معرفی مبدل چند خروجی SIMO و طراحی کنترل‌کنندة چندمتغیره به‌منظور به‌کارگیری در واحد ناوبری اینرسی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری / مجتمع دانشگاهی برق و الکترونیک، دانشگاه صنعتی مالک اشتر، تهران

2 عضو هیات علمی / مجتمع دانشگاهی برق و الکترونیک، دانشگاه صنعتی مالک اشتر

چکیده

منبع تغذیه­ای که بتواند با داشتن ابعادی کوچک چندین ولتاژ DC ایجاد کند، گزینه­ای مناسب جهت تأمین توان در یک واحد ناوبری اینرسی است. یک نمونة مناسب برای این دسته از مبدل‌ها، مبدل تک القاگر چند خروجی می­باشد. مبدل­های SIMO توان لازم برای بهره‌برداری در مواردی که نیاز به چند سطح ولتاژی خروجی قابل کنترل است فراهم می‌آورند. در این مقاله، کنترل چندمتغیرة یک مبدل از خانوادة SIMO مبتنی بر مدل فلوگرف سیگنال بررسی شده ­است. این مقاله به بررسی ساختار باک / باک یک مبدل سوئیچینگ SIMO پرداخته تا با طراحی کنترل­کنندة مناسب مشکل رایج تنظیم متقابل خروجی­های آن را حل کند. مدل‌کردن این نوع از مبدل­ها جهت طراحی کنترل­کننده به‌دلیل نحوة عملکرد و تعداد زیاد المان­ها و خروجی­ها از پیچیدگی خاصی برخوردار است. از طرفی طراحی کنترل‌­کننده­ای که بتواند خروجی­ها را به‌صورت مستقل کنترل کند، مستلزم داشتن مدل دقیق از رفتار این نوع از مبدل­هاست. در این مقاله ساختار باک / باک با استفاده از روش فلوگراف سیگنال مدل شده و مقایسه­ای مابین روش ارائه‌شده با روش میانگین فضای حالت ارئه شده ­است. سپس با استفاده از کنترل سیستم­های چندمتغیره، کنترل­کنندة مناسب جهت حذف مشکل تنظیم متقابل طراحی شده و نتایج شبیه‌سازی آن ارائه شده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Multivariable controller design of a SIMO converter in order to implement in inertial measurement unit

نویسندگان [English]

  • Majid Abbasi 1
  • Ahmad Afifi 2
  • Mohammad Reza Alizadeh Pahlavani 2
1 Ph.D student, Faculty of Electrical Engineering, Malek Ashtar University of Technology
2 Associate Professor, Faculty of Electrical Engineering, Malek Ashtar University of Technology
چکیده [English]

A small switching DC-DC power supply which provides different output level is a good alternative in navigation systems. Single inductor multi output (SIMO) converters can be good for existing parallel output configurations in these applications. In this paper, a multivariable control based on signal flow graph modelling is used to reduce the cross regulation problem of a step down single inductor multi output converter. The multi-stages operation of SIMO converters cause, to achieve the model which predicts their all behaviors, be more difficult than typical converters. By SFG method, all small-signal transfer functions can be derived. In the other hand, designing a controller to control each output independently needs an accurate model to predict all behavior of the converter. In this paper a buck/buck SIMO converter is modeled by SFG. An effort has been made to compare modelling results between SFG and state-space averaging method in a buck/buck structure. Then, a multivariable controller scheme based on SFG model is designed to eliminating the cross regulation of the outputs. Simulation results are included to show the validity of the obtained model and designed controller.

کلیدواژه‌ها [English]

  • spacecraft power system
  • SIMO converter
  • multivariable control
  • duty cycle
  • small-signal model

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