20.500.12556/RUL-172007 Razvoj, izdelava in testiranje protitipa piezo aktuatorskega sistema za uporabo v hidravličnem sedežnem ventilu Development, manufacturing and testing of piezo actuator system used for hydraulic seat valve Natančno krmiljenje je ključnega pomena v sodobnih hidravličnih sistemih, kjer se zahtevajo visoka ponovljivost, hitrost in zanesljivost. Dandanes to dosegamo predvsem z uporabo visoko-dinamičnih proporcionalnih ali servo ventilov, ki predstavljajo kompaktno, a zapleteno in drago komponento. Raziskave so pokazale visok potencial piezo aktuatorjev pri vgradnji v hidravlične ventile, saj imajo izjemno hiter odzivni čas, delujejo na mikrometrskem nivoju in so zelo energetsko učinkoviti. Zaključna naloga se osredotoča na razvoj in izdelavo piezo aktuatorskega sistema, ki ga bomo lahko uporabili za konvencionalni sedežni ventil in bi nadomestil elektromagnetne aktuatorje. Delo obsega predstavitev teoretičnega ozadja, izbiro piezo aktuatorjev in definiranje ustreznih sedežnih ventilov. Izdelana je zasnova vgradnje piezo aktuatorja v ohišje, njegovo prednapetje in vodenje ter pripravimo 3D model prototipa ter izdelamo sestavne dele. Dodatno izdelamo preizkuševališče in naredimo načrt eksperimentov. Preverimo delovanje krmilne elektronike in piezo aktuatorskega sistema, kjer testiramo predvsem statične lastnosti, to je raztezek piezo aktuatorskega sistema pri različnih krmilnih napetostih. Na koncu ovrednotimo linearnost pomika in histerezo. Vsa programska koda za generacijo signalov je bila napisana v programskem jeziku Python, vse meritve pa so bile izvedene z merilno opremo podjetja Paternoster d.o.o. Precise control is a key requirement in modern hydraulic systems, where high repeatability, fast response, and reliability are essential. These characteristics are currently achieved primarily through the use of high-dynamic proportional or servo valves, which represent compact but complex and costly components. Research has demonstrated the high potential of piezo actuators for integration into hydraulic valves due to their extremely fast response times, micrometer-level precision, and high energy efficiency. The thesis focuses on the development and construction of a piezo actuator system that can be applied to a conventional seat valve and serve as a replacement for electromagnetic actuators. The work includes the presentation of the theoretical background, the selection of piezo actuators, and the definition of suitable seat valves. We design the integration of the piezo actuator into the housing, its preloading and control, and prepare a 3D model of the prototype as well as manufacture its components. In addition, we develop a test rig and plan the experiments. The functionality of the control electronics and the piezo actuator system is verified, with an emphasis on static characteristics, namely the displacement of the piezo actuator system at different control voltages. Finally, the linearity of the displacement and the hysteresis are evaluated. All signal generation code was written in the Python programming language, and all measurements were carried out using measuring equipment provided by company Paternoster d.o.o. hidravlika piezo aktuator piezoelektričnost sedežni ventil histereza krmiljenje hydraulics piezo actuator piezoelectricity seat valve hysteresis control true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-09-05 08:30:25 2025-09-05 08:30:31 2025-09-30 03:59:47 0000-00-00 00:00:00 2025 0 0 XII, 33 f. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 537.226.86:621.22(043.2) 275495 248232451 43528.pdf 43528.pdf 1 1330CE5BDBF7DF0D9ABAB7EA11F79936 bca72c2e8bfa49df3e921a6fa5f668cd1a08597688dd7f6acce1dfb48711bdc6 ac4c98a9-8a21-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=215725 Fakulteta za strojništvo 0 0 0