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This paper introduces an inductosyn angle measurement system based on resolver-to digital converter chip AD2S80A and FPGA. To improve the accuracy of angle measurement, a low noise signal process circuit is designed, and amalgamation and compensation of the coarse-fine channels are discussed. Experimental results indicate that the measurement accuracy is within 1" by using this method, which...
Power electronic systems do not always operate under ideal condition because of the conflict between computational efficiency and simulation precision. In addition, there is significant computation burden in real-time simulation of voltage source converter closed-loop control. Hence, the power electronic real-time co-simulation design based on FPGA+DSP+PC architecture is put forward. The design adopts...
The commercial embedded microprocessor requires to be authorized, which increases the cost of the chip. The free embedded microprocessor soft-core is of poor portability, which causes difficulty on system design. In order to solve the above problems, this paper introduces an improved IP core base on ARMv4 instruction set. With an independent architecture, the IP core possesses good portability and...
An efficient implementation of discrete wavelet transform (DWT) in JPEG2000 is designed with low memory and high pipeline architecture. Considering the limited dynamic range of wavelet coefficients, a modified scheme of integer-to-integer discrete wavelet transform based on fixed-point manipulation is proposed by preserving efficiently fractions of coefficients in lifting steps. This scheme ensures...
Image correlation tracking is one of the key factors to reach its 0.1" spatial resolution, the diffraction limit of the 1 m optical system on space solar telescope (SST). Correlation operation is implemented in correlation tracker (CT) which can detect the sub-pixel displacement and also correct it. So adopting a suitable implementation method is the role of CT. In this paper, an efficient design...
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