Showing papers in "Automation and Instrumentation in 2009"

The bilingual education of

Abstract: Bilingual education in universities and colleges is viewed as an effective and feasible measure to develop talented graduates more competent in the international market.Considering the present situation of bilingual teaching in Modern Control Theory,we pointed out the current problems restricting the teaching method in the four aspects: teaching mode in class,teacher training,teaching materials and English proficiency of students.To improve the efficiency of bilingual teaching in Modern Control Theory,we proposed some constructive and available approaches after we presented and analyzed each of these problems.

Design of Equal Precision Digital Frequency Meter Based on NiosII

Abstract: This paper designed a kind of self-adaptive and high-precision frequency measurement system based on NiosII,and it introduced the basic principles of the equal precision frequency measurement,and the equal precision frequency measurement IP core is also designedThe adaptive algorithm based on the principle of the shortest time for frequency measurement is adopted,for getting the best measure time,and the testing result is also given at end of the articleThe testing result show that the system is of stable and reliable and it’s maximum relative error less than 10-7

Design of Intelligent Street Lights Controller

Abstract: Combined the microcomputer control technology,the sensor and examination technology with the electrical power carrier wave technology,an intelligent street-light controller based on GPRS is successfully developed in this paper.It applies ATMega1280 and PL3105 as the center processors,connecting to GPRS net through SIM card.Illumination,humidity and electrical power parameters can be gathered in real time,as well as processed,stored,displayed and so on.Modular software runs orderly controled by the time dispatcher.The result of system practical operation proves one month can save energy twenty percent.

Electric Locomotive Real-time Monitoring System Based on GPRS

Abstract: This paper presents a design of locomotive real-time monitoring system based on GPRS wireless communi-cation networkThe system structure and the main function of each unit are present and the advantage of GPRS is describedAt last the paper show the way of receiving data on the ground and information analyzing system

Modeling of Biochemical Process Based on Particle Swarm Optimization and Least Squares Support Vector Machine

Abstract: In order to overcome the disadvantage that it’s difficult to get better parameter value in biochemical mod-eling of least squares support vector machine,a method is put forward to finding the better parameter value by parti-cle swarm optimization which has the better search ability.Each particle indicates a group of LSSVM parameters,and the particles will change unceasingly until satisfy the condition.The proposed method is applied to establish a soft-sensor model for Glutanic acid fermentation process.And carries on the forecast using this model.The simulation re-sult indicated that the method can cause the model to obtain the better forecast effect in the glutanic acid fermenta-tion process.

Control of Sensorless BLDCM Based on AT90S8535

Abstract: This paper presents the control principle of sensorless BLDC motor based on the method of back EMFA control system based on AT90S8535 is designed,which is of the function of speed adjusting,and the system control scheme is introduced in detailThe experimental results validates that this design can implement the control effectively with predigesting the hardware design,and it can achieve the effect of digital closed loop control

Design of the Filter with Data Acquisition by Using Audio-card Based on LabVIEW

Abstract: In the environment of LabVIEW development,the data acquisition system and filter design example based on the PC audio card were provided,by using the data acquisition card in computer as the signal recording device,and the A / D converter in audio card to make the A / D process for voice signal without any additional accessories,meanwhile,a variety of filters can be realized on the acquisition of the voice signal filtering treatmentThe result shows easy-to-use,the application shows that the design with low cost and high performance can fully meet the data acquisition and filtering requirements

Design of Motorbicycle Cable’s Efficiency Test Platform Based on LabVIEW

Abstract: This paper mainly introduced the design and hardware component of the Motorcycle cable’s efficiency platform based on Labview,its software construction and test Parameters were introduced tooThis system effectively solved the software and hardware real-time running problem,which could adjust control parameters in real time,and shortend the development period,reduced the costThe test result indicated that this platform can satisfy the Motorcycle cable’s load efficiency test needs and possess a high reliability and good extensibility

Simulation of VAV Air-conditions System Based on Elman Neural Network

Abstract: VAV air-condition systems is of the character of nonlinear and dynamic. Nowadays, the neural network which is used the most extensively is static BP neural network. An Elman neural network, which has a special cor-relation layer is appended to hidden layer of Bp network, can map nonlinear and dynamic behaviors. In the training algorithm of the network, a back-propagation algorithm with adaptive learning speed and momentum gradient failing is used, which can obviously prevent the network to trap in local minimum. The model tested by actual data from VAV air-condition system is established by using both BP network and Elman neural network .By analyzing and comparing, the latter features quick convergence speed and high forecasting precision.

