| PRECISION INSTRUMENTS AND MECHANOLOGY |
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Design of PCI express real-time measurement and control platforms for MEMS gyroscopes |
| ZHOU Bin, QIU Zhichang |
| Engineering Research Center for Navigation Technology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China |
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Abstract APCI Express (PCIe) real-time measurement and control platform was developed for micro electro mechanical system(MEMS) gyroscopes. The PCIe, the field programmable gate array (FPGA) driver and the delay link were optimized and accelerated to give closed-loop control of the gyro for both the driving frequency and the driving amplitude. Consequently, the linear vibration gyroscope operates at the resonant frequency and the amplitude is stable. The real-time performance and stability of the measurement and control system are analyzed. The FPGA hardware was optimized for the PCIe bus transmission. The single readout time was reduced to 1.8 μs by accelerating the bus transmission control and the PCIe IP core interface control. The driver was streamlined to reduce the data transmission delay between the kernel layer and the user layer. Efficient data transmission timing control stabilized the data transmission. The gyroscope operating frequency was then stable at 100 kHz.
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| Keywords
micro electro mechanical system (MEMS) gyroscope
PCI express
field programmable gate array (FPGA)
real-time
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Issue Date: 15 December 2017
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2017,
Vol. 57
