基于PSO-BP温度补偿算法的智能压力传感器设计  

Design of Intelligent Pressure Sensor Based on PSO-BP Temperature Compensation Algorithm

作　　者：张凌峰 丁晓宇 潘慕绚[1] ZHANG Lingfeng;DING Xiaoyu;PAN Muxuan(College of Energy and Power Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《南京航空航天大学学报(自然科学版)》2025年第1期160-168,共9页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：压力信号是表征航空发动机工作性能的重要物理量。本文针对压力信号的高精度测量需求,提出了一种基于PSO-BP温度补偿算法的智能压力传感器设计方案。选取微电子机械系统(Micro-electro-mechanical system,MEMS)压阻式传感器作为信号感知端,通过模块化思想设计智能压力传感器的硬件和软件构架。针对压力传感器敏感元件因温度漂移造成的精度偏差问题,提出了一种基于PSO-BP神经网络的嵌入式温度补偿算法以提升测量精度。集成智能传感器软硬件功能,为验证智能传感器在全工况范围内的精度,进行多种压力、温度下的压力测量实验。结果表明,本文设计的智能压力传感器经补偿后满量程误差最大值为0.44%(量程范围为0~4 MPa),相比于传统插值法、多项式拟合法等温度补偿算法,精度提升至少20%,且算法单次仅耗时2μs,具有工程应用价值。Pressure is an important physical signal that characterizes the operating performance of aero-engine.A design based on PSO-BP temperature compensation algorithm for intelligent pressure sensor is proposed for the high-precision measurement requirement of pressure signal.Micro‑electro‑mechanical system(MEMS)piezoresistive sensor is selected as the sensing module,and the hardware and software architecture of the intelligent pressure sensor is designed through modularization scheme.An embedded temperature compensation algorithm based on PSO-BP neural network is proposed to enhance the measurement accuracy in response to the problem of accuracy deviation of pressure sensor element due to temperature drift.The integration of hardware and software functions of intelligent sensor are carried out,and the pressure measurement experiments under different pressure and temperature conditions are conducted in order to verify the accuracy of intelligent sensor in the full range of operating conditions.The results show that the maximum full-scale error of the intelligent pressure sensor designed is 0.44%(Measurement range 0—4 MPa)after compensation,which improves the accuracy by at least 20%compared with temperature compensation algorithms such as the traditional interpolation method and polynomial fitting method,and the temperature compensation algorithm only takes 2μs for a single time,which is valuable for engineering application.

关 键 词：航空发动机 MEMS压阻式智能压力传感器 模数转换驱动 温度补偿 PSO-BP神经网络 

分 类 号：V233.7[航空宇航科学与技术—航空宇航推进理论与工程]