The neurons PID SVC of synchronous generator

Abstract: Let the method of PID with odd nerve cell’s increment mode introduce in the generator’s system of rotate speedThrough uninterrupted learning of nerve cell,the method improved the localization of steady bound affected by linearization with general controller of PIDThe control of PID with odd nerve cell’s increment can effectively realize unification of transient angle stability and stability of generator endThrough numerical emulation of infinite system,the method of timing control has strong robustness,good control character,and be propitious to advance system’s reliability

Analysis and Application of Boiler Drum Water Level Measurement and Control System

Abstract: This paper analyzed various factors which impact drum running.and the importance of drum water level measuring and control is raised,also introduced the application of a variety of instruments and three kinds of control methods in conventional drum water level measuring.and then,we conclude the best measure method and control strategy by comparing all the possibilities.Finally,based on practical application,it proves the superiority of this measure method and control strategy.

Design of the Navigation System for the Inspecting Robot in the Unattended Operation Substation

Abstract: The navigation and positioning system is the key technology for the inspecting robot in the transformer substation to inspect the equipment.Therefore,the author made up the hardware system,which consists of the fiber optic-gyro(FOG)、milemeter、accelerometer、DGPS receiver and the navigation computer.Also,the software of this integrated navigation and orientation system was designed based on the differential GPS(DGPS) and Dead Reckoning(DR) principle,the system adopts the method of the self-north-seeker and switching-integrated navigation.The method is simple and easily feasible,meanwhile,the system has good practicability.The experiment indicates that this system provides to the robot of inspecting the equipment in the transformer substation with continuous,real-time,high accuracy navigation and positioning.

Parameters Selection and Application of Support Vector Machines Based on Quantum Delta Particle Swarm Optimization Algorithm

Abstract: Aiming at the parameters selection of support vector machines(SVM),an improved particle swarm optimiza-tion algorithm(quantum delta particle swarm optimization)was put forward.The algorithm adopted a strategy which op-timized three parameters synchronously.The disadvantage of optimizing for every parameter was avoided.It realized a accurate,stable and rapid optimal parameters selection of SVM.The material step of the method was shown.The simulated experiment proved the effectiveness of the algorithm above.A soft-sensor model of desorption-process about organic solvent recovery was established by applying the selected optimal parameters to modeling of SVM.The simulating result showed that the effectiveness of forecasting is satisfied.

Research and Realization of Reliability Testing System of Pneumatic Cylinder

Abstract: In the most widely used machine of pneumatic applications,the reliability of cylinder is the precondition of the security of the whole system.By the study of the theoretic reliability testing of cylinder,this paper design and implement a reliability testing system of the cylinder based on SMC's CJ2B10-20 cylinder.The uninterrupted experiment for up to one year and the testing data obtained indicate that the reliability testing system of cylinder runs stably,collects,stores and analyzes data easily.This system satisfies the needs of the reliability testing of cylinder.

Infrasound signal collecting system design and implementation

Abstract: For the absence of civilian infrasonic signal collecting system, a system was designed and realized with low cost. The infrasonic signal is collected by professional infrasonic sensor firstly. And then it is processed in turn by conditioning circuits, A/D conversion circuit, serial communication between micro-controller unit and personal computer. Finally, the signal can be displayed on PC. At the same time, the signal can be analyzed with software on PC.

Research and Design of Network Platform Based on WIA-PA

Abstract: This paper introduces the WIA-PA criterion from the wireless industrial networking alliance of china and analyses the energy depleting from hardware design to software design without affecting the performance of the WIAPA networksAt the end of the paper we presented a test about the performance of node hardwareThe results of test show that the method effectively saves the energy of network,and it will be guidance for the design and imple-mentation of WIA-PA network

Application of GPRS in Monitoring System of Distribution Transformer

Abstract: Aiming at data transmission reliability and real-time requirements for distribution transfomer system,a dis- tribution transfomer system based on GPRS (general packet radio service)was raised to realize long-distance monitor- ing of transfomer in the literal sense. The system adopts a 32-bit ARM LPC2210 as the main processor of the mon- itoring terminal and acquires online data by GPRS networt.The security of data transmission is ensured by using the safety algorithm based on CRC. Experimental results show that the system is with real -time,high reliability and quick transmission speed ratio.

Ship relative integrated navigation and positioning based on wireless

Abstract: For the shortcomings existing in the current ship integrated navigation positioning methods of single ship such as depending on GPS overly,bade reliability and fault tolerance,and lacking of the concept of network system,a novel ship relative integrated navigation positioning method based on marine intelligent transport system,which is MITS,is proposed by introducing the wireless network system into ship integrated navigation in this paper.This proposed method doesn’t take the ship in MITS as lone node,so the target ship can use the navigation estimates from other ship nodes in MITS and adopt the optimal distributed weighted fusion in minimizing the trace of estimate error covariance matrix to improve the performance of its integrated navigation positioning estimate.Compared with the integrated navigation algorithm for single ship,the proposed relative navigation method has better navigation accuracy,stability and fault tolerance.

Design of Remote ATE Monitoring Control System Based On GPRS

Abstract: In order to imply the monitoring control ATE system,the control approach of PLC combining with remote computer is utilized.The two established control mode of TD manual control and the computer configuration monitor control switch well without affecting each other.Trough GPRS,the collected data of testing resources state and the system voltage general current and temperature humidity in the system are transmitted to remote control computer for system remote control,the alarm and event storage and print-out.The application result showed that it satisfied the requirement of ATE collectivity integration,raise the using efficiency of the system resources,ensuring the system work safely.

