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Chen X.-P.,Institute of Astronautics and Aeronautics | Li T.,Academy of Equipment Command and Technology
Yuhang Xuebao/Journal of Astronautics

The rotating consensus control problem of a multi-agent system is investigated in this paper. A new control protocol with time-delay is proposed. With the help of Lyapunov theory, the stability analysis of the closed-loop system is performed and a condition is derived to make all agents achieve a desired rotating consensus with switching topologies and time-delay. Finally, a numerical example is included to illustrate obtained theoretical results. Source

Wu S.,Institute of Astronautics and Aeronautics | Qin K.,Institute of Astronautics and Aeronautics
Proceedings - 2012 International Conference on Control Engineering and Communication Technology, ICCECT 2012

With the modulation mode complexity and signal bandwidth increase, more rigorous requirement has been brought out to the sampling clock circuit of real time wide-band spectrum analyzer in order to achieve high performance of specifications, such as EVM. In this article, the author has analyzed the performance impact of sampling clock jitter to high speed sampling clock circuit, and by ADIsimPLL simulation, give out an implementation of high performance sampling circuit that meet the design requirement. © 2012 IEEE. Source

Han Y.,Institute of Astronautics and Aeronautics | Qin K.-Y.,Institute of Astronautics and Aeronautics
2010 International Conference on Communications, Circuits and Systems, ICCCAS 2010 - Proceedings

A new approach with which we can control YTO and synchronization is introduced in this paper. This new approach takes advantage of the characteristics of FPGA (such as high speed and stability, etc.) to regulate the output frequency of YTO smartly and control the synchronization between different modules precisely. The experiment proved that this approach can meet the requirements of super-heterodyne high-speed real-time test measurements by downloading different FPGA program. The approach has been successfully used in communication analyzer; meanwhile, it can be extended to the microwave radio frequency spectrum analyzer, frequency synthesizer and signal generator module. © 2010 IEEE. Source

Peng F.,Institute of Astronautics and Aeronautics | Liu Q.,Institute of Astronautics and Aeronautics | Li Z.,Institute of Astronautics and Aeronautics
ICACTE 2010 - 2010 3rd International Conference on Advanced Computer Theory and Engineering, Proceedings

A new DC-DC converter PWM (Pu15e Width Modulation) algorithm is presented in this paper. In contrast to the conventional voltage-error-based PWM PI (Proportional-Integral) controller, inductor current controller is implemented as the derivative action of PID control to stabilize the dynamic behavior of the system. Back-Propagation neural network (BPNN) is applied to optimize the Pseudo PID parameters. A boost converter is modeled and simulated, to which the novel PWM Pseudo PID controller algorithm are applied. Simulation results demonstrate that the algorithm not only improves the accuracy but a15o provides a method to regulate the power of the power stage. © 2010 IEEE. Source

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