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Drilling fluids are widely used in the drilling of deep wells to clean and transport the rock cuttings, maintain the sidewall of oil well, lubricate and cool the drilling bit, and control the formation pressures. The present work aims at improving the high-temperature resistance of water-based drilling fluid by using the newly synthesized fluid loss additive named PAASD. This copolymer was obtained...
For now, the research and implementation of dynamic terrain are all based on OpenGL. In order to realize virtual field experiments of agro-machinery in the Vega Prime virtual reality platform, a real-time visualization method of wheel ruts based on class vrGeometry in Vega Prime was proposed. Firstly, the small three-dimensional terrain is established in Multi gen Creator, the 3d terrain models of...
The design and development process of virtual experiment was analyzed in this paper. Then a virtual experiment system for agricultural equipment was founded by using MultiGen Creator, Vega Prime software and VC++ programming language. The system running process was introduced, together with tractor 3D modeling, operation data acquisition, dynamic modeling and drive, and collision detection. Furthermore,...
As special type of vehicle, agricultural equipment cab is more complex, with components for both driving and farming. Before designing agricultural equipment cab, the ergonomic characteristics and hierarchy were analyzed. Then the parameterized design method and virtual reality (VR) technology were studied, and the Virtual Design System of Agricultural Equipment Cab was established based on software...
In order to insure safety of driving vehicle in the driver assistance system and effective navigation in the automatic driving system, a new recognition method based on the neural network and the invariant moments for traffic signs was proposed in this paper. Firstly, the area of the traffic sign was located from the complicated image background. Secondly, the features of each traffic sign were obtained...
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