Projektiranje sustava upravljanja suhom dvostrukom spojkom automatskog mjenjača

Tomić, Anton (2014) Projektiranje sustava upravljanja suhom dvostrukom spojkom automatskog mjenjača. = Control system design for a dry dual clutch of an automatic transmission. Master's thesis (Bologna) , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Deur, Joško.

Text 10_07_2014_Diplomski_rad_Anton_Tomic.pdf Restricted to Repository staff only Jezik dokumenta:English Download (10MB)

Abstract (Croatian)

Primjena suhih dvostrukih spojki s elektromehaničkim aktuatorima omogućuje smanjenje potrošnje goriva i emisija štetnih plinova uz udobnost vožnje koju pružaju klasični automatski mjenjači. Preduvjet za ostvarenje tih performansi je kvalitetno upravljanje izmjenom stupnjeva prijenosa i kvalitetna regulacija brzine klizanja spojke te upravljanje momentom spojke na podređenim razinama. U ovom radu predloženi su i opisani mogući načini regulacije i upravljanja momentom spojke, te su svi implementirani i provjereni na eksperimentalnom postavu spojke. Razmatrana spojka koristi aktuator polužnog tipa, upravljan istosmjernim servomotorom. Aksijalna sila koju razvija aktuator prenosi se preko potisnog ležaja na tanjuraste opruge koje djeluju na potisne ploče spojke. Regulacija momenta spojke ostvarena je regulatorom integralnog tipa, projektiranim prema metodi optimuma dvostrukog odnosa. Regulator pruža projektirane performanse u režimu velikih signala, dok u režimu malih signala kvalitetu regulacije smanjuje izraženo statičko trenje. U svrhu kompenzacije efekata uzrokovanih trenjem, predložena su dva postupka: primjena dither signala i nelinearna kompenzacija trenja. Potonji postupak pruža bolju kvalitetu regulacije no nije primjenjiv u otvorenom krugu. Obzirom da se u primjeni u vozilu, zbog neisplativosti mjerenja momenta, treba koristiti upravljanje u otvorenom krugu, u radu su također razmotreni i načini upravljanja momentom. Osnova svih razmatranih strategija upravljanja je invertirana karakteristika spojke koja predstavlja mapu reference pozicije aktuatora. Osnovna upravljačka strategija proširena je nadalje kompenzacijom trenja zasnovanoj na Coulombovom modelu trenja, dither signalom te kombinacijom prethodne dvije kompenzacije uz prikladno otežavanje svake od njih. Pokazano je da se najbolje performanse u režimu velikih signala mogu postići modelskom kompenzacijom, dither kompenzacija pruža najviše u režimu malih signala dok se kombiniranjem ova dva pristupa postiže dobar kompromis u svim radnim režimima.

Abstract

The application of dry dual clutches with electromechanical actuators improves fuel efficiency and reduces CO2 emissions while retaining the comfort of torque converter automatic transmissions. A prerequisite to achieve this performance is to have well designed transmission shift control, as well as superimposed clutch slip speed closed-loop control and clutch torque control. Different possibilities of clutch torque control in both closed- and open-loop arrangements are proposed, implemented and experimentally verified in this thesis. The considered clutch utilizes a lever-based actuator driven by a DC servomotor. The axial force, produced by the actuator mechanism, is transferred to the diaphragm spring and the pressure plates through the engagement bearing. The clutch torque closed-loop control is achieved by means of an integral-type controller, designed according to the double ratios optimum. The controller exhibits designed performance in the large signal operating mode, but fails to do so in the small signal operating mode, due to the static friction in uence. To compensate for the friction induced effects, two different approaches were considered - dither signal compensation and nonlinear friction compensator. The latter exhibits excellent performance regarding response time and tracking accuracy, but it is not applicable in open-loop control. Considering that torque measurement is not available in the on-vehicle application, different open-loop control strategies have been proposed in the thesis, as well. The basis for any open-loop strategy presented is the inverted clutch static curve which is used as a lookup table for the actuator position reference. This basic open-loop control is further extended with model-based friction compensation, based on the Coulomb friction model or the dither signal, and with a proper weighted combination of the two individual approaches. It has been found out that the model-based friction compensation exhibits best performance in the large signal operating mode, dither signal compensation is favorable in the small signal operating mode, while the combined approach, so-called blended strategy, offers a good trade-off in terms of performance and robustness.

Item Type:	Thesis (Master's thesis (Bologna))
Uncontrolled