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For getting larger start thrust, meeting high reliability of high-voltage circuit breaker of breaking capacity and mechanical performance, this paper introduces Particle Swarm Optimization (PSO) algorithm in the optimization design of Cylinder Linear Induction Motor(C-LIM) used in circuit breaker operating mechanism. According to the specific character of the optimization design of the motor, Neighborhood...
Starting performance of refrigeration compressors is very important to compressors. The research on starting performance of rolling piston compressors is the research on starting performance of motors actually. An improved starting sheme was proposed in this paper. Simulation and experiment results indicate that the reliability and stability of the starting performance of compressor are improved.
A new variable step size LMS adaptive filtering algorithm is proposed based on variable region. The step size mu(k) in the algorithm varies with variation of the deviation e(k) region to ensure the optimization of the three performance objectives, which are initial convergent speed, tracking ability of the time-varying system and stable state convergence precision. The convergence of the algorithm...
This paper is concerned with the filtering problem for discrete-time stochastic linear system with bounded multiple packet dropouts. An optimal prior filter is developed in linear unbiased minimum variance sense. Its solution depends on the recursion of a Riccati equation and a Lyapunov equation, which involves the complex computation of multiple sums by some correlated terms. To reduce the computational...
This paper presents a numerical treatment to effectively calculate the static characteristics of the full tilting-pad gas bearings by means of the finite element method. The dimensionless results obtained by analyzing the full three-pad tilting-pad bearings cover the eccentricity ratios from 0.0 to 0.95, the bearing preload coefficient from 0 to 0.4, the bearing number from 0.1 to 4.0 and the bearing...
By following Zhang et al's neural-network design-method, a special kind of neural dynamics is generalized, developed and investigated in this work for online solution of nonlinear equation f(x) = 0. Different from conventional gradient-based dynamics (or termed, gradient-dynamics, GD), the resultant Zhang neural-dynamics (or termed, Zhang dynamics, ZD) is designed based on the elimination of an indefinite...
Aiming at the deficiencies of the mature object-oriented simulation modeling method for Production System, the aspect-oriented extension of UML is completed based on the Senior Properties of UML extension mechanism. As an example of the typical maintenance cross-cutting concerns, the aspect-oriented modeling method of the production line simulation system is studied by using the expansion of UML....
The vibration signal of rotating machine is typical amplitude-modulated signal. In that case, the method of cyclostationary analysis is very effective for extracting and demodulating the modulating signal that usually contains some fault message. However, duo to a good many factors, such as the special construction, the amalgamation of multiple faults and the fluctuation of rotating speed etc., the...
According to the research of the theories, concepts and methodology of Web and DSS, this paper presents a new design method of DSS based on XML technology. The paper describes the developing process of the DSS of logistics distributing center based on XML. The problems have been solved that how data is transferred and exchanged between the DSS of logistics distributing center, logistics ERP and users...
To solve the problem on large storage of images in the synergetic recognition, an improved synergetic recognition method based on manifold learning has been proposed in this paper, in which the advantage and feasibility of combining the two methods has been discussed. The geometrical structure in high dimensions can be well maintained by using manifold learning to reduce dimensions while it is somehow...
In order to get safety and stability braking for a high running vehicle in cornering course, a safety control scheme which combines ABS, AFS and DYC is studied in the paper. The control method is developed based on the vehicle system dynamics and control theories. From the simulation researches based on MATLAB/SIMULINK, the control method developed here can make the vehicle having a good braking stability...
In the context of intelligent transportation, this paper presents a novel online trajectory-generation method for autonomous overtaking capable of handling emergency situations and aborting the manoeuvre, if required, in a smooth and collision free manner. The proposed methodology is guidance based, real-time applicable, and ensures safety and passenger ride comfort. Based on the principles of rendezvous...
The continuous annealing furnace is one of the main equipments in the continuous annealing production line for iron and steel enterprise, and has a direct impact on the quality of cold-rolled strip steel, production and cost. The temperature control of continuous annealing furnace is a complex industrial process which is difficult to control. It is difficult to obtain a good control result by using...
RFID middleware often has to process enormous amounts of data, possibly causing overloading and leading to data errors. Therefore, RFID middleware applications require load-balancing mechanisms. This work proposes a grid-based load-balancing mechanism for RFID middleware applications. The proposed mechanism incorporates functional modules buffer management and load balancing management over a grid...
In this paper, fault detection for networked control system with data packet dropout between sensor and controller is discussed. A fault observer structure is presented, in which the previous system output transmitted successfully is used for feedback of the observer when data packet dropout happens. Suppose continuous data packet dropout is finite, the dynamics of the observer error can be modeled...
The routing technology at the network layer is critical in the architecture of wireless sensor network. As an active branch of routing technology, the cluster based protocols excel on the aspects of network topology management, energy consumption, data aggression, etc. An energy effective routing protocol based on low-energy adaptive clustering hierarchy protocol, which is called CQIR, is proposed...
An automatic constant pressure closed-loop water supply and monitor system of small, secondary pressure waterworks, which composed of Siemens S7-300 PLC, WinCC and ABB frequency converter, is presented. The principle and construction as well as characteristics of the system are introduced also. The function, the stability and the reliability of the water supply system has been improved. The super-harmonic...
Elevators are uncertain and time varying systems. In addition, high performance is required in the next generation elevators, e.g., speed/flight time, accuracy, vibration compensation, human factor(comfort etc.) and robustness. Starting jerks, parameter variation and disturbances cause an uncomfortable run. Considering these problems mentioned above, an adaptive controller is presented in this paper...
Our research aim is to develop techniques for dasiaservice process control and schedulingpsila. In this paper, we introduce a kind of high-level Petri Nets-Colored Petri Nets to service engineering, and present a case study by modeling a well popularly known service system-restaurant service system in the environment of simulation software-CPN Tools.
High-precision operation in gantry systems is required to meet higher demands on synchronization positioning accuracy. In this paper, a synchronous control scheme for gantry moving type milling machining centers using dual linear servomotors is presented. To guarantee the requirement for high accuracy in synchronous tracking, the same position feedback controller is used to single linear motor position...
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