Optimal Control System for UPFC

This paper first analyzes the internal dynamic process of the UPFC,then a five order differential equation is presented to describe dynamic behavior of UPFC. In term of this,a optimal control system is designed.Dynamic simulation of a transmission system demonstrates the effectiveness.     

Optimal Control of Semi-Active Suspensions with ER Shock Absorber

An ER shock absorber with mixed mode is designed and its mathematical model is built. The optimal control method with LQ is applied to semi-active suspension systems in vehicle. A optimal output tuner is designed on basis of 1/4 dynamic model and the characteristics of the ER shock absorber. Its aim function and the weighting parameter matrix are determined. The feedback gain vector is found from solving the Algebraic Equation. The result shows that the optimal controller could not only diminish the body acceleration effectively but also improve the ride and handling characteristics. The construction of the ER shock absorber is reasonable and its performance meets the optimal control requirements of semi-active suspension system under the 3 kV/mm. In additional, the optimal control has low cost and energy consumption as well as rapid response . Such a system can meet with the requirements of semi-active suspension control completely.     

Optimal Design of Plane Cascades Based on Wavelet Theory

Based on the optimal control theory and Lagrange interpolation an optimal design model of plane cascades of 3D blade in an arbitrary surface of revolution is established. Using wavelet theory to solve the model, and lots of numerical results are obtained. The results show that the wavelet method is more effective than the conventional methods.     

Pretreatment of Coke Oven Waste Water with Blast Furnace Sludge Method and Blast Furnace Sludge Plus Scrap Iron Method

Coke oven waste water is respectively pretreated by blast furnace sludge method and blast furnace sludge plus iron scrap method, the effects of pH and the quantity of materials and treatment time on the removal efficiency of COD are analyzed. The results indicate that blast furnace sludge plus iron scrap method is superior to blast furnace sludge method .The treatment time and pH can greatly affect on the removal efficiency of COD using blast furnace sludge plus iron scrap method. The treatment time after 30 minutes and pH have no remarkable effects the removal efficiency of COD using blast furnace sludge method. The removal efficiency of COD increases with the increase of blast furnace sludge and iron scrap, but the increase rate decreases gradually.     

An Application of Hamilton-Jacobi-Bellman Equation in Optimal Investment

The simple portfolio investment model is given, with the HJB equation. The optimal portfolio investment problem is discussed under some given supposition, the quantitative relations are gotten between the investment strategies and riskless investment income rate and risk investment income rate are gotten. And with the quantitative relations, we study the qualitative relations between the investment strategies and riskless investment income rate and risk investment income rate. This also accounts for the effect of the falling interest rate of RMB on the national economy.     

An Optimal Combinatorial Forecast Method in for Future Profit of Assets

This paper presents an optimal combinatorial forecast method for the future profit of assets.     

Temperature Control System of the Polish Liquid on Cool Machining Optics Components

In order to improve productiveness, the liquid temperature should be maken arrive predetermine value as short time as impossible, and controlling accuracy should be ensured at the same time. For the purpose, an optimum scheme of dynamic heating in all process is presented. The power of electronic stove is chosen according began and end temperature,volume of the heated object, for which the paper established the optimum control model of dynamic heating. Based on the model, the system has been manufactured. The experimental results show that the system is better in fast temperature rising,small over adjusting and high precision.     

Research and Application of Temperature-field Digitalizing of the Tuyere and Raceway Section in Blast Furnace

It is useful for diagnosing coal combustion status and the tuyere and raceway in blast furnace, at the same time, it is supervision running state to study on temperature-field of also helpful for supervising the structure of oxygen and coal burning apparatus, improving coal combustion technology and coal injection operation. The model between red and green information of true color flame image and temperature is established and two dimension raceway section projection temperature-field are achieved by applying no-touch radiation temperature measurement theory and technology. It is proved with experimentation that the method is effective and feasible, and the testing precision can reach 98.09% compared to the testing result of thermocouple of taking out gas.     

Effect of UPC on Energy Distribution and Blast Furnace Smelting Process

The effect of UPC on energy distribution and each smelting index of blast furnace smelting process under a large amount of injection coal with oxygen enriched by an energy management optimizing and expert prognosis system is discussed.[WT5HZ]     

Research on Fuzzy Control Based Two-level Handstand Pendulum System

The two-level handstand pendulum system based on fuzzy control is designed. It is impossible to adopt classical control theory, for the mathematical modeling of the system is nonlinear, the fuzzy control is proposed to improve the former linear control algorithms. For the key to fuzzy control is control rule, it becomes most important to design suitable fuzzy rules. Two methods, one based on experience and the other based on system simulation, are presented to set u Pan effective rule base. The practice proves that the control result is of well stability. A control example for two-level handstand pendulum system shows that the control law is efficient and more robust than the classical state feedback optimal control law with respect to errors produced by the external disturbances.     

