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According to the random characteristics of external wind speed, time-varying of the internal unit parameters and nonlinearity of wind turbine system, a pitch angle control strategy based on reinforcement learning algorithm for wind turbine is proposed in this paper. The framework of Actor-Critic is adopted in this algorithm and RBF neural network is used to process continuous input and output space...
In this paper, the design of delay-dependent H∞ controller for a class of singular Lurie systems with state-delay is studied. Delay-dependent sufficient condition is obtained in terms of matrix inequalities to ensure the resultant closed-loop system regularity, free of impulses, global uniform asymptotically stable and a prescribed H∞ performance. Furthermore, an LMI based state feedback H∞ control...
This paper proposes a new approach to reduce the data transmitted in networked control systems (NCSs) via model reduction method. Based on the controllability and observability of the remote controlled plant, the “unimportant” information of system states vector is truncated by balanced truncation method (BTM) before sending to the controller via network. The exponential stability condition of the...
This paper concerns the robust reliable guaranteed-cost H∞ control problem for delta operator switched linear systems with actuator faults. The upper bound of the guaranteed-cost function is determined and the closed-loop system can be guaranteed some H∞ performance by using time and state switching control approaches. Finally, a simulation example is provided to illustrate the proposed methods.
Monitoring system of furnace ash fouling is the foundation of the soot-blowing operation on furnace area. For furnace exit gas temperature (FEGT) is the key parameter in monitoring system, a new CM-LSSVM-PLS method is proposed to predict FEGT. In the process of CM-LSSVM-PLS method, considering the characteristics of operational data, c-means (CM) cluster algorithm is used to partition the training...
Activated sludge wastewater treatment processes are difficult to be controlled because of their complex and nonlinear behaviour. However, the control of the ammonia concentration is very important to achieve the effluent standard. In this paper, the ammonia model is developed which could be used for model predictive control (MPC) of ammonia concentration to a certain value in a wastewater treatment...
Cluster synchronization of delayed neural networks with randomly formed clusters is investigated. In this paper, a distributed approach is proposed to make a delayed neural network achieve cluster synchronization. Furthermore, the coupling strength between nodes adopts locally adaptive strategy, which is only based on its local information. A sufficient condition about the global stability of cluster...
Port competitiveness mainly depends on its profit. Port profit is affected by management measures. How to increase port competitiveness under the premise of the same port soft and hard environment is the main purpose for port managers. In order to meet the requirement, this paper takes three steps to build a benign competition relationship. Firstly, the indictors which influent the port profit are...
This research is focused on developing a practical motion control approach, which can greatly simplify the control-oriented modeling and improve the control performance. For any dynamical system which meets the requirements, all necessary dynamics information is deduced in a general form as two matrices, which skillfully avoids the complicated modeling of multi-rigid-body dynamics. The other information,...
Considering the difficulty of on-line measurement and the large time-lagging in a complex blending process, a hybrid prediction model is proposed to effectively realize the prediction of non-stationary time series parameters with large fluctuation. Firstly, by wavelet decomposing, the original time series is decomposed into different frequency subseries according to scale. Then, according to the characteristics...
The flexible job shop scheduling problem (FJSP) is an extension of the classic job shop scheduling problem (JSP), which breaks through the uniqueness of limit resources, allows a procedure in many machines processing and one machine processing many kinds of different types of procedures. It is more practical and complex than JSP. The computational complexity of FJSP is much higher, which disables...
Different attitude control systems for large-scale morphing flight were developed based on active disturbance rejection control. For the introduced longitudinal parameter-dependent flight dynamics, an attitude control system was developed with a novel control strategy, virtual morphing control surface, put forward. The un-modeled dynamics and aerodynamic error were observed and compensated as a generalized...
Flexibility, parameter uncertainty and joint friction restrict the control performance of flexible joint robots. In this paper, an adaptive backstepping method with friction compensation is presented for the control of flexible joint robots with parameter inaccuracies, in which the joint friction is described by LuGre model and compensated base on a friction observer, and the inaccuracies of robot...
This article for resource-constrained project scheduling problem, first by establishing mathematical model and then using an improved Ant Colony algorithm for optimization, and simulation using MATLAB. Research results show that the improved Ant Colony algorithm for solving resource-constrained project scheduling problem is effective and feasible.
this paper is concerned with Hopf bifurcation behavior and bifurcation control of a new Lorenz-like system. Firstly, Hopf bifurcation type is studied based on the bifurcation stability norm, furthermore bifurcation period and characteristic exponent of system are given. Then the linear controller and the non-linear controller are applied to control the Hopf bifurcation of original system respectively...
The production of semiconductor assembly and testing is wide variety, and the cost of produce time of switch between different products is not the same, which could lead to its utilization is lower, production cycle longer. Thus lot release control plays an important role for improving utilization and shorter production cycle for semiconductor assembly and testing system. In this paper, we modeled...
With the launching activities of spacecrafts, there come the increased demands of autonomous navigation of those medium-high Earth orbital satellites. Now the application of satellite navigation system is mainly on LEO satellite, its application on the medium-high Earth orbital satellites has to be further explored. The navigation of GEO satellites is essentially one kind of parameter estimation and...
Submerged arc furnace is a system with strong coupling, nonlinearity and time-variability. In this paper, a logistic-interpolation-based fuzzy controller for electrode regulation of submerged arc furnace is proposed. The proposed controller is based on fuzzy logic control strategy, and interpolation algorithm is employed to improve the control accuracy without raising complexity of the controller...
Problem of grain supply and demand is an important problem, one of the focuses of China, especially the problem of grain supply and demand for the country's economic development, political stability and social progress are of very important significance. Based on prospect theory this article studies the problem of China's food supply and demand, to build the prediction model of grain supply and demand...
To the problem that current real-time Ethernet POWERLINK cannot implement cross-communication, this paper proposes a scheme to implement cross-communication based on mastering the real-time Ethernet POWERLINK. The cross-communication between any two nodes in the network can be achieved by customizing the protocol stack of the real-time Ethernet POWERLINK and configuring the network parameters. Cross-communication...
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