高可靠硅压力式静压信号处理电路设计与实现
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V19

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The Design and Implementation of Silicon pressure staticsignal processing circuit With High reliability
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    摘要:

    硅压力式静压高度控制器是返回舱在指定高度完成开伞的保证,静压信号处理器是硅压力式静压高度控制器的重要组成部分,对接收到的硅压力传感器信号进行处理,得到控制开伞点的开关量信号。硅压力式静压信号处理器电路包括电源电路、电压跟随电路、基准值比较电路、光耦隔离电路和三取二开关电路五部分。为提高电路性能,对部分电路的结构和参数进行优化,通过优化前后调试结果比对研究了减小浪涌电流、抑制电源纹波、提高抗干扰能力的方法,并通过仿真计算研究了电路可靠性。结果表明限流电阻能够抑制浪涌电流;LC滤波能够减小电源纹波;依据基准值比较电路迟滞宽度计算公式,合理调整电路阻值,可以增大迟滞宽度;三取二逻辑判断具有较高的可靠性。可见电路参数微小的调整,可以影响电路性能的合理性,最后可以得出,优化后的电路设计合理、改进措施有效。

    Abstract:

    The Silicon Static Pressure height controller is assurance for a lander to open umbrella at specified height. The Static Pressure Signal Processor is an important part of The Silicon Static Pressure height controller, it can provide switch signal for opening umbrella by processing the signal from the Silicon Pressure sensor. The Static Pressure Signal processor is composed with Power circuit, Voltage follow circuit, Base value comparison circuit, OCEP isolation circuit and Three-in-two switch Circuit. In order to improve circuit performance, the structure and parameters of some circuits was optimized. The comparison of debugging results before and after circuit optimization was used to investigate the method of reducing surge current、suppressing power ripple、improving anti-interference ability. At the same time, simulation calculation was used to investigate the circuit reliability. The results show that: the current limiting resistor can suppress the surge current; LC filter can reduce power ripple; the hysteresis width can be increased by adjusting the circuit resistance according to the hysteresis width calculation formula of the reference value comparison circuit; Three-in-two logical judgment could improve the reliability of the system. It can be seen that the small adjustment of circuit parameters can affect circuit performance. Finally, we can get that the optimized circuit design is reasonable and the improvement measures are effective.

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周朋,张兴宇,刘靖雷,等. 高可靠硅压力式静压信号处理电路设计与实现[J]. 科学技术与工程, 2021, 21(9): 3840-3847.
Zhou peng, Zhang Xingyu, Liu Jinglei, et al. The Design and Implementation of Silicon pressure staticsignal processing circuit With High reliability[J]. Science Technology and Engineering,2021,21(9):3840-3847.

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  • 收稿日期:2020-06-20
  • 最后修改日期:2021-03-20
  • 录用日期:2020-09-19
  • 在线发布日期: 2021-04-19
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