基于自抗扰控制的新型医用气动比例控制模块

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中图分类号：TH47；TP211 文献标志码：A

Novel Medical Pneumatic Proportional Control Module Based on Active Disturbance Rejection Control

MING Xiaochuan’，HU Hui 2 ，WANG Tao 1 ，REN Shuai1 （1.School of Automation，Beijing Institute of Technology，Beijing 1OOO81，China; 2.Beijing AerospacePropulsion Institute，Beijing1OoO76，China）

Abstract：To address the shortcomings of complex structure，singlecontrol mode，and long development cycleof existing pneumatic medical equipment，a novel medical pneumatic proportional control module was proposed.The module integrated aproportional valve，diferential pressure sensor，pressure sensor，and micro-controlunit，whichhad the function of volumecontrol ventilationand pressurecontrol ventilation.Inviewof thecharacteristicsthatthepressrecontrol performanceof mechanical ventilation was easilyaffected byrespiratory parameters，leakageandother factors，theactive disturbance rejection control strategy was used to improve thestabilityand robustnessof thesystem.Simulation experimentswereconducted to verifythefeasibilityof theactive disturbancrejectioncontroler，and experimentswerecaried outunder diferent setpoints，lung compliance，airway resistance and respiratory rate to evaluate the module performance. The results show that the new medical pneumatic proportional control modulehas the characteristics ofsmall size，high integrationand modularity.Undertheconditionsofuncertainrespiratory parametersand externaldisturbances，the pressure control and volume flow control of the module are within the ranges of 0 to 10kPa and O to 20o L/min respectively. The response time，overshoot and control accuracy of pressure control are less than 200ms ，5% and±1%，respectively，and the response time，overshoot and control accuracy of flow control are less than 150ms ， 2% and ±2% ，respectively， meeting the requirements of miniaturization，integration and high precision of medical devices.

Keywords：automatic technology；pneumatic proportional control;active disturbancerejection control；mechanical ventilation；pneumatic medical equipment

机械通气是医疗领域中一种通过呼吸机辅助或代替患者自主呼吸的治疗手段，旨在向肺部输送必要的氧气以维持患者生命活动[1]。（剩余10043字）