The existing problems and improvement about the small and medium-sized independent photovoltaic system controller

Abstract: In this paper,the major drawbacks of current controller of medium or small sized isolated photovoltaic system is discussed.The two major drawbacks are that the power consumption of the controller itself is too high and that the checking rezult of battery SOC(state of charging) is not accurate enough.Some methods are devoloped to overcome these drawbacks,in which include two original methods:using synchronous rectifier instead of diode of anti-inverse charging;battery SOC checking with setting charging current to 0.

Multi-agent Reinforcement Learning for Collaborative Behavior Optimization Based on Game Theory

Abstract: In order to overcome the problem of convergence in multi-agent system dynamic collaborative behavior op-timization,a novel algorithm named improved Pareto-Q learning based on general-sum game is presented,in which the global goal is the goal of multi-agent learning for local pareto joint behavior,and in which a distribution method for collective payoff based on common acceptability is also presented.The simulation result based on multi-robot be-havior coodindicates this algorithm is feasible and practicable.

Data acquisition station based on GPRS

Abstract: With the development of electronic technique and automation,lot’s of automation instruments have been intelligentized at this time,and their new direction is interconnection.But it’s unique for long distance and separate terminals to transmit using wireless technique.Data acquisition station based on GPRS is just one of the best wireless devices due to its long distance transmission and strong anti-interference ability,so the data acquisition station based on GPRS mentioned in this paper must have a good outlook in the future.

Design and Implementation of Device Interface Driver Based on ARM and WinCE

Abstract: Based on ARM9 and its embedded real time operation system(RTOS)WinCE,this paper presented an em-bedded driver design for device interface,and described the method of SPI stream interface driver design for ARM microprocessor(S3C2410)in detail.The result showed that the driver run well on WinCE,and was suitable to use in embedded end-products.

Design of Virtual DCS System Based on OPC Technology

Abstract: This paper used a kind of way to remote virtual DCS monitor.It followed the OPC standard using the visual basic as development tool and based on existing DCS monitor and control system.The design is connected with the process data and remote client terminal with Winsock.It uses communication technologies complementary methods of Winsock and the OPC server,in addition uses the principle of complementary advantages of POWERBUILDER data management technology,then avoid the harsh requirements of the configuration procedures on the system conditions.It resolves the problem of data management with little cost and realize the remote monitor of process data in field.

DCS control experiment system based on S7-300 PLC and WinCC

Abstract: For the design of the center control system of Hefei High Magnetic Field Laboratory, the DCS control experiment system based on S7-300 PLC and WinCC was researched In this paper, the control strategy was described in detail , and the methods of communication among the management layer, control layer and field layer of this experiment system were introduced with the combination between S7-300 PLC and WinCC Finally, the test results were given

Software project management and risk analysis

Abstract: The effective management of software projects has a key role in the success of project. In this paper, what software project risks are reflected in and how to avoid these risks are discussed. At last, It pointed out that establishing the reasonable management process was very important.

Simulating Study of Performance Objectives for PID Parameters Self-tuning

Abstract: In order to improve the performance and efficiency of PID auto-tuning on the steam control system of boil-ers in power plants,it’s very important to design a optimal performance objective for the advanced optimization.With the system identification model of the power station superheater,this paper makes a research on the optimization of the PID parameters.This research uses the Hooke-Jeeves Algorithm whose performance objectives can be specified as the function of error items.The result of simulating indicates that using the different performance objectives will make diverse influence on the control quality.The constrained quadratic objective function in time domain is the most suitable formula for PID controller parameters optimization on power station superheated steam temperature.Moreover,the tuning method presented in this paper has high ascendance for getting the optimal PID parameters very fast.

The application of temperature forecast in high pressure gas tightness detecting based on BP network

Abstract: The paper introduces the influence of temperature on the measurement precision of air-tightness differential pressure method.Then set up Back-Propagation Network and train it by using experiment data through Forward Modeling.The network is used in the temperature prediction in the container which is needed to be detected,and in the leakage judgment.The research result can greatly improve the accuracy of high-pressure air-tightness.

GA application in computer simulation technology

Abstract: Throughing computer simulation to random questions, the solution of the problem to be solved is arrived. The basic model for computer simulation is proposed based on genetic algorithm. Throughing the calculation of pi, the application process of model is practiced.. It proved that the model had high accuracy during the computer simulation

Industrial Communication Network and System Technology

Abstract: This paper indroduces the concept of industrial communication network,including the feature,application,trend and study hotspot of fieldbus and industrial wireless network.And the key technology of industrial communication network is introduced,including the multibus integration technology of devices system level,EDDL、FDT device description and network safety technology.Also the solution of industrial networked product are discussed.