| dc.description.abstract | Chronic Obstructive Pulmonary Disease (COPD) is defined as a lung inflammation that
can cause a continuous limitation of airflow. Spirometry is a common examination used in
the evaluation of lung function in COPD patients. However, many patients have to repeat
this examination several times due to their breathing limitations. A characteristic clinical
feature of COPD patients is the appearance of a barrel chest, which indicates the severity
and progression of the disease. Therefore, a system for measuring chest expansion has
been proposed, which consists of a measuring device and an application that synergize to
monitor the progression of COPD in patients. The measuring device in this system uses a
stepper motor for its movement. Stepper motors are widely used in systems that require
position control due to their flexibility, ease of control, and relative efficiency. However,
the low torque-to-current ratio produced by the stepper motor control algorithm affects the
efficiency that can still be improved. Current research on energy-efficient electric motors
focuses on induction machines, which consume a significant amount of energy. Thus, the
efficiency of low-power electric motors such as stepper motors is rarely discussed in the
literature. Therefore, calculating the energy consumption of the stepper motor is an
interesting topic for research. Using a quantitative method, this study aims to analyze the
effect of the speed of the stepper motor on its efficiency. Thus, this system can be improved
to assist in overcoming difficulties in measuring and monitoring the progression of COPD
in patients. | en_US |
