Aktivno prigušenje vibracija kod nosivih konstrukcija korištenjem piezoelektričnih elemenata

master's thesis

• Title (english): Active vibration control in structures using piezoelectric elements
• Author: Antonia Penđer
• Mentor: Andrej Jokić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2017-07-20, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Zbog nepoželjnog utjecaja vibracija na konstrukcije često se javlja potreba za njihovim prigušivanjem. Aktivno prigušenje podrazumjeva postojanje senzora i aktuatora koji u realnom vremenu mjere odziv i dinamički djeluju na konstrukciju. U zadnje vrijeme, sve je češća upotreba piezoelektričnih materijala u te svrhe.

U radu je razrađen model grede na kojoj su raspoređeni piezoelementi. Koristeći metodu konačnih elemenata i osnovne jednadžbe piezoelektirčnih materijala, stvoren je model prikladan za sintezu regulatora namjenjenog minimizaciji utjecaja poremećaja na progibe/zakret grede. Za sintezu se koristi Hinf teorija optimalnog upravljanja koja omogućava oblikovanje željenog odziva sustava u frekvencijskom području upotrebom filtera.

Abstract (english)

Due to the undesirable impact of vibration on the structures in many applications there is a need for introducing appropriate vibration damping. Active damping

implies existence of sensors and actuators that in real-time measure response and dynamically affect the structure. Since recently the piezoelectric materials are increasingly used for these purposes.

In this work, a dynamical model of an elastic beam with piezoelectric sensors/actuators has been developed. Using the finite element method and the basic equations of the piezoelectric materials the model has been further adapted and made suitable for control synthesis purposes. The considered control goal was to minimize the impact of the external disturbances on beam displacements. For this purpose Hinf optimal control theory has been used.

• Keywords: Vibracije; Nosive konstrukcije; Optimalno upravljanje; Piezoelektrični senzori/aktuatori; Metoda konačnih elemenata
• Keywords (english): Vibrations; Bearing structures; Optimal control; Piezoelectric sensors/actuators; Finite element method
• Language: croatian
• URN:NBN: urn:nbn:hr:235:251091
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-22 19:38:44