Applied Mechanics and Materials Vols. 236-237

Abstract: For the vehicle, lightweight means low fuel consumption. and small quantity of exhausted gas. In this paper by using the finite element method, the author established the model of the truck side framework. After meshing, exerting constraint, loading and calculating through finite element analysis software,the author obtained the deformation of the component. By researching changes of the stress and strain in X, Y, Z three directions of the component,the author obtained chart of the stress and strain. By using the method of arithmetic, the author defined the internal dimension as design variables, the equivalent stress and the deformation as the state variables, and quality as the objective function to get the lightest side wall frame of the vehicle on the premise of warranty of the intensity and stiffness.From the result, we can see the framework after optimal design is still very strong to resist the stress and the deformation.

Abstract: In This paper, in the background of a plate milling system in China, various influences on mill pacing in plate rolling are taken into consideration, a plate model by using the objective optimization theory based on the field statistics are introduced. This model based on the differential evolution, that establishes the objective function of rolling quality-temperature waiting time-rolling time, and uses concurrent optimization for the plate rolling of various needs. The results could get a series of Pareto sets to content the different requirements of determining the contiguous slab’s out-stove time interval. Lastly, the test examples are simulated to check up, the Pareto sets are calculated, and the result shows the method is effectiveness.

Abstract: The improved MT-NT combination method has solved the issue of failure or interrupted of solving when it is used in the Petroleum chemical enterprise production process. In this paper the judgment of the variable coordination credibility was added, corresponding processing was made in the measurement, and a more cautious handling was taken on the measured variable that may cause significant error. The experimental results show that this method is more suitable for application and actual production process. The MT-NT combination method has a higher accuracy and integrity in the detection of significant errors, with the advantage of both eliminating the defect of missing appreciable error and improving the calibration results. As a result, the method is more suitable for application and actual production process.

Abstract: Experimental study on the structure and characteristics of cooling circuit of full-aluminum parallel flow gas cooler. The experimental tests on the built cell-type and ternary GCMCPF are conducted. In the heat transfer processes of the cooler with different circuit structures, the impact of CO2 refrigerant side flow resistance and the mass flow on the heat transfer performance of gas cooler is measured. The results show that the ternary type GCMCPF structure can enhance the heat transfer for CO2 fluid at the weak heat transfer area in the cell-type GCMCPF. Within a certain range of mass flow, the former heat transfer is 1.5 times the later one, and the structural sizes of GCMCPF can be reduced in the same requirements for heat transfer.

Abstract: In order to increase the density of guided rockets, a passive control method was proposed to reduce the trajectory dispersion caused by initial disturbances, thrust misalignment, vertical wind, etc. at the end of boost phase. The basic principle of passive control method was introduced briefly, and then the disturbance motion equations for the rocket projectile were established. The effective conditions to implement passive control on guided rockets were put forward. A technical scheme of installing elastic sabots on rocket projectile was proposed to realize passive control and a simulation was conducted. The simulation results indicate that the passive control scheme can effectively decrease the velocity direction deviation caused by various disturbances factors at the end of boost phase.

Abstract: To estimate the flight attitude angles of Guided Projectile rapidly and accurately to realize the precise control, angular motion equations and MEMS gyroscope measurements were used to build the state equation and the measurement equationcombined withthe ballistic priori knowledge. Based on the unscented kalman filter for nonlinear system, an approach of estimating the attitude angles of Guided Projectile was proposed. Taking a certain type of Guided Projectile as an example, the data of triaxial angular velocities with the measurement noise was considered as the output signal of MEMS gyros, and considered the calculated ballistic data as the ballistic priori knowledge. Through the approach proposed in this paper, the above were used to obtain the estimates for attitude angles. The results indicate that, it’s feasible to obtain the attitude angles by angular motion equations and gyros. On account of the actual random noise signal of gyros, the accuracy of the estimated attitude angles can meet the requirement of trajectory control system for Guided Projectile.

Abstract: Introduction of a intelligence control system of remote temperature & moisture adjustment based on single-chip computer. It explains hardware flow diagram, module structure and system software process flow diagram based on principle of power line carrier transmission and humiture control. With STC12C5404ADsingle chip computer and DHT21 as main control chip and humiture collection chip, the system hard ware is characterized by efficient and strong capacity of resisting disturbance compare to traditional humiture checking system.

Abstract: Shape Set Up (SSU) system is the key technology for Hot Strip Mill (HSM). Precise SSU system is applied to improve the strip quality for HSM. The function of SSU, Setup and Feedback, is introduced. The main mathematic model of strip profile is set up. SSU system strategy is studied of a certain domestic 1700mm HSM. The SSU system is carried out in produce and the measurement data show that strip flatness deviant and strip profile deviant could be controlled in target scope. The study has set a sound base to improve the setting accuracy and develop SSU system for HSM further.

Abstract: According to the analysis of papermaking process, combined with the principle of cross-directional basis weight(BW) detecting and controlling, predictive function control based on CARMA(Controlled Auto Return Integral Moving Average Model) model is proposed to solve the problem of time delay, nonlinearity and uncertainty of the multi-dimension system. Simulations show that multivariable predictive functional control algorithm for fast tracking velocity, good dynamic performance, and it can effectively reduce the mutual coupling effects between variables. The method has the feasibility of applying to practical papermaking process.

Abstract: Airplane assembly process is a large system of multi-departments collaboration and multi-disciplines integrated application, and it would be influenced by various factors in quality and efficiency. The successful application of monomial technical must rely on the whole assembly process of effective supply chain control system and the environment. This environment from the design process to material distribution throughout the whole process of airplane assembly, and through digital measuring coupling detection model and real, completes quality closed-loop control in assembly site. The environment is a multi-level efficient integration of planning, technology and logistics, affects the overall efficiency, and plays a very important position in assembly process.