石英挠性加速度计表头行为模型研究

Study of Behavior Model of Quartz Flexible Accelerometer Header

摘要: 针对石英挠性加速度计PID参数整定繁琐、读出电路新方案的验证平台搭建复杂等问题，开展了对石英挠性加速度计表头的工作原理以及数学模型的分析，设计了加速度计表头的行为模型。搭建了相应的验证平台，将所得的表头行为模型的开环阶跃响应与实际表头做对比，验证了该行为模型的正确性。将该行为模型与表头的读出电路进行联合仿真，实现了表头模型和读出电路的闭环，并分析了不同PID参数对系统的调节时间等闭环动态响应特性的影响以及在特定PID参数下系统的−3 dB带宽。本表头行为模型可用于研究表头读出电路的设计、整定读出电路的PID参数以及分析读出电路的性能指标等多个方面。

Abstract: For cumbersome tuning of quartz flexible accelerometer PID parameters, complex building of readout circuit’s new program verification platform and other issues, analysis of the quartz flexible accelerometer meter works and mathematical model was carried out, and accelerometers header behavioral model was designed. We set up the appropriate verification platform, compared the open loop step response of the resulting header behavior model with the actual header, and verified the correctness of the behavior of the model. A joint simulation was done combining the behavioral model with the read-out circuit header, to realize the closed loop of header model and readout circuit, and the influence of different PID parameters on the closed-loop dynamic response characteristics such as system accommodation time, and −3dB bandwidth of particular PID parameters of the system were analyzed. The header behavior model can be used to study the meter readout circuit design, setting PID parameter of the readout circuit and analyze the performance index of the readout circuit and other aspects.