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This paper describes preliminary research on Control Rod Drive Mechanism(CRDM) control system in the project TMSR nuclear energy system. In the control scheme which was dedicated to improve system reliability and safety, fully-digitized design and application of redundant CPU were optimal choices. CRDM control system was composed of Siemens PLC modules, stepper motor and its driver, touch panel and...
In this paper, an improved carrier estimation method used in coherent demodulation of MPSK signal is proposed, which is based on zoom FFT and frequency domain interpolation. The carrier is estimated approximately in time-frequency field through nonlinear transformation and zoom FFT, then it is distilled accurately by intervene in frequency domain. Simulation results show that the algorithm has a higher...
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