Advanced Materials Research Vols. 945-949

Abstract: This paper is concerned with the dynamic Markov jump filters for discrete-time uncertain system with random delays in the observations. By applying the measurement reorganization approach, the system is further transformed into the delay-free one with Markov jump parameters. Then the estimator is derived by using the regularized least-squares and Markov jump filter theories. At last, a simulation example is given to illustrate the effectiveness of the proposed result.

Abstract: In order to achieve 600 meters radio frequency communication and 2-10 meters serial cable communication between remote controller and parking heater, the paper designed the software of remote controller and vehicle receivers. Using this software process, it can achieve 600 meters wireless radio frequency communication between remoter and receiver, and wired communication 2-10 meters between receiver and ECU, to achieve good control effect.

Abstract: The performance of a controller is usually characterized by several attribute indexes. In this context, this paper applies multi-attribute decision-making techniques to the assessment of control performance, which takes into account both stochastic and deterministic performance indexes. Case studies demonstrate the validity of the proposed method.

Abstract: Free pendulum plate control system controlled by MCU, the system is mainly composed of a swing frame, MCU control module, detection module, motor drive module,display module. Mainly introduces the hardware and software composition of the control system, and the control circuit principle of work, the data acquisition with high accuracy and low range acceleration angle sensor. Free pendulum plate control system using STC12C5A60S2 microcontroller as the main control system, L298N as the motor drive module, STC12C5A60S2 MCU through the L298N drive module drives the PK545-NAC-C29 stepper, making step plate on the machine with the swing and rotation.

Abstract: In recent years, drill string automated processing system on ocean drilling platform has got more and more use in oil drilling platform. It improves the work efficiency and reduces the workers’ labor intensity. In the whole drill automated processing system, lots of large mechanical equipment move in limited space and there exists overlap in the motion trajectory between equipment, which brings hidden danger to safety production. In this article we design an anti-collision prediction system based on perimeter detection and path analysis and it avoids safety accidents that result from the sensors’ failures, occasional researchers or equipment.

Abstract: The adaptive fuzzy logic systems are constructed in this paper by utilizing the data information sampled from the inputs and outputs of unknown functions in the nonlinear systems controlled, and then output stable controller is synthesized for a class of uncertain nonlinear systems based on the universal approximation property of adaptive fuzzy logic systems. Finally, the simulation shows the validity of the method in this paper.

Abstract: The paper analyzed the stability of switched systems with input saturation. First it considered a special case: the switched system with only one subsystem. Using a new method to dispose saturation in the system, the paper gets the sufficient condition of stability of the system. Based on the result, the controller of the system is designed. Then common switched systems were studied. By convex combination method we obtain the sufficient conditon of stability of switched systems and propose a method to estimate the attration domain of the systems.

Abstract: Direct drive volume control (DDVC) electro-hydraulic servo system has many advantages compared to the valve control system. However, its application scopes were restricted by its poor dynamic performance. To study the reason for the low dynamic response, mechanical model of DDVC electro-hydraulic servo system is established. Structure parameters influencing the dynamic performance are analyzed. To optimize the structure parameters, the methodology of orthogonal experiment is presented. The selection of factors and levels of the experiment and the choice of the evaluation index are also revealed. The proposed methodology is carried out by simulation software and an optimal configuration is obtained. The dynamic response of the DDVC system with the optimal parameters is simulated. The results show that the dynamic performances are improved. The cross-over frequencyincreases from 0.0046 rad/s to 0.0442 rad/s, and the rise time T_r decreases from 488.6s to 47.90s.

Abstract: The current card attendance check system in colleges has the problems of low efficiency and accuracy, and severe condition of taking attendance for others. To solve these problems, we have designed attendance check system for college students based on fingerprint identification technology. This system can share information with educational administration system, offering such functions as academic year and semester management, classroom management, lesson management, and schedule management, and attendance check authority management, etc. This system utilizes the characteristics of fingerprints, which carries uniqueness and stability and adopts the increasingly mature fingerprint identification technology. It can improve the quality and efficiency of attendance management for college students, and promote the information construction on campus.

Abstract: RFID (Radio Frequency Identification, RFID) technology is developed in the eighty s of the 20th century a automatic Identification technology. Using radio frequency way between non-contact rf card reader and two-way data transmission, in order to achieve the purpose of target recognition and data exchange. Article from the traditional type of code, compared magnetic card and IC card, rf card has a non-contact, fast reading, no wear, is not affected by the environment, the characteristics of long service life, easy to use and have anti-collision function, can handle multiple CARDS at the same time. Abroad, rfid technology has been widely used in industrial automation, business automation, transportation control management, and many other fields.