Zhaoming Lei

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Real-time production information is important to enterprise for improving management. Therefore, the RFID technology can be used in production to obtain real-time information, which is integrated into the manufacturing execution system, and the decision of management can be real-time transferred to production floor. The production process of textile(More)
In the paper, we discuss the relationship between the membership function of the fuzzy control system and the wavelet basis function. We prove that a wavelet mother function can be described by a membership function of the fuzzy control system and a membership function of the fuzzy control system can also be described by a simple wavelet mother function.(More)
Centroid algorithm, as relatively simple, depends upon the connectivity of WSN and nodes density, in which the error of node orientation is high, the calculation for the minimum error is too lager and the time which it takes too long. In this paper, a new node localization algorithm uses intelligent particle swarm optimization (PSO) to fast convergence(More)
From the supply chain, now RFID technology is gradually applied to the core of manufacturing process. By adopting the RFID technology in workshop layer, the exact real-time information that is obtained from RFID, can be seamlessly integrated into the manufacturing execution system. Therefore it can create additional value, and increase productivity for the(More)
Centroid algorithm, as relatively simple, depends upon the connectivity of WSN and nodes density, in which the error of node orientation is high, the calculation for the minimum error is too large and the time which it takes too long. In this paper, centroid algorithm is improved by weighted vector to enhance precision of node localization, at the same(More)
The paper presents a state predication controller design method to compensate time-delay in discrete networked control systems (NCS). We apply multi-step prediction to current state of the system based on the object prediction model and the measured state values to compensate the stochastic time-delay of NCS. Furthermore, with respect to the case of(More)
Network control system also called NCS is a distributed feedback control system which composed by real-time network. It has the advantages of resource sharing and agility as a low-cost and easy-maintained system. But at the same time, network will also have the problem of time delay which makes difficulties of NCS analysis. The existence of network delay(More)
The paper presents a fuzzy modulator for the PMSM step motion control to modulate the current vector duration to improve the response speed and reduce the torque ripple of the system, on the basis of analyzing the principle of step motion control and introducing the fuzzy logic in. The results of simulation and experiment suggest that the presented approach(More)
A time-stamp based state prediction control approach was presented for compensating time-delay in the networked control system (NCS). Firstly, a time-stamp based algorithm of measuring the time-delay in NCS was studied and the state prediction based time-delay compensation control was implemented to the system. The state prediction control approach to(More)
The paper presents a state prediction controller design method for networked control system (NCS) to compensate time-delay in the control loop based on the time-stamp information carried by the message in control network. At first, we study a time-stamp based algorithm of measuring the time-delay in NCS and apply the state prediction based time-delay(More)