【摘要】 为配合呼吸机测试、临床人员培训和呼吸诊疗设备研发等工作，设计了一套主动模拟肺设备。介绍了该主动模拟肺设备的系统设计方案，使用电气比例阀作为执行部件，通过增量PI和模糊PID控制算法，调节每条支气路气体流量，实现对呼吸特征和气体组分的精确控制。对人体正常呼吸和麻醉呼吸模式下的呼吸动作进行模拟，流量曲线的跟随性较好，均方根误差在可接受阈值内，其潮气量、峰值流量等呼吸特征均达到要求；同时，该模拟肺对于气体组分的控制能够满足对血氧交换过程的模拟需求，代替人体完成面向不同类型呼吸疾病和不同病程的呼吸诊疗设备校验和调整。更多还原

【Abstract】 This study proposes an active lung simulator aimed at supporting ventilator testing, clinical personnel training, and the development of respiratory diagnostic and therapeutic devices. The system utilizes an electrical proportional valve as its actuator, with incremental PI and fuzzy PID control algorithms employed to regulate gas flow in each branch, achieving precise control of both respiratory features and gas composition. Experimental simulations of normal human breathing and anesthetic breathing patterns demonstrate that the active lung simulator achieves excellent flow curve tracking performance, with root mean square errors within acceptable thresholds. Key respiratory parameters, including tidal volume and peak flow rate, meet the required standards. Furthermore, the simulator effectively controls gas composition to mimic the blood gas exchange process, providing a reliable alternative for calibrating and adjusting respiratory therapeutic equipment for various respiratory diseases and stages of disease progression.更多还原