| The high-precision simulated lung system is essential for respiratory machine performance testing and the training of respiratory therapists.It is not only an important tool for clinical medical education,training,and scientific research,but also helps to avoid the dangers of clinical trials.It can be used for respiratory machine design verification,factory testing,periodic inspections and calibration during use.Therefore,in the current practice of comprehensive respiratory machine performance testing,it is of great significance to develop a cost-effective,portable,and accurately controllable active simulation lung system that can precisely simulate human respiration processes.This paper takes the active simulated lung system as the research object and controls the respiratory airway through a proportional valve.The hardware and software of the simulated lung system are designed and the experimental platform is verified.The main research contents of this paper are as follows:(1)Currently,active simulated lungs primarily simulate human respiratory processes through the reciprocating motion of piston cylinders,which has a complex structure,cumbersome operation,and low testing accuracy.To address these issues,this paper designs and develops a hardware system based on proportional valves and simplifies the structure of the active simulated lung system through software control algorithms to improve the equipment’s flexibility,practicality,and adjustment accuracy and meet the testing,debugging,and training needs of ventilators.(2)Currently,the data volume of the respiratory curve model library of simulated lung systems is small,and it cannot meet the needs of simulating the physiological characteristics of different patients’ respiratory systems.To address this issue,this paper constructs a respiratory system respiratory curve library and designs a flow data enhancement method based on CGAN algorithm,which effectively expands the data volume of the respiratory system curve model library to meet the needs of different operating modes of the active simulated lung sy stem.(3)To adaptively control the active simulated lung system’s control and regulation process,this paper adopts a fuzzy adaptive PID control algorithm,fully leveraging the advantages of the fuzzy PID control strategy,and realizing real-time monitoring and adaptive control of the active simulated lung system’s working conditions to improve the control accuracy and stability of the active simulated lung system and effectively simulate human respiratory processes.Finally,based on the software and hardware system researched in this paper,an active simulated lung experimental platform is constructed and software and hardware debugging is conducted.By analyzing the experimental results of the flow curve tracking obtained,the feasibility of the constructed active simulated lung experimental platform is verified.The active simulated lung system designed in this paper has the advantages of simple mechanical structure,low cost,and high flexibility,and can provide a relatively comprehensive testing platform for ventilators.It can also provide respiratory machine performance testing and evaluation,training,and demonstration for relevant medical staff according to different medical conditions and needs,and provide strong support for the research and development of the respiratory therapy medical field. |
