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您的检索式：作者名="Chengjin An"
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| 1 | Adaptive link layer security architecture for telecommand communications in space networks显示文摘Impressive advances in space technology are enabling complex missions, with potentially significant and long term impacts on human life and activities. In the vision of future space exploration, communication links among planets, satellites,spacecrafts and crewed vehicles will be designed according to a new paradigm, known as the disruption tolerant networking. In this scenario, space channel peculiarities impose a massive reengineering of many of the protocols usually adopted in terrestrial networks; among them, security solutions are to be deeply reviewed, and tailored to the specific space requirements. Security is to be provided not only to the payload data exchanged on the network, but also to the telecommands sent to a spacecraft,along possibly differentiated paths. Starting from the secure space telecommand design developed by the Consultative Committee for Space Data Systems as a response to agency-based requirements, an adaptive link layer security architecture is proposed to address some of the challenges for future space networks. Based on the analysis of the communication environment and the error diffusion properties of the authentication algorithms, a suitable mechanism is proposed to classify frame retransmission requests on the basis of the originating event(error or security attack) and reduce the impact of security operations. An adaptive algorithm to optimize the space control protocol, based on estimates of the time varying space channel, is also presented. The simulation results clearly demonstrate that the proposed architecture is feasible and efficient, especially when facing malicious attacks against frame transmission. | Lei Zhang Chengjin An Susanna Spinsante Chaojing Tang | 2014 | Journal of Systems Engineering and Electronics2014，25，3： | 3 |
| 2 | DESIGNING OF TWO NEW FUZZY CONTROLLERS WITH ERROR INTEGRAL AND THEIR APPLICATIONS IN FOLLOWING CONTROL OF WARSHIP-GUNS显示文摘Two new fuzzy controllers are designed,one's control rules are adjusted by error integral,another are with feedforward of error integral. If only the control rules and parameters are selected felicitously,the static errors of the system will be eliminated. The test results show that the controllers can assuredly improve static performances of the controlled system. | Zhou Lianquan Jiang Hong Wang Jun Wang Xiaochun School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaZhang Chengjin Shandong Academe of Electric Power | 2002 | Chinese Journal of Mechanical Engineering2002，15，2： | 0 |
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