التفاصيل البيبلوغرافية
| العنوان: |
Near-optimal feedback control for postprandial glucose regulation in type 1 diabetes. |
| المؤلفون: |
Sanz, R., García, P., Romero-Vivó, S., Díez, J.L., Bondia, J. |
| المصدر: |
ISA Transactions; Feb2023, Vol. 133, p345-352, 8p |
| مصطلحات موضوعية: |
TYPE 1 diabetes, BLOOD sugar, HYPERGLYCEMIA, INTERNAL auditing, GLUCOSE |
| مصطلحات جغرافية: |
PADUA (Italy) |
| مستخلص: |
This paper is focused on feedback control of postprandial glucose levels for patients with type 1 Diabetes Mellitus. There are two important limitations that make this a challenging problem. First, the slow subcutaneous insulin pharmacokinetics that introduces a significant lag into the control loop. Second, the positivity constraint on the control action, meaning that it is not possible to remove insulin from the body. In this paper, both issues are explicitly considered in the design process using the internal model control framework, to derive a near-optimal feedback controller. Optimality is understood here as minimizing the blood glucose peak after a meal intake and, at the same time, preventing glucose values below a prescribed threshold. It is shown how the proposed controller approaches the optimal closed-loop performance as a limit case. The theoretical results are supported by a numerical example and the feasibility of the overall strategy under uncertainties is illustrated using an extended version UVa/Padova metabolic simulator. • Blood glucose control after a meal in patients with type 1 diabetes is investigated. • Unannounced control, that is, without intervention of the patient, is pursued • A controller is derived by means of the internal control model framework. • The positive control action constraint is taken into account at the design stage. • Optimal closed-loop control policy is approached as a tuning parameter tends to zero. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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