نوع مقاله : گرایش دینامیک، ارتعاشات و کنترل
نویسندگان
1 دانشجوی کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه صنعتی سهند، تبریز، ایران
2 استادیار، دانشکده مهندسی مکانیک، دانشگاه صنعتی سهند، تبریز، ایران
3 استاد، دانشکده مهندسی مکانیک، دانشگاه صنعتی سهند، تبریز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [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]
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