Advanced Materials Research Vols. 588-589

Abstract: This paper takes the virtual reality technology as a core, has established the housing virtual reality roaming display system, Under the premise of the detailed analysis of system architecture, We focus on how to form the terrain database and the scenery three-dimensional database by using the MultiGen Creator, and call OpenGVS through MSVC to carry on the real-time scene control and the method of the complex special effect realization.

Abstract: In order to improve the ability of the Battlefield Situation Awareness, US and NATO allies designed the new Mark XIIA Mode 5 IFF system. Aiming at the problem of modeling and simulation of Mark XIIA Mode 5 IFF system, this paper constructs simulation model of Mark XIIA Mode 5 IFF system based on Simulink platform. Simulation waveforms and error code rate analysis are given. Experimental results show that the modeling method is effective.

Abstract: Fuze is an important component element of penetration weapons, for fuze tests in shot fields are expensive and can’t grasp the entire process, therefore a method of simulating the projectile penetrating into concrete target using Virtual Instrument Software LabVIEW combined with computer simulation is proposed here. Firstly the constitution of the hardware-in-the-loop simulation system is introduced, then the variation of acceleration when projectile penetrates into concrete is imitated, finally the whole system is tested, and the results indicate that the system can simulate the process of projectile penetrating into concrete target precisely and reliably.

Abstract: In this paper, the binocular stereo system is applied to intelligent vehicle. A series of simulation tests have been carried out. Two CCD video cameras with the consistency of parameters and performance are applied in the tests to acquire image synchronously. In order to achieve the performance of real-time and accuracy, Hough Transform is applied for edge detecting and SURF algorithm is used for image matching. After image binarization, edge detection and image matching, we can calculate the parallax of the two corresponding images, and then get the distance and relative velocity of the obstacle. Satisfactory results have been achieved in comparison with the reality.

Abstract: For the pose measurement of cannon barrel, a vision method through checked plane had been proposed. To test and improve the precision of this new method without considering the hardware error and some other inextricable objective factors，derive the imaging model of the marker (checked plane) from motion model of cannon barrel and the position relative to it using variable-controlling method. Establish the computer simulation platform of vision measurement system for cannon barrel pose based on C++ Builder. The simulation experiment validate the veracity and dependability of this method.

Abstract: In this paper, we study the building air-conditioned room in the small space and establishment the mathematical numerical simulation model which is for the designing and energy saving of the air distribution, We analysis the energy effect on five types of the airflow organization based on simulation software developed by our research team to study the designing and energy saving of the air distribution, and the results show that considering both the two ways of the air distribution is more reasonable and energy-efficient.

Abstract: A new approach is introduced to establish the simulation and training system for X-type missile tail test based on the platform of C8051F020 SCM by adopting virtual closed-loop control technology. This paper expatiates on the event-driven engine technology applied in SCM system, which can help to improve the efficiency of programming, strengthen the reliability of the program and therefore reduce the cost of research and development. It has some value of direction and reference for research and development of similar simulation and training devices.

Abstract: To make a high efficiency surface-to-air missile system is a mainstream in world naval fleet combats under the condition of high technology, which makes the effectiveness analysis of such system very important. While the existed model is found not to fit for the missile in service. Thus, based on the analysis of combats process of the surface-to-air missile system and the theory of discrete-event simulation, the model is constructed by using Entity Flow Chart, the simulation time is advanced by using Event Scheduling, the simulation result is also given with mathematical statistics method. Finally, the paper discusses the problem of model applicability.

Abstract: During the splicing process of pneumatic splicer, the principle of yarn splicing is closely related to the flow field inside the splicing chamber. This paper presents a numerical simulation of the flow char-acteristics inside the splicing chamber of the pneumatic splicer. A three-dimensional grid and the realizable tur¬bulence model are used in this simulation. The numerical results of veloc¬ity vectors distribution inside the chamber are shown. Streamlines starting from the two air injectors are also acquired. Based on the simulation, the principle of yarn splicing of the pneumatic splicer is discussed. The airflow in the splicing chamber can be divided into three regions. In addition, the simulation results have well sup¬ported the principle of yarn splicing of pneumatic splicer claimed by the splicing chamber makers.

Abstract: In order to improve reservoir fluid recognition, sensitivities of array induction response to different invasion properties in both oil-bearing layer and water layer are analyzed. A numerical algorithm is adopted to simulate time-lapse response of array induction logs during mud invasion and signal processing of the array induction log is developed. Features of array induction responses during mud invasion were researched. A “five-parameter model” (r1, r2, Rxo, R_1/2, R_t) which can match a variety of invasion conditions is approached and carried out suing a fast invasion method. Therefore, the identification of fluid type can be realized effectively by inversion of array induction log combined with time-lapse responses of array induction log. It is demonstrated that the inverted resistivity presents a typical non-monotonic variation in oil-bearing layer and a monotonic variation in water layer, which agrees well with the actual invasion property. It provides quantitative information for the discrimination of oil/gas or water zone.