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Articles by Shi Yufeng
Total Records ( 2 ) for Shi Yufeng
  Chen Hui , Zhou Chunjie , Huang Xiongfeng , Qing Yuanqing and Shi Yufeng
  This study presented an integrated management framework for the implementation of reconfigurable protocol stack in Networked Control Systems (NCSs). Reconfiguration is a vital capability to cope with protocol heterogeneity and environmental variations and growing attention has been focused on run-time automated management of complex functional entities of communication protocol stacks. Around the discussions on protocol reconfiguration, there is still lacking of a systemic method for NCSs, especially ignoring the performance verification and evaluation for the stack code replacement. Therefore, in this study, a high level modeling language-Specification and Description Language (SDL) was used to formalize the protocol stack. During the reconfiguration procedure, the formal specification was evaluated through running on a set of SDL performance models. And optimization operations would update the inefficient protocol stack till performance constraints are satisfied. Then, a binary coding rule was proposed to construct a design space for exploring reconfiguration parts of the formal protocol specification and generating the protocol configuration file. Besides, the standard ELF (Executable and Linkable Format) file was employed to support the runtime code loading avoiding unexpected linking overheads. The experiment showed that the management framework was efficiency for promoting the reconfiguration capability in communications of NCS with critical real time guaranteed.
  Shi Yufeng , Zhou Chunjie and Liao Zheng
  This study presents a Fuzzy Integral Sliding-Mode Control (FISMC) approach for the high precision motion control of Fourier Transform Spectrometer (FTS) based on Michelson interferometer. In this motion system, the system parameters are nonlinear and time-varying because of the mechanical design. To deal with these problems, a new control strategy which implies a FISMC for the speed loop and a Proportional-Integral (PI) control for the current loop is used to track the desired Optical Path Difference Velocity (OPDV) accurately. A Sliding-Mode Control (SMC) is designed to enhance the robustness of the system and reduce the influences of the time-varying disturbances. The integral in the sliding-mode surface is utilized to reduce the steady-state tracking error. Moreover, a fuzzy logic controller is served as a gain factor to suppress the undesired chattering introduced by SMC for the steady tracking. Finally, simulation and experimental results demonstrate the effectiveness of the proposed FISMC for the precision control of FTS.
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