Applied Mechanics and Materials Vol. 623

Abstract: This paper introduces the tube catching manipulator control system based on DMC, elaborating hardware and software of the whole control system, applying the PID algorithm and closed-loop feedback, putting forward a control system combined increment PID controller and double closed-loop compensation. It makes the manipulator position more accurately and run more stably.

Abstract: This paper begins with analyzing the hazard of system harmonics and proposing the effectiveness of active power filter (APF) in harmonic wave inhibition. Against the background of single-phase parallel type of APF, its working principle is introduced and its mathematical model is built. Next, analyzed in details is the single-phase parallel type of APF double loop control system based on outer voltage loop and inner current loop, with the specific design procedure of PI control parameters of outer voltage loop and inner current loop presented. Finally, through MATLAB simulation, the designed system control parameters undergo verification. The simulation result indicates such single-phase parallel type of APF based on the double loop PI controller with outer voltage loop and inner current loop can ensure stability of the DC bus voltage and make effective compensation for harmonics over the mid-and low-frequency bands.

Abstract: This paper considers the design of switch module. It is a key part of intelligent control emergency power supply. The working reliability of the switch module is an important performance index. Firstly, paper according to the characteristics that watchdog microprocessor software vulnerabilities and a control state to maintain after crash recovery, the design software reset and hardware reset propose two solutions. Next, data acquisition and data communications hardware are using photoelectric isolation technology. To achieve true electrical isolation, the system uses three power supply witch are electrically independent. And then, module data communication protocol used MODBUS_RTU, and design force control configuration software debugging interface. Finally, Experimental verification of the software programs and hardware circuit correctness and reliability. Module design reflects the improved anti-jamming capability, while more suitable for general purpose, industrialization and production.

Abstract: The Fault detection and diagnosis for sensors are important for the performance of the complex control system seriously. The kernel principal component analysis (KPCA) effectively captures the nonlinear relationship of the process variables, which computes principal component in high-dimensional feature space by means of integral operators and nonlinear kernel functions. The KPCA method is used in diagnosing for four common sensor faults. At first its fault is detected by Q statistic; secondly its fault is identified by T2 contribution percent change. The simulation and the practical result show the KPCA method has good performance on complex control system in sensor fault detection and diagnosis.

Abstract: Many medical treatments need to confront problem of upper limbs’ rehabilitation. Major function of exoskeletal robot system for upper limbs rehabilitation is to assist patient to carry out upper limbs’ rehabilitation training. Main technology of exoskeletal robot system for upper limbs rehabilitation includes design of mechanical structure of exoskeletal robot, design of control system of exoskeletal robot and implemention of data and information transmission between exoskeletal robot and upper limbs of human body. Currently implemention of data and information transmission rely mainly on methods of acquiring sEMG signal and force feedback. Reviewing and analyzing the specific technical examples will be important way in improving and upgrading the technology in future. Current development trend of main technology is to advance degree of comfort, accuracy and effect in rehabilitation training. Further development trend of main technology henceforth is people-oriented, strengthening effect, improving efficiency, optimizing structure and reducing energy consumption that follow claims of medical treatment.

Abstract: Major function of exoskeletal robot system for upper limbs rehabilitation is to assist patient to carry out upper limbs’ rehabilitation training. Main technology of exoskeletal robot system for upper limbs rehabilitation includes design of mechanical structure of exoskeletal robot, design of control system of exoskeletal robot and implemention of data and information transmission between exoskeletal robot and upper limbs of human body. Reviewing and analyzing the specific technical development and deficiency in field of exoskeletal robot system for upper limbs rehabilitation will be important way in improving and upgrading the technology in future. Current development trend of main technology is to advance degree of comfort, accuracy and effect in rehabilitation training. Further development trend of main technology henceforth is people-oriented, strengthening effect, improving efficiency, optimizing structure and reducing energy consumption that follow science-technology ethical claims.

Abstract: In this thesis, in order to solve the student arrearage problems in colleges and universities, risk weight factor is introduced to improve ID3 algorithm through the research on data mining technology and the combination with financial management system of colleges and universities so that ID3 decision-making tree algorithm can classify based on the risk weights of all the factors of the financial data; the early warning system scheme on the student arrearage problems in colleges and universities is designed so as to predict the high-risk defaulting students dynamically and accurately and lay scientific foundations for avoiding financial risk in colleges and universities.

Abstract: A basic problem in the design of monitoring system is how to improve the usability, this paper describes a methods based on the User-Centered Design and analyses user from task domains and cognitive psychology aspects. After deciding the interaction system’s task requirement and usability requirement, we develop the Fiber Bragg Grating Monitoring System in JAVA platform with JAXB and JDBC technology.

Abstract: There is a clear lack of respect about traditional network adaptive learning system teaching on individualized assessment knowledge and building tacit knowledge, and this paper presents a knowledge model that supports personalized knowledge assessment, knowledge stored in the cloud computing environment, and construct tacit knowledge for learning body, to provide a personalized learning services for learners to achieve user to adapt the system to adapt to the user's system and two-way adaptation, this paper has guiding significance for further studies of adaptive learning systems.

Abstract: Nowadays, lots of college campus portal systems have many problems, such as teachers and students do not want to use the systems. This paper, which analyzes the advantages and disadvantages of two kinds of portal systems, and it also insight the demands of teachers and students, is in order to construct a portal system which applies to the private colleges with combining the Portal system and the CCS system. Hoping the portal system’s construction plan can have a certain reference value for the other universities and colleges who are going to construct campus portal system.