摘要
为设计出具有良好减振效果的MEMS捷联惯导减振系统,提出一种根据传递函数性质及性能指标要求设计减振系统的方法。首先,根据实际应用环境,完成了对MEMS捷联惯导支架及减振器布置的设计,实现了减振系统解耦设计。接着,进行单方向正弦扫频振动,得到某惯导各惯性器件输出的幅频特性曲线;分析各幅频特性曲线,得到了惯导中各MEMS器件减振目标。最后,拟合了对数坐标下共向加速度计输出的幅频特性曲线,并根据拟合得到的曲线及性能指标要求,完成了减振系统设计。Matlab仿真分析得,减振后惯导输出很好满足了性能指标要求,减小了MEMS陀螺仪输出误差,取得了良好减振效果。仿真结果表明,针对MEMS捷联惯导减振,该方法能在满足性能指标要求的前提下,快速设计出具有良好减振效果的减振系统。
To efficiently design damping system of MEMS Strapdown Inertial Navigation System（SINS） which performs well on vibration attenuation,a method to design vibration damping system of MEMS SINS according to transfer function and performance demand were present.First the design of supporter and the assign of vibration damping devices were finished.Then through sine scanning vibration experiment,the amplitude-frequency characteristic curves of the each inertial device in MEMS SINS were obtained,and the vibration damping goal for each inertial device in MEMS SINS were got through the study these curves.At last the amplitude-frequency characteristic curves of the accelerator that sensitive the vibration direction were simulated under logarithmic coordinates,and the design were finished according to outputs requirement.Simulation through MATLAB indicate,after vibration attenuate,designed system perform well in meeting the requirements for outputs of MEMS SINS,meanwhile it decreased the output deviations of three MEMS gyroscope.Simulation indicate,for the vibration damping problem of MEMS SINS,well performed vibration attenuation system can be quickly designed under the output requirement for MEMS SINS through this way.
出处
《机械强度》
CAS
CSCD
北大核心
2017年第4期797-803,共7页
Journal of Mechanical Strength
基金
中科院第三期创新基金(YYJ-1112)资助~~
关键词
MEMS捷联惯导
减振
扫频振动实验
幅频特性曲线
MEMS Sins
Vibration attenuation
Sine scanning vibration experiment
Amplitude-frequency characteristic
