors. This method uses the Non-Negative Garrote (NNG) coefficient shrinkage method for dynamical model order determination which is wildly used in statistics community for linear static models. In the first step, an initial high-order nonlinear...
When the measure ship berthing or sailing, it is vulnerable to waves, tidal currents and other complex disturbance. The measurement precision of servo system is related to error and the inertial force caused by measurement ship swing and displacement as well as subgrade. So it is necessary to improve the accuracy of the ship servo system. The active disturbance rejection control (ADRC) algorithm has...
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