Abstract: In this study, a dynamic model of proportional pressure control valve using the bond graph and a predictive controller are presented in the form of dynamic matrix control which is concerned with a design method of digital controller for the electro hydraulic servo system. The bond graph can be utilized for all types of systems which involve power and energy, and it is applied to a propotional pressure control valve in this study. Recently, many researchers suggested that better control performance could be obtained by means of the predictive controls with future reference input, future control output and future control error. The Predictive controller is very practical because the controller can be easily applicable to a personal computer or a microprocessor. This study investigates through numerical simulations that hydraulic system with the predictive controller shows very good control performances.

Abstract: Based on the analysis limitation of GM(1,1) gray model, genetic algorithm is introduced into the model of GM(1,1), a new gray forecasting method is proposed to forecast the mid-long term load of power systems. Simulated calculation results demonstrate that it is an accurate and efficient method.

Abstract: This paper reviews the development of predintive control algorithm in retrospect, and introducesthe combination of predictive control and other control modes. It analyses the characteristics of thermalprocessing and problems of traditional PID control. It summarizes the research results that predictive controlapplied to thermal processing control in recent years. Both simulation research and practical application havepowerfully proved that predictive control can be applied to thermal processing .control and get better controlquality. Particularly with application of DCS, predictive control will play a more important role.

Abstract: The chemical reaction process of corrosion from flue gas of Municipal Solid Waste (MSW) incineration to metal heating surface in MSW incinerator is analyzed. The impacts of high temperature corrosion rate from chloride to immersed tube, superheater are discussed. The reason of metal tube corrosion in MSW incinerator is related with flue gas composition, flue gas temperature, metal tube temperature and anti-corrosion properties of metal tube.

Abstract: The principle of the FDM(fused deposition modeling) process is based on the layer by layer manufacturing technology, like other RP(rapid prototyping) process. In the FDM process, each layer may have different shape. Therefore, the built model may have stairs shape on its surface. This stairs shape is one of the serious problems in the FDM process. Thus in this study, cube models and spherical models were fabricated by FDM process to investigate the influence of injection amount on surface roughness. Models with various road width were also built to investigate the influence of road width on surface roughness. Surface roughness of the models was measured and analyzed. The result obtained in this study are expected to help selecting the part build orientation for optimum surface roughness.

Abstract: Commercial vehicles are mostly subjected to relatively rougher ground environment than passenger vehicles. Many driver's seats of commercial vehicles have suspension system with spring and dampers. Then, impact or vibrative forces transmitted from the vehicle to the driver can be attenuated. This study deals with a ride evaluation method using sky-hook control algorithm for the suspension dampers. Vibration amplitude transmissibilities were compared between passive dampers and semi-active dampers with sky-hook control method.

Abstract: Design of experiment was applied to analyze the shrinkage characteristics of the bobbin molded by injection molding. Among lots of design and processing conditions, the thickness of a bobbin and cooling conditions of a mold were considered. The temperature difference between top and bottom parts of the bobbin was considered as the objective to minimize the shrinkage of a bobbin. Optimal thickness of a bobbin was 2.0mm at the part of body and 1.5mm at the part of wing, respectively. Optimal cooling conditions such as cooling time and coolant inlet temperature were 12 second and , respectively.

Abstract: The advantages and disadvantages between two ways of switching-in network about chp Plant of Yizheng Chemical Fibre Co.,Ltd are described.It indicates a concrete measure on avoiding penetration power drift.Meanwhile it expounds the features on safety in production about captive power plant.

Abstract: The application value and realization of Cache and the process of data exchange are introduced.

Abstract: The ordinary faults phenomenon, analysis of the cause, countermeasures and preventive measures are stated. It is introduced that the new rotating throat components for medium speed coal pulverizer can optimize coal preparation and obtain better combustion.

Abstract: There has been no report on the life prediction for gas turbine materials at high temperatures based on the creep properties and their relationship with the AE(acoustic emission) properties as a means of real-time non-destructive testing. One of the important issues is thus to develop a reliable method of evaluating creep properties by the AE technique. In this paper, the real-time evaluation of high temperature creep time and AE cumulative counts for nickel-based superalloy Udimet 720 was performed on round-bar type specimens under pure load at the temperatures of 811, 922 and 977K. The total AE cumulative counts until the starting point of secondary creep() and that of tertiary creep() have quantitative relationship with the tertiary creep time and the rupture time. It is thus possible to construct the life prediction system based on creep and the prevention system of tertiary creep by using AE technique.

Abstract: The change of pressure in condenser will cause the change of micro-power in turbine unit. However, the velocity of cooling water in condensers can cause the change of pressure by affecting the heat transfer coefficient and the fouling resistance in cooling water side. Taking into account the fouling resistance in cooling waterside changes as cooling water velocity changes, a mathematical model is proposed on the base of the stimulant experiment to the fouling of condenser. An optimal velocity of cooling water and an optimal tube diameter in cooling water side are obtained under the objective function of maximum economic benefit. The factors to the optimal velocity and the optimal diameter are also analyzed.

Abstract: The situation and newest accomplishments in gas/solid two-phase flow studies are introduced.

Abstract: A method of diagnosis based on the neural-net for the faulty high pressure heaters is put forward. This method possesses a stronger pattern-recognition function for the failure modes thus provides an effective measure of accuracy, automation and scientification for the fault diagnosis of high pressure heaters.

