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کنترل مود لغزشی اندازه قطرات در یک میکروکانال با تنظیم دبی پمپ تزریق: بررسی تجربی | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 2، دوره 54، شماره 10، دی 1401، صفحه 2239-2254 اصل مقاله (2.81 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2022.20666.7290 | ||
| نویسندگان | ||
| علی اصغر مهدی زاده سولا؛ مصطفی نظری* ؛ حبیب احمدی؛ محسن نظری | ||
| دانشکده مهندسی مکانیک و مکاترونیک، دانشگاه صنعتی شاهرود، شاهرود، ایران | ||
| چکیده | ||
| امروزه در زمینه تولید میکروقطرات تحقیقات زیادی صورت‌گرفته است، اما تعداد محدودی از آن‌ها به کنترل فعال اندازه قطره و تغییر آن به‌صورت برخط پرداخته‌اند. در این تحقیق، ابتدا یک میکروکانال با هندسه جریان متمرکز شونده با استفاده از روش فوتولیتوگرافی ساخته شده است. جهت تزریق سیالات در درون کانال، یک پمپ تزریق با استفاده از یک موتور جریان مستقیم با دور و گشتاور مناسب و ماژول طراحی و ساخته شده است. سیالات مورد استفاده در این تحقیق، آب دو بار تقطیر به عنوان فاز گسسته و روغن به عنوان فاز پیوسته است. همچنین برای کنترل خودکار این سیستم، یک بورد آردوینو مگا 2560 به‌عنوان سیستم پردازنده استفاده شده است. قطر قطرات به کمک یک میکروسکوپ دیجیتال سرعت بالا و پردازش تصویر آن با یک روش پر سرعت محاسبه می‌‌شود. برای کنترل اندازه قطرات از دوحلقه کنترلی استفاده شده است؛ در حلقه داخلی جهت غلبه بر نامعینی‌ها از روش کنترل مود لغزشی، و در حلقه خارجی از کنترلکننده تناسبی-انتگرالگیر-مشتق‌گیر استفاده شده است. نتایج به‌دست‌آمده برای سه قطر متفاوت 82، 90 و 100 میکرومتر نشان دهنده عملکرد مناسب کنترلکننده طراحی شده است. عملکرد سیستم مدار بسته در هر حالت با ترسیم نمودار هیستوگرام ارزیابی شده است. | ||
| کلیدواژه‌ها | ||
| میکروسیال‌ها؛ میکروقطرات؛ پمپ تزریق؛ کنترل سایز قطرات؛ کنترلکننده مود لغزشی | ||
| عنوان مقاله [English] | ||
| Sliding Mode Control of Droplet Size in a Microchannel by Adjusting Syringe-Pump Flow: Experimental Study | ||
| نویسندگان [English] | ||
| Ali Asghar Mahdizadeh soula؛ Mostafa Nazari؛ Habib Ahmadi؛ Mohsen Nazari | ||
| Shahrood University of Technology | ||
| چکیده [English] | ||
| Microfluidics has many applications in modern sciences such as medicine and biomedical engineering. There are usually two ways of injecting fluids; using pressure regulations in fluid flow lines and using syringe pumps, which using syringe pumps is the most common way. Today, a lot of research has been done in this field, but a limited number of them have focused on active control of the droplet size. In this research, a microchannel was first fabricated using photolithography. To inject fluids into the channels, a syringe pump is designed and built using a DC motor with suitable speed and torque and the L298N module. The fluids used in this research are double distilled water as a discrete phase and oil as a continuous phase. An Arduino Mega 2560 board has also been used as the processor to automatically control this system. The droplet diameter is calculated using a digital microscope and its image processing with a high-speed algorithm. The sliding mode control algorithm has been used to control the droplet size due to the nonlinearity of the system behavior as well as the disturbances. The obtained results for three different diameters i.e. 82, 90, and 100 µm, show the accurate performance of the sliding mode controller. | ||
| کلیدواژه‌ها [English] | ||
| Microfluidics, Micro-droplets, Syringe pump, Droplet size control, Sliding mode control | ||
| مراجع | ||
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