Advanced Materials Research Vols. 490-495

Abstract: According to actual request for vehicle supervise, the map control system that using MAPINFO module is presented. Moreover, diagram layer operation and track control are described detailedly.

Abstract: Delay-dependent robust strictly dissipative analysis for a class of singular linear parameter-varying (LPV) systems with delays is investigated in this paper. By constructing a proper Lyapunov functional and using matrix inequality techniques, a delay-dependent robust strictly dissipativity criterion for a class of singular LPV systems with delays is derived. A numerical example is presented to demonstrate the effectiveness of the proposed method.

Abstract: The rear multi-stage cylinder direct-acting hydraulic body hoist mechanism is widely used in mining dump truck. The working principle of the body hoist mechanism is introduced. The dumping process is simplified through the introduction of “dumping line” and the variation of ore mass and hoist torque are analyzed. The optimization design of the position of body hoist mechanism is done using Maple software on the basis of direct search method aimed at minimizing the initial hoist force and the stroke of cylinder and maximizing the hoist force arm when the second stage cylinder starts to stretch out.

Abstract: Technology of digital modulation plays an important role in digital communication system, the combination of digital communication technology and FPGA is a certain trend. This paper designs and realizes a new π／4-DQPSK modulator based on FPGA. The simulation result provides the correction of the design. With simple solution, high integration and high reliability, this π／4-DQPSK modulator can be widely used in digital communication field.

Abstract: Considering the complex nonlinearities of valve-controlled asymmetrical cylinder, a more accurate nonlinear state-space model is established. Then, states feedback linearization technique is introduced to linearize the model exactly and the stability of inner subsystem is analysised by zero dynamics method with the specific system parameters. Based on the linearized model, optimal control theory is applied to design a nonlinear optimal tracking controller and confirmatory simulation experiments are carried out. The results reveal that, the controller is reasonable and effective, and shows splendid performance in tracking various inputs with a high level of robustness and strong abilities to keep undisturbed by load varying.

Abstract: In the application of intuitionistic fuzzy sets(IFSs), distances and similarity measures play very important roles. In this paper, firstly, the modified definition of normalized distance and degree of similarity between IFSs are introduced, which are proved to be more reasonable than some existing definitions. Then, the relations between normalized distance and degree of similarity are analyzed. New distances and similarity measures between IFSs are proposed and corresponding proofs are given. Finally, a comparison of application to pattern recognitions is made to show the proposed distances and similarity measures are more reasonable than some existing methods.

Abstract: It is important to accurately previse the circumstances of the tunnel face in advance to realize a safe construction, because of the polytrope and indefinability to mountain ridge tunnel surrounding rock. However, it is also painful evaluating the detecting zone precisely because of the influence of complex geological conditions and uncertain interpreting outcome. With the study and application on long distance lead forecast in Sheng Ren Moutain tunnel of Mei Zhou-Da Pu highway using TSP48, this paper introduces the principle of parameters electing in data managing and detecting to achieve precisely explaining about the detecting zone. The interpretation is not only more close to practice, but also can provide a piece of reliable data to the construction, which can effectively promote the construction safe.

Abstract: Monitoring measurement is of vital importance in mastering surrounding rocks dynamic, adjusting support parameters and determining reasonable supporting time in road tunnel construction using new Austrian method. The grey system theory can predict the development of surrounding rocks and the time required for the steady state by analysis and processing with a few original data. In this paper, the grey system theory was applied in the prediction of the crown settlement of Jiulianshan Mountain Tunnel and compared with the traditional regression analysis method. The results show that the grey system theory has great advantages in the prediction of the tunnel crown settlement

Abstract: Now，it is a waste of large capacity cell in series and will cause fatal damage to the whole battery if one cell occurs failure. In this paper, a scheme of Parallel lithium/polymer battery Charge-Discharge intelligent management system with MCU(Micro-Computer Unit) and switch power supply technology is introduced. Under DC-DC transform of switch power, it can boost voltage of battery from 4.2V to voltage needed, but also reduce power waste of battery charge system and requirement of cell in coherence.

Abstract: In this study, an electromechanical integrated electromagnetism worm drive is proposed and its operating principle is introduced. The equations of electromechanical coupled force and the systematic output torque for the drive are given by means of electromagnetism harmonic drive and permanent magnet worm drive transmission principle . By using an example to analysis the system output moment distribution. This paper lays the theoretic foundation for deeper theoretic analysis on drive and manufacture technologies study.