Key Laboratory of National Defense on Aerospace Flight Dynamics Technology

Beijing, China

Key Laboratory of National Defense on Aerospace Flight Dynamics Technology

Beijing, China
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Yang C.,Key Laboratory of National Defense on Aerospace Flight Dynamics Technology | Yang C.,China Aerospace Science and Technology Corporation | Zhou J.,China Aerospace Science and Technology Corporation | Tang G.,Key Laboratory of National Defense on Aerospace Flight Dynamics Technology | And 7 more authors.
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2015

Scene simulation technology has gained a vast range of application in many different fields, such as aerospace measurement and controlling, by displaying the mission process and flight status in 3D real-time graphics interactively, which provided a comprehensive and intuitive controlling platform. The lunar exploration has been implemented with unmanned lunar rovers to detect the environments of the moon. Tele-operation was adopted to control the whole process by making and sending detecting plan and programming to the rover, in which the position of the sun was the key constraint condition. An effective real-time soft shadow map algorithm was presented to visualize the geometry relation between the rover and the sun directly. The shadow map from the light view was generated. The key pixels on the edge of shadow were classified into five types for further procession according to its neighbours. Then the bilinear smoothing was used to remove the aliasing on the edge of shadow. This improved method was applied to generate the shadow of the scenario including a lunar rover and the moon ground. The results and experiments indicate that the algorithm produces a good soft shadow with real-time effect for dynamic scenes. © 2015, The Editorial Board of Journal of System Simulation. All right reserved.


Cheng Y.,China Aerospace Science and Technology Corporation | Cheng Y.,Key Laboratory of National Defense on Aerospace Flight Dynamics Technology | Zhou J.,China Aerospace Science and Technology Corporation | Deng Y.,China Aerospace Science and Technology Corporation | Wei Z.,China Aerospace Science and Technology Corporation
Proceedings of the 2015 27th Chinese Control and Decision Conference, CCDC 2015 | Year: 2015

We are developing teleoperation approach to timedelayed remote driving. This paper presents a complementary technique based on Virtual Reality for teleoperation with the communication delay between the Moon and the Earth. A realistic virtual environment and manual driving system was built with displaying and driving device. Combining the 3D terrain and telemetry, the full scene of rover mission can be generated virtually. Up on that, using driving device, the rover path can be planned on the virtual system directly and sent to the vehicle. When the rover moves on the ground or probes some interesting stone using this manipulator system, we can monitor the whole process in real time. The intervention order can be transmitted to the rover at any time if it is necessary to change the control plan. Using this manual controlling method, we can control the rover on the Moon just like playing a car race game. This online control platform can greatly improve our efficiency and emergency controlling ability. © 2015 IEEE.


Yang C.,Key Laboratory of National Defense on Aerospace Flight Dynamics Technology | Yang C.,China Aerospace Science and Technology Corporation | Tang G.,Key Laboratory of National Defense on Aerospace Flight Dynamics Technology | Tang G.,China Aerospace Science and Technology Corporation | And 4 more authors.
Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of Computer-Aided Design and Computer Graphics | Year: 2015

The atmospheric drug must be fully taken into account for accuracy orbit determining of spacecraft below 500 km. In this paper, a computer graphical approach based on the fundamental idea of shadow map is proposed to accurately calculate the cross section area of spacecraft. Firstly, the complex geometry surface of spacecraft is represented in the form of triangle grids, and the relative motion among spacecraft components is considered. Secondly, the shadow map algorithm is employed to project the spacecraft model onto a shadow plane, and then the cross section area can be found out by analysis the amount of shadow pixels in the shadow graph. The simulation and experiments are given to validate the proposed method and the results indicate that this method can deal with complex spacecrafts whose components have relative motion. ©, 2015, Institute of Computing Technology. All right reserved.

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