Simulation Technology Virtual Three-dimensional Vehicle Servo System

Stability, accuracy and rapidity are important symbols to measure the performance of servo system. It is one of the direction of the servo system development to improve the anti-disturbance capability and stability of the servo system in the state of motion, while simplify the design complexity about the mobile servo system. This paper makes full use of the advantages of the virtual simulation technology, which is applied the design and test of the mobile servo system, and it can reduce the difficulty of the system design, facilitate performance test and reflect directly test results. However, the research about the virtual simulation technology in the field of the vehicle servo system is less, so it has important theoretical significance and application value to study the three-dimensional virtual simula-tion technology about the vehicle.Based on Visual Studio2008software platform, used MFC framework and combined with OpenSceneGraph three-dimensional rendering engine, this paper simulates the operation of the vehicle servo system. According to the technical requirement, this paper designs the overall scheme of the whole system and plans the overall structure and function of the system. This paper uses harmonic superposition algorithm combined with Matlab software to generate three-dimensional terrain data, then simulate the actual ground conditions. It designs collision detection algorithm to realize the display which the car can run on the virtual terrain. It designs an event about the keyboard response to make the car present different attitude and designs CAN communication process by data conversion under two coordinates. It designs three-dimensional terrain based on the grid algorithm. It designs three methods about scene roaming, the trajectory of aircraft and the HUD display text. Finally, this paper debugs and runs the designed simulation system, and verifies the correctness of the generated data about azimuth and pitching angle.According to the technical requirements, the paper completes a three-dimensional virtual simulation of the whole vehicle servo system. By observing whether the firing line in the car will follow or not the aircraft and verifying the correctness of about the received azimuth angle and pitching angle by CAN bus to verify the rationality and correctness of the servo control algorithm. The sent data about azimuth and pitching angle by CAN communication provide experimental data under different road grades for the servo control algorithms, and lay the foundation for the design and performance test of the actual vehicle servo system.