基于反馈调节器的应变式位移传感器非线性校正  

Nonlinear Compensation of the Strain-Type Displacement Sensor Based on Feedback Regulator

作　　者：景婧[1] 卢文科[1] 左锋[1] 石红瑞[1] 

机构地区：[1]东华大学信息科学与技术学院,上海201620

出　　处：《东华大学学报（自然科学版）》2013年第3期349-355,共7页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(60976058)

摘　　要：因受自身材质、工艺等条件的限制以及温度等外界环境影响,应变式位移传感器的输入-输出特性存在非线性误差.采用最小二乘法建立传感器正模型、逆模型及传统方法补偿后的传感器输出误差模型.在此基础上根据反馈控制理论引入反馈调节器,利用传感器正模型与输出误差模型对系统非线性特性做进一步补偿,实现对传统非线性校正方法的改进.同时,通过调节反馈系数改变反馈调节器的作用强度,可抑制系统零点漂移.研究结果表明,经含有反馈调节器的非线性校正环节作用后。Because of the internal and external factors, the relationship between the input and output of the sensor presents nonlinearity. The least-square method was applied to establish the sensor positive model, contrary model and output error model after traditional compensation. Based on the feedback control theory, feedback regulator was employed to the system, which used the sensor positive model and the output error to compensate further for the nonlinearity. Adjusting the magnitude of feedback parameter can change the effect intensity of the regulator. The research results show that the functional relationship can implement the nonlinear compensation of the sensor and eliminate zero drift.

关 键 词：应变式位移传感器 非线性校正 最小二乘法 反馈调节器 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]