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In order to reduce the computational a novel approach is proposed in which the generalized predictive control (GPC) algorithm is improved based on toeplitz matrix in this paper. The control algorithm proposed is simplified by reconstructing the performance index. This approach has good adaptive ability and robustness with low-cost computation. The effectiveness and rapidity of this algorithm is demonstrated...
This paper presents a new image encryption algorithm, in this algorithm, shuffling matrix and diffusing matrix are generated based on Chen's hyper-chaotic system. Firstly, the Chen's hyper-chaotic system is used to shuffle the position of the image pixels, then use Chen's hyper-chaotic system to confuse the relationship between the original image and the cipher image. The experimental results demonstrate...
Based on the Ethernet/IP protocol and communication interfaces with embedded microprocessor platform for analysis, discuss the advantages and disadvantages of the typical variety of hardware platforms and operating systems deeply, propose the most suitable options to realize the EtherNet/IP protocol data communications interface hardware. The experimental tests confirmed the validity of the proposed...
The performance of a Networked Control System is affected by transmission time delays in the communications network. In order to prove effectiveness of NCS algorithm design, experiment must be carried out. Therefore design and implementation of NCS hardware simulation platform is necessary. In this paper, NCS hardware simulation platform connects three computers, first as an object, second as a controller,...
Networked control system (NCS) is a kind of closed loop control systems where the sensors, the controller and the actuators exchange data through network. Because the networks, in which the band width is limited, are introduced in the systems, some new issues appear unavoidably. At present, the research of networked control system becomes a focus area in control engineering. According to the characteristics...
The insertion of the communication network in the networked control systems can induce delay, which may degrade the performance of control systems and even destabilize the system. Firstly, some kinds of NCS random delay are analyzed in this paper. Since the time-delay between controller and actuator is not available, we use grey prediction method to get predictive value. Secondly, a kind of state...
The pseudo random property of chaotic sequences is very useful in the field of information security, based on the idea of orbit hopping, a chaotic image encryption algorithm with a key mixing proportion factor is proposed. In the proposed algorithm the position scrambling matrix and the value scrambling matrix are generated by the improved chaotic logistic sequences. A key mixing proportion factor...
Networked control system has many different characteristics compared with the traditional control system, so it is necessary to do some researches on strategies of networked control systems. In order to research in this area, establishing NCS simulation research platform is extremely important. A design scheme of NCS flexible researching platform is proposed, in which a switch and three computers...
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