مکانیک هوافضا

مکانیک هوافضا

تخمین زمان-ثابت عدم قطعیت‌ها و ورودی جاده در سیستم تعلیق خودرو: یک رویکرد عملی

نوع مقاله : گرایش دینامیک، ارتعاشات و کنترل

نویسندگان
1 دانشجوی کارشناسی ارشد، دانشگاه صنعتی سهند، تبریز، ایران
2 استادیار، دانشگاه صنعتی سهند، تبریز، ایران
3 استاد، دانشگاه صنعتی سهند، تبریز، ایران
چکیده
این پژوهش به طراحی و پیاده‌سازی عملی یک رویت‌گر حالت توسعه‌یافته زمان-ثابت برای تخمین هم‌زمان عدم‌قطعیت‌های مدل و ورودی جاده در سیستم تعلیق خودرو می‌پردازد. با بازنویسی معادلات دینامیکی سیستم در فرم فضای حالت و در نظرگیری عدم‌قطعیت‌ها به‌عنوان متغیرهای حالت توسعه‌یافته، رویت‌گر پیشنهادی با تکیه بر تئوری پایداری لیاپانوف و تعیین تحلیلی پارامترهای آن طراحی شده است. نوآوری اصلی این کار، تضمین همگرایی در یک بازه زمانی ثابت و مستقل از شرایط اولیه است. عملکرد رویت‌گر پیشنهادی بر روی یک دستگاه آزمایشگاهی مدل یک‌چهارم سیستم تعلیق خودرو (مک‌فرسون) مورد ارزیابی تحلیلی و تجربی قرار گرفت. نتایج تجربی نشان می‌دهد که رویت‌گر پیشنهادی قادر به تخمین مستقل از شرایط اولیه و پایدار حالت‌های سیستم و ورودی جاده است. همچنین، مقایسه نتایج رویت‌گر پیشنهادی با رویت‌گر حالت توسعه‌یافته مرسوم، برتری واضح روش پیشنهادی را از نظر دقت تخمین تأیید می‌کند. این یافته‌ها کارایی و قابلیت اطمینان روش ارائه‌شده را در شرایط عملی به‌وضوح نشان می‌دهند

چکیده تصویری

تخمین زمان-ثابت عدم قطعیت‌ها و ورودی جاده در سیستم تعلیق خودرو: یک رویکرد عملی
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Fixed-Time Estimation of Uncertainties and Road Excitation in Vehicle Suspension System: A Practical Approach

نویسندگان English

Ahmad Sabet Ghadam Alvar 1
Sadra Rafatnia 2
mehdi mirzaei 3
1 Master's student, Sahand University of Technology, Tabriz, Iran
2 Assistant Professor, Sahand University of Technology, Tabriz, Iran
3 Professor, Sahand University of Technology, Tabriz, Iran
چکیده English

This study presents the detailed design and practical implementation of a fixed-time extended state observer for the precise simultaneous estimation of model uncertainties and road excitation input in a vehicle suspension system. By reformulating the system dynamics in state-space form and treating uncertainties and external disturbances as extended states, the proposed observer is analytically derived using Lyapunov stability theory. The key innovation lies in guaranteeing convergence within a fixed time interval, independent of initial conditions. The performance of the proposed observer is evaluated both analytically and experimentally using a quarter-car suspension test setup (MacPherson). Experimental results demonstrate that the observer achieves stable and initial-condition-independent estimation of both system states and road input. Furthermore, a comparison with a conventional extended state observer confirms the clear superiority of the proposed method in terms of estimation accuracy. These comprehensive findings collectively underscore the effectiveness and reliability of the presented approach in practical scenarios

کلیدواژه‌ها English

vehicle Suspension System Unknown Road Input Fixed
Time Extended State Observer Extended State Observer


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دوره 21، شماره 4 - شماره پیاپی 82
زمستان
زمستان 1404
صفحه 37-52

  • تاریخ دریافت 31 شهریور 1404
  • تاریخ بازنگری 02 آذر 1404
  • تاریخ پذیرش 19 آذر 1404
  • تاریخ انتشار 01 بهمن 1404