动力调谐陀螺仪角度传感器的设计

ABSTRACTAs one important unit of gyro,the angle transducer can be sensitive to the anglerotation of gyrorotor,and output the measurable electric signal.To date,sensortechnology has been well developed,but due to the structural feature of dynamicallytuned gyro(DTG),variable-air-gap inductance transducer is still one reasonablechoice.And with the predominance of simple structure,low environmentrequirements,good stability,high resolution,low output resistance and great outputpower,this angle sensor is widely used in DTG..Firstly,this paper makes one comparison of different inductance transducers,andbrings forward the selection principle of inductance transducer for gyro,on the basisof the structural feature of DTG..And then we make an analysis of the variable-air-gapinductance transducer,and describe the structural characteristic,measuring circuit anderror performance of the special DTG transducer.Secondly,according to the criteria for system design,we analyze the designproposal of the mechanism and electromagnetism in detail,and make a discussion ofthe signal measuring circuit of transducer.And simulation studies are made for themagnetic-field distribution of angle transducer with the help of ANSYS,and then wecan gain the figure of the magnetic flux density distribution,and intuitionallyunderstand the magnetic flux density distribution of the gap and edge.Meanwhile,according to the design scheme and production process,we manufacture the relevantcomponent and accomplish the assembly work.And then we carefully adjust the zeroposition of angle transducer,and calibrate the scale factor by means of calibrationexperimentation.Finally,after accomplishing the assembly work of the overall DTG,we make adrift test on the DTG via the data acquisition card and uniaxial precision rotatingplatform.And the results of the measurement show our design proposal is reasonableand meets the criteria for system design of DTG.KEY WORDS:inductance transducer,dynamically tuned gyro,inductance coil,magnetic circuit,FEM,drift test