Applied Mechanics and Materials Vols. 130-134

Abstract: Along with the exaltation of people to the electric energy quality requirements, the importance of compensating the reactive power is valued by people. The offset device of various kinds emerges with the tide of time. SVG plays an important part in the reactive compensating by the advantage of its quality. This text described the development, radical principle and control method of SVG and still introduced the limits, advantages and some improvement measures at the same time. Finally carry on analysis to the development tendency and lay foundation for the search of SVG technique.

Abstract: Aimed at the demand of reducing the wiring harness and declining cost in the automobile control system, electrical controlling system of automobile power window is designed with PIC18F258 single chip computer of integrated CAN bus as the core. Hardware structure and flow chart of software are presented. Through the processing of sample current, it can be judged whether the automobile window meets a barrier, thus realizing the anti-pinch function of window. Compared to the point-to-point control, the bus control not only reduces the wiring harness and cost, but also makes the control more flexible and fast. The experiment results show this system can operate normally, the advantage of this system are reliable performance, low cost, low power consumption and easy to maintain.

Abstract: Data mining is a computer analysis technology to birth not long but with rapid development, in these years, data mining theories have matured increasingly, and have shined in practice. This paper introduces briefly the concept of data mining, discusses commonly used data mining technologies, then the applications of data mining are introduced in detail, and expresses good perspective to future of data mining finally.

Abstract: The transportation network dynamic port and the correlation question are in the intelligence transportation system the transportation flow the induction the core theory. This article has first studied the immediate road section transportation time dynamic user most superior assignment characteristic and the road section equation of state, and has established the immediate road section transportation time dynamic user most superior assignment model. In the third part, mainly discussed but should grasp for the time discrimination and the Frank-Wolfe algorithm which the solution immediate dynamic user route selection model; the article finally uses the example through the test, to the model which establishes has carried on the simulation.

Abstract: On the elliptic curve cryptosystem proposed a new multi-proxy signature scheme - (t, k, n) threshold blind proxy signature scheme.In new program blind proxy signature and (t,k,n) threshold secret sharing scheme will be combined, and will not over-concentration of the rights of the blind proxy signer .Computation of the program is small, security is high, the achieve efficiency and the utility is better .can prevent a malicious user's forgery attack and have the security properties of proxy signature.

Abstract: Steering angle features prominently in accident and driver behavior analysis or other applications, but can hardly be recorded in most monitoring devices such as vehicle traveling data recorder. According to vehicle kinematics model, this paper proposes a solution for steering angle determining based on longitudinal velocity and lateral acceleration signals. Simulation and experiments have been conducted to prove the method feasibility and reliability. Furthermore, trajectory reconstruction is demonstrated as one of the many applications of the steering angle estimation.

Abstract: This paper presents a comparative study of two popular Evolutionary Algorithms (EA): GeneticAlgorithms (GA) andParticle Swarm Optimization (PSO) for optimal tuning of Proportional Integral (PI) speed controller in Permanent Magnet Synchronous Motor (PMSM) drives.Comparisons between the results obtained by GA method and those by improved PSO method are made. The experimental results show that the PSO method can locate the optimal or near optimal parameter space and achieve a higher quality solution than the GA method.

Abstract: The application of electric power, which acts as a pillar energy and economic artery in modern society, is one of the most important symbols of the level of development and comprehensive national power of a country. Var is a crucial factor for the design and operation of AC power systems, and is closely bound up with the safety, stabilization, and economical operation of power systems. With the development of electrified railway, the importance of the dynamic var compensation for traction power supply systems of electrified railway becomes more and more distinct. Developing the var compensation strategy vigorously has important senses in theory and practice. In this article, synthetically considering technique and economic leval of power systems in our country, parameters modeling and design and verification and specific engineering application of a var compensation method are presented. This method is a preferable one for resolving undesirable effect on power systems from traction power supply systems of electrified railway, especially having dynamic and real time characteristics of var compensation.

Abstract: Based on tracked vehicle dynamics analysis, a fuzzy control strategy is proposed in this paper for the dual electric tracked vehicle motion control. The inputs of fuzzy system are driver acceleration, braking and steering signals besides vehicle velocity feedback signal, while outputs are dual motors’ torque commands and mechanical braker’s target force. Control strategy contains two fuzzy logics, one is for steering and straight-line running control, the other is for braking control section. Simulation results show that the fuzzy control strategy presented here is correct and effective for electric tracked vehicle motion control.

Abstract: CBR (Case-based reasoning) theory is applied to the automobile quality fault diagnosis field. Case description, case retrieve and case reuse are the main factors of CBR. It is realized by the methods of fault tree construction, discrete cases information entropy weight value calculation, discrete and multi-level semantic matching case retrieval and knowledge difference driving case reuse. The process of solving actual cases verify the validity and efficiency of CBR method in the quality fault diagnosis system.