Applied Mechanics and Materials Vols. 130-134

Abstract: With the analysis of traditional power quality monitor system, this paper introduces the system built by virtual instrument technology. From the power quality indicators and the measuring principles, we designed a data acquisition hardware based on the USB bus and developed the monitoring system applications using LabVIEW software. Comparing with conventional power quality monitoring system, the system overcomes the weaknesses of huge analog test devices. In this system, the intuitive interface makes operation simple with rapid response and small errors. In addition, statements and automatic alarm function is added to the software programming, which will be a great practical significance of the realization of automated monitoring.

Abstract: In this paper, pan-Boolean algebra for PID control concepts, methods and principles is proposed based on theory of Pan-Boolean algebra, Take the deviation of the control system, of the deviation, integral of the deviation as a pan-Boolean algebra PID controller’s input, for the different characteristics of the object and design of different control rules, we can get pan-Boolean algebra PID control algorithm; according to the system Indicators requirements, calculating simulation and optimization design of control algorithm parameters to achieve optimal control for system. The paper also proposed a three-dimensional coordinate system described method for system output response or the control parameters and deviation, deviation differential or deviation integral, this is a profoundly new tool for control system’s moving process features. The paper is important for PID control and application.

Abstract: By analysing the processing characteristics of varied diameter slender shaft parts, and according to the basic vibration theory of slender shaft, a production machine is designed,moreover, a solution with flexible hydraulic follower rest and elastic tailstock is adopted creatively. Experimental results show that this machine tools can effectively improve radial dimensional accuracy,surface quality and production efficiency of the varied diameter slender shaft parts and it has a wide range of engineering significance.

Abstract: This paper aims to provide an optimum design for the grab bucket on the port, analyze the parameters related to its grabbing function from static aspect. Taking the minimum grabbing moment as static elevation indicators, a nonlinear multi-variable optimization model was established taking the grabbing torque as the objective function. A function atlas was drawn on this purpose. The Matlab GA toolbox has been used in optimal design of the key parameters of grab bucket which used to be designed according to experiences, to improve the grab torque which leads to better performance and the higher efficiency of the grab bucket .In the end, an case was studied to demonstrate its effectiveness.

Abstract: Multi-parameters data perturbation method is a kind of original data perturbation methods for privacy preserving association rules mining. However, the time-efficiency of restoring the frequent itemsets in multi-parameters perturbation algorithm is still not high.One method is proposed in this paper to improve the time efficiency of multi-parameters randomized perturbation algorithm according to the characteristics of the model to restore frequent itemsets. The method improves the time efficiency by getting the elements of the first line of the inversed matrix of transformation matrix. Finally, both theoretical analysis and experimental results show that the improved algorithm is more time-efficient and space-efficient than the original algorithm.

Abstract: A simulation system consisting of display module, control module and process module for general aviation (GA) primary flight display (PFD) was designed in this paper. Realized with GL Studio, the system can receive, process and display the flight information as while as response to the operator’s control in real time. The testing results indicate that the system has good interactivity, stability and real time property which meet the requirements of simulation. The system can be widely used in GA avionics design and simulation training.

Abstract: This paper presents the development of a novel nuclear radiation monitoring and detection system. With the lightweight and global positioning features, the implemented wireless nuclear detection node can easily be deployed to discover unusual or abnormal radioactivity and map the events. ZigBee-based multi-hop mesh communication is adopted between nuclear detection nodes. All wireless nuclear detection nodes are designed with two working modes, continuous operation and timing operation. The two modes can be switched at any specified time to save energy consumption. Meanwhile, the features of anti-jamming against 802.11 network of ZigBee technology are tested and evaluated.

Abstract: Computer simulation of the flame is difficult to achieve real-time and realistic problem, proposing a fire simulation method based on fluid model and GPU general computing combining. The method is based on the incompressible flame, low-density, non-sticky and so on. Semi-Lagrange method is using to solve the fluid equations, using volume rendering based on 3D texture to rendering the flame. Then, using the method of energy-spectrum of radiation to control the color of the flame, and using the GPU to accelerate in parallel, balance realistic and real time.

Abstract: Taking a new steel tube rotating mechanism as the research object, the model is simplified and the virtual prototyping model of the mechanism is established. The mechanism kinematics simulation is carried out with ADAMS simulation software. The motion law and state in two conditions are comparatively analyzed. Analysis results show that, in steel tube clamping stage the motion of the clip rod is of variable deceleration; And in rotating stage, mechanism is of accelerated rotation with variable acceleration when the cylinder input, while mechanism is of uniform rotation when the crank input； And then the cylinder is with positive and reverse swings throughout the movement process. The analysis results provide the basis for institution parameter selection and structure optimization design.

Abstract: Based on the studying on the palaeogeomorphic, the source provenance and it’s direction of the early Cretaceous Tenggeer formation in the south Slope area of Baiyinchagan depression of Erlian basin were studied in detail by many methods such as the analysis of rocks and minerals, rock fragment character ,seismic profile analysis, electric logging description, mud logging analysis, etc., for studying the distribution of the depositional system of this area. The research shows that there is mainly controlled by three direction sediment source regions in Xilin area of the south slope area of the Baiyinchagan Depression, which are from west southwest, south, and southeast. Provenance have favorable spatial combination with depositional system and determine the depositional system pattern of the Tenggeer formation.