Abstract: Not only ferrous but also non-ferrous materials such as aluminum, brass, plastic and woods need cutting operation in recent manufacturing industry. Over the past few years a considerable number of studies have been made on non-ferrous metal cutting. But more study is required to meet various engineering needs. The purpose of this paper is to preform an experiment on the influence of feed-rate adjustment and side rake angle in turning operations from non-ferrous metals. As a result, the surface roughness was reduced when a side-rake angle increases and feed-rate decreases in the case of the plastic, brass, aluminum, and paulownia. Therefore, this papers develop a new type bite that be used to adjust side-rake angle.

Abstract: The software scheme of LN2000 system is introduced. In the processing of design for modules of system, modern control algorithm modules are designed and developed, making use of application results of modern control strategy in thermal processing control sufficiently. For neural networks control especially, the module with adaptive control based on a neuron is developed successfully. Input variables, output variables and parameters of the module is introduced particularly, and the method of non-turbulent switch from manual control to automatic control is discussed. According to main steam temperature object in the thermal power plant, a cascade control system is established with the adaptive controller based on a neuron, and real time simulation is carried out with LN2000 DCS platform. Tracking performance and strong robust of the system are proved by real time simulation results.

Abstract: 【The purpose of this study is preventing the stick, scuffing, scratch between piston and cylinder in advance, and obtaining data for duration test in actual engine operation. The temperature gradient in cylinder bore according to coolant temperature were measured using $1.5{\ell}$ class diesel engine. 20 thermocouples were installed 2mm deep inside from cylinder wall near top ring of piston in cylinder block, at which points major thermal loads exist. It is suggested as proper measurement points for engine design by industrial engineers. Under full load and $70^{\circ}$ , $80^{\circ}C$ and $90^{\circ}C$ coolant temperature conditions, the temperature in cylinder block and engine oil increased gradually according to the increase of coolant temperature, the siamese side temperature of top dead center is $142^{\circ}C$ in peripheral distribution, that is about $20^{\circ}C$ higher than that at thrust, anti-thrust, and rear side temperature, respectively. The maximum pressure of combustion gas in $70^{\circ}C$ coolant temperature is about 2 bar lower than those of $80^{\circ}C$ and $90^{\circ}C$ coolant temperature. The engine torque in $80^{\circ}C$ , $90^{\circ}C$ coolant temperature condition is about 4.9Nm higher than that of $70^{\circ}C$ coolant temperature.】

Abstract: The characteristics of corrosion resistance for the surface of ductile cast iron(GCD40) by plasma nitriding process have been studied in terms of electrochemical polarization behaviors including corrosion potential(), anodic polarization trends, polarization resistance(), and also have been studied microstructures, hardness and specific wear of nitrided layer Nitrided layer showed an enhanced hardness values in all the plasma nitriding condition investigated. In the result of wear test, specific wear of nitrided specimens were much decreased than that of non-treated specimens. In the results of XRD, phase were detected in nitrided surface. And it was found that phase was decreased and was increased respectively, as the nitriding time became longer. In the test of corrosion resistance, natural potentials in all the nitrided specimens were towards noble directions than in the case of non-treated specimens. The measurement of electrode potentials revealed that corrosion resistivity of plasma nitrided specimens were higher than in the case of the non-treated specimens.

Abstract: Based on standard BP neural networks, the improved BP neural network is given with priority power value The model structure, BP algorithm, learning algorithm and the method assuring priority power value for the neural network are set forth Combined with the example of fault diagnosis for turbogenerator set, it is proved that the model has a strong ability of fault recognition from two sides, single fault and multi faults, and the diagnosis results are accord with the facts

Abstract: This study is to investigate the wear behaviors of thermally sprayed ceramic coating by a pin-on-disk wear testing machine. The test specimens were plasma sprayed TiO2 coating material on carbon steel substrate(S45C) with Ni-4.5%Al alloy bond coating. Wear characteristics, friction coefficient and w...

Abstract: For the evaluation of a flaw in a welded stainless steel by the Time of Flight Diffraction(TOFD) Method, we have made the reference specimen for experimentation. As a result, we could analyze a specific character and the inner state of the structure in a welded stainless steel and we came to the conclusion as followed. (1) For analyze the structure state of a section in a welded stainless steel through the optical microscope, we could have analyzed the generated shape and the location of a flaw and the inner parts of the structure state through the microscope of eighty magnification and two hundred magnification about the soundness, the heat affected zone(HAZ) and the welded part. (2) Through the comparison with the shape and the size of a flaw in the welded part about the conventional ultrasonic test and the TOFD Method, we could make an observation the special character of the TOFD Method and principles. (3) We analyzed and collected the merit of the TOFD Method on the basis of the experimental result by the shape and the size of a flaw in the inner welded parts. So, we made up a base that we could use as a basic data for a similar flaw like that. Through the study as mentioned above, we could make an observation the flaw detective method and principles used in the TOFD Method.

Abstract: The property, composition, characteristics and conventional handling methods for the slag in dry and semi-dry FGD technology and their comprehensive utilization both at home and abroad are introduced.

Abstract: Soft-sensing technique in process industry is introduced. General theory and methods about building a soft-sensing model are given. Problems related to soft-sensing technique in coal-fired power plant are discussed. Analysis of two implementation instances show that soft-sensing is an effective way to solve problems in sensing and control of complicated process variables.