某型飞机驾驶杆线性位移差分变压器传感器信号调理校正

LVDT Sensor Signal Conditioning and Calibration Method for a Certain Type Airplane Control Stick

摘要:

飞机驾驶杆LVDT(线性位移差分变压器)传感器信号测试校正在航空测控研究领域具有十分重要的意义,提出了一种针对某型飞机驾驶杆LVDT传感器信号精确调理校正方法;介绍了飞机驾驶杆LVDT传感器原理,分析了AD598 LVDT调理芯片的使用局限,利用最小二乘法设计了精确调理校正方法；基于VC++2010开发环境,利用高精度的模拟校正源产生模拟激励校正信号,设计了驾驶杆LVDT多通道软件自校正方法,它可以有效提高解调电路的线性度和对称性,克服了AD598常规调理电路的使用局限,从而实现驾驶杆LVDT信号精确检测；理论分析与数值试验验证了所提方法的正确性和有效性。

Abstract:

This paper proposed a LVDT (Linear Variable Differential Transformer) signal conditioning and calibration method for a certain type fighter airplane control stick. Aimed at the airplane control stick LVDT signals, a conditioning and calibration method based on least squares method was founded via introducing the principles of LVDT sensor, and via analyzing the principles and limitation of AD598；a software self-calibration method which calibrate the multichannel LVDT signals was designed based on VC++ 2010, linearity and symmetry of signal conditioning circuit was improved effectively,and then detection precision of system was improved too. Theoretical analysis and experiment results show that the proposed method is effective for stick LVDT signal conditioning and calibration.