Junliang Han

Publications (2)0 Total impact

• Conference Proceeding: Implementation of Digital Detection Scheme for Closed-Loop FOG Based on DSP and FPGA

  Junliang Han, Shengmin Ge, Yi Shen
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  ABSTRACT: Digital closed-loop FOG detection scheme based on square wave bias and digital phase ramp feedback technique is introduced. A novel implementation of the detection scheme is developed with digital signal processor (DSP) and field programmable gate array (FPGA). Design and implementation of the detection system are discussed. Timing control and closed-loop signal processing and are implemented in FPGA. To restrain the random noise in the real-time system, an adaptive transverse filter is designed based on the least mean square (LMS) algorithm and is implemented in DSP for real-time filtering. Experiments and tests show that good performances have been achieved and the implementation scheme is of great practical value
  Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE; 05/2006
• Conference Proceeding: Modeling and Simulation of Digital Closed-loop Fiber Optic Gyroscope

  Junliang Han, Shengmin Ge, Yi Shen, Xiangjun Li
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  ABSTRACT: Computer modeling and simulation are important for the researches and applications of the fiber optic gyroscope (FOG). In the paper, the dynamic model and stochastic model of digital closed-loop FOG are developed. With a number of reasonable approximations, the nonlinear dynamic model is simplified into a linear discrete dynamic model. The digital control algorithm in the closed-loop control is analyzed, and the dynamic simulation is conducted. In the stochastic modeling, different stochastic processes are built to simulate the various types of random gyro noise. A novel method is investigated to simulate 1/f noise with the orthogonal wavelet transform. The stochastic simulations are conducted and the effectiveness of the stochastic model is validated with Allan variance analysis
  Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on;