主被动一体式模拟肺设计与测试  

Design and Testing of Active-Passive Integrated Lung Simulator

作　　者：任帅 赵蓉恒 王蕴琦 蔡茂林[2] 石岩[2] 王涛[1] REN Shuai;ZHAO Rongheng;WANG Yunqi;CAI Maolin;SHI Yan;WANG Tao(School of Automation,Beijing Institute of Technology,Beijing 100081,China;School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京理工大学自动化学院,北京100081 [2]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《北京理工大学学报》2024年第10期1089-1094,共6页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(52005015);北京市自然科学基金资助项目(3232014);北京理工大学青年教师学术启动计划资助项目(202207001)。

摘　　要：人工模拟肺是呼吸机设计开发和性能测试不可或缺的关键仪器设备.当前国内外模拟肺多数为被动模式,即仅能模拟人体无自主呼吸意识下的被动呼吸功能,且呼吸力学参数固定.针对以上问题,设计了一种呼吸力学参数连续可调的主被动一体式人工模拟肺模型.首先,设计并加工了人工模拟肺的外形结构,开发了基于步进电机的模拟肺驱动系统.其次,设计了基于LabVIEW的上位机控制软件,实现对步进电机的驱动控制和压力、流量信号的反馈处理.最后,搭建整体实验平台,实现了主动呼吸模式下快速呼吸、平静呼吸、深度呼吸这三种人体基本呼吸模式的模拟,测量潮气量与目标潮气量误差在±0.05%以内;设计了基于PID控制的模拟肺顺应性控制方法,实现了被动呼吸模式下不同顺应性时的跟随控制,维持目标顺应性误差在±15%以内.Artificial lung simulator is an indispensable key instrument for ventilators'design,development and performance testing.Currently,most lung simulators are passive models at home and abroad,simulating only the passive respiratory function of the human body without autonomous respiratory consciousness and with fixed respiratory mechanical parameters.To solve the above problems,an integrated active-passive lung simulator with continuously adjustable respiratory mechanical parameter was designed in this paper.Firstly,the shape structure of the artificial lung simulator was designed and processed,and the lung simulator driving system based on a stepping motor was developed.Secondly,a LabVIEW-based upper computer control software was designed for the drive control of the stepper motor and the feedback processing of the pressure and flow signals.Finally,an overall experimental platform was built to simulate three basic human breathing modes,namely,fast breathing,calm breathing,and deep breathing for active breathing mode,showing the error within 0.05%between the measured tidal volume and the target tidal volume.And then,a lung simulator compliance control method was designed based on the PID control to achieve the following control under different compliance of passive breathing mode and maintaining the error of target compliance within 15%.

关 键 词：人工模拟肺 呼吸机 肺顺应性 PID控制 

分 类 号：TH772[机械工程—仪器科学与技术]