水稻稻瘟病防治方法研究进展

稻瘟病是水稻三大病害之一,生产上对稻瘟病的防治没有特效的方法。为了对未来水稻稻瘟病在生产实际应用上提供一些参考,分别从化学防治、抗性品种培育、生物防治、栽培管理方法等方面概述了水稻稻瘟病防治方法相关研究进展。分析了化学防治、抗性品种、生物防治、栽培管理在生产应用上的利弊,指出了抗性品种选育、合理栽培管理技术和高活性生物农药三者综合利用将是防治水稻稻瘟病有效的措施。     

Optimal design on the hydraulic system of CVT based on response speed and tracking accuracy

Aiming at speed ratio’s lag, tracking deviation and pulleys’ slipping and over clamping during clamping force control of CVT (continuously variable transmission) hydraulic system, corresponding optimal design methods are employed based on the practical structure of speed ratio control and clamping force control system, and the speed ratio control and clamping force control are employed by the optimal design of the system’s structural parameters. Combine with vehicle’s start-up working condition, simulation analysis is carried out on the platform of AMESim. The analysis results show that the dynamic characteristics and precision of tracking deviation are improved by the optimal design system.     

Dynamic Control Arithmetic and Modeling of Secondary Cooling System for ROKOP Billet Continuous Casting

A dynamic control arithmetic and mathematic model of secondary cooling system for ROKOP billet concasting has been developed in view of the changes of casting speed during concasting process and the high fluctuation of surface temperature due to the use of static control method. By means of computer simulation and by comparison between static and dynamic control method, it proves that the latter one is more adaptive to the changes of casting speed, which leads to lower fluctuation of surface temperature.     

Study on Reasonable Burden Structure of Smelting Vanadium Titaniferreus Magnetite in Blast Furnace

Under the condition of imitating the smelting process.the investigation has been carried out to the properties of melt dropping behaviours and reduction for several kinds of vanadium titaniferrous magnetites,such as sinter,pellet and lump ores;and especially the relation between the mineral constitute basicity of ores and its high temperature metallurgical quality is studied with its influence on the reduction process at the low and high temperature zones and the titanium reduction. So the reasonable burden mixture of smelting vanadium titaniferrous magnetites is high basicity sinter and acidity pellet. However,with the existing conditions of the steel plant.it is essential to improve the basicity of the sinter.     

Research on the Method of Water Pollution Control Planning

The definition, history and development process of water pollution control planning are introduced in this paper. The new methods of water pollution control planning based on GIS and ANN technology are introduced as well. At present, the water resources shortage and water environment pollution have restricted the development of the society and economy, so the improvement of the standard of water pollution control will be benefit for the sustainable utilization of the water resources.     

Recent Research on Supervision Running State of the Tuyere and Raceway in Blast Furnace

The manipulators pay fully attention to the running state of raceway looked into tuyere peehole in blast furnace in its production process. And it is important for judgement and control the blast furnace. The pulverized coal feeding and burning cases can be supervised by peehole in tuyere. Temperature distribution can be studied by brightness and numerical simulation of pulverized coal combustion. The recent research of temperature examined and supervision technique of the tuyere and raceway in blast furnace are set forth at home and abroad. A method settling supervision and control the state of tuyere and raceway in blast furnace is put forward by coalescent numeric image process technique to numeric simulate two dimensional imaging technique.     

The Effect of Furnace Surface Roughness in a Fine Particle Fluidized Bed on Fluidizating Qualities

Experimental Study on the effect of fine-granular fluidized bed's furnace surface roughness on (quasi) dispersion fluldhatinn properties was included in thiS paper.The particlesof diameter from 0.076 to 0.45 mm were used in the test.With different kinds of furnace linersand a resistant measuring device made by ourselves,the relations among surface roughness,the distribution and the thickness of fluidizating dead zone near the surface were got.Considering measuring results of coefficients of friction between fine particles and different kinds of furnaces,a theoretical analysis on the relation was made.The researching results showed that a rough surface might result in thicker fluidizd atate deadzone and lead to fluidization change from aggregative fluidizationinto dispersion fluidization more quickly.