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The Hybrid Closed-Loop System Tandem t:slim X2™ with Control-IQ Technology: Expert Recommendations for Better

Ana Chico1,2,3, Jesús Moreno-Fernández4, Diego Fernández-García5,6,7,8

  • 1Department of Endocrinology and Nutrition, Hospital Santa Creu i Sant Pau, Av. Pare Claret 167, 08025, Barcelona, Spain. achicob@santpau.cat.

Diabetes Therapy : Research, Treatment and Education of Diabetes and Related Disorders
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Keywords:
Artificial pancreasAutomated insulin deliveryContinuous glucose monitoringControl-IQ technologyHybrid closed-loop systemInsulin pumpMultiple daily injectionsTime in rangeType 1 diabetes

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Open and closed-loop control systems01:17

Open and closed-loop control systems

Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
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Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
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Controller configurations are crucial in a car's cruise control system because they manage speed over time to maintain a consistent pace regardless of road conditions, thereby meeting design goals. In traditional control systems, fixed-configuration design involves predetermined controller placement. System performance modifications are known as compensation.
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In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
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