脉宽双加矩型加速度传感器技术研究

发布时间：2018-01-06 04:30

本文关键词：脉宽双加矩型加速度传感器技术研究　出处：《浙江大学》2017年硕士论文　论文类型：学位论文

【摘要】：加速度传感器可以测量加速度、震动、倾斜等物理量,广泛地应用于航空航天、惯性制导、倾斜测井等领域之中。石英挠性加速度传感器是现阶段广泛使用的一款加速度传感器。石英挠性加速度传感器脉冲加矩再平衡回路具有抗干扰能力强、稳定好等优点,是加速度传感器数字化的一种重要方案,但是该方案存在测量分辨率不足的问题。本课题提出了二元调宽脉冲双加矩数字化加速度传感器方案,该方案旨在实现系统的全数字化以及提高系统的测量分辨率。课题的主要研究内容如下:1)设计高稳定性恒流源电路。分析了影响反馈型恒流源系统稳定性的主要因素以及各类误差的相互耦合关系,将各种误差因素进行了系统误差合成,设计了高稳定度的恒流源电路。2)提出新型双路电流信号加矩方案。针对双路电流信号加矩时的通道相互耦合问题,提出了交错加矩方案。使用仿真工具搭建了恒流源双路加矩系统电路模型,对交错加矩方案的合理性进行了验证,同时也验证了交错加矩系统的大量程与高分辨率特性。3)研究双路加矩系统控制策略。分析了二元调宽脉冲双加矩系统的传递函数模型,使用仿真工具搭建了系统模型并验证了 PID控制算法可以实现系统稳定控制。针对双路加矩系统的多路控制问题,提出了单路控制量分离方案,并指出了脉冲宽度的相关量化方案。最后,完成了二元调宽脉冲双加矩数字加速度传感器的工程实验样机,搭建了系统的调试与测试平台,对恒流源系统以及整机控制系统的性能指标进行了评估,完成了设计的目标。
[Abstract]:Acceleration sensor can measure acceleration, vibration, tilt and other physical quantities, widely used in aerospace, inertial guidance. In the field of inclined logging, quartz flexible accelerometer is a widely used accelerometer at present. Quartz flexible accelerometer pulse plus moment rebalance circuit has strong anti-jamming ability. Good stability is an important scheme of acceleration sensor digitization, but there is insufficient measurement resolution in this scheme. In this paper, a dual width modulation pulse double plus moment digital acceleration sensor scheme is proposed. The purpose of this scheme is to realize the full digitization of the system and to improve the measurement resolution of the system. The main research contents of this project are as follows: 1). The high stability constant current source circuit is designed. The main factors affecting the stability of the feedback constant current source system and the coupling relationship between various errors are analyzed. Based on the systematic error synthesis of all kinds of error factors, the constant current source circuit with high stability is designed. A new method of adding moment of double current signal is proposed, and the coupling problem of channel when adding moment of double current signal is discussed. The circuit model of two-channel torque adding system with constant current source is built by using simulation tools, and the rationality of the scheme is verified. At the same time, the control strategy of the double path torque system is studied, and the transfer function model of the dual width modulation pulse double plus moment system is analyzed. The simulation tool is used to build the system model and verify that the PID control algorithm can achieve the stability control of the system. Finally, the engineering experiment prototype of the dual width pulse double moment digital acceleration sensor is completed, and the debugging and testing platform of the system is built. The performance indexes of the constant current source system and the whole machine control system are evaluated and the design goal is fulfilled.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH824.4;TP212

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