Experimental evaluation of a real‐time kinematic GPS positioning technique

Huang, Guo‐Shing; Tsai, Ching Chih

doi:10.1080/02533839.2007.9671306

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…This section studies the way to establish a mathematical model for the built open-loop OSA treatment system, and a least-squares method (Yeh andHuang 2008, Huang andTsai 2007) to estimate these system parameters. The mathematical model Notice that the experimental condition to successfully estimate these system parameters is that the system has a persistently exciting input signal and has no external disturbance from patient's breath.…”

Section: Mathematical Modelingmentioning

confidence: 99%

Two degree‐of‐freedom control for constant continuous positive airway pressure of an obstructive sleep apnea treatment system

Tsai¹,

Wang

et al. 2008

Journal of the Chinese Institute of Engineers

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This paper presents a two degree-of-freedom control method for achieving constant continuous positive airway pressure (CPAP) of an obstructive sleep apnea (OSA) treatment system. After constructing a closed-loop DC brushless motor drive together with a blower and an airway module, we develop a pressure control system for achieving CPAP control. A mathematical model of the overall open-loop system is established based on the input-output data and its system parameters are sequentially determined using the recursive least-squares (RLS) method. A two degree-of-freedom (DOF) controller, including a feedforward controller and a feedback proportional-integral controller, is proposed to maintain and follow the desired pressure setpoints. Through experimental results, the proposed control method is shown useful and effective in achieving airway pressure tracking and regulation.

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Section: Mathematical Modelingmentioning

confidence: 99%