在1型糖尿病患者中以观察者为基础的血葡萄糖调节控制,患者的输入延迟未知
Boubekeur Targui1, Jose-Fernando Castro-Gomez2, Omar Hernández-González2
1Laboratoire d'Ingénierie des Systèmes (LIS), Université de Caen Normandie, Caen, France.
概括
这项研究提出了1型糖尿病的新控制策略,通过控制葡萄糖水平,改善人工胰腺功能,尽管有延迟和饮食干扰. 该系统旨在实现天然的葡萄糖反应,增强患者的安全性和血糖控制.
科学领域:
- 生物医学工程 生物医学工程
- 控制系统理论 控制系统理论
- 内分泌学 在内分泌学.
背景情况:
- 1型糖尿病 (T1DM) 的管理需要精确的葡萄糖调节.
- 人工胰腺系统面临着时间延迟和饮食干扰等不可预测因素的挑战.
- 现有的控制策略可能无法完全解决现实的生理变异.
研究的目的:
- 在T1DM患者中开发基于观察者的血葡萄糖调节控制策略.
- 通过计算未知的时间变化的延迟和食干扰来提高人工胰腺的性能.
- 设计一个模仿自然胰腺动态反应的控制系统.
主要方法:
- 使用了一个扩展的伯格曼最小模型,一个非线性葡萄糖-胰岛素模型.
- 设计了一个基于观察者的状态反控制器来处理未知的长时间延迟.
- 基于Lyapunov条件用于增益计算和稳定性保证的使用线性矩阵不等式 (LMIs).
主要成果:
- 建议的控制策略有效调节血葡萄糖水平.
- 该系统证明了对未知的饮食干扰和时间变化的延迟的稳定性.
- 数字模拟证实避免了低血糖事件,并实现了稳定的血糖控制.
结论:
- 基于观察者的控制策略为先进的人工胰腺系统提供了一个有希望的方法.
- 这种方法通过解决现实的系统不确定性来增强T1DM中的葡萄糖调节.
- 设计的控制器提供了柔软的,自然的动态反应,改善了患者的治疗结果和安全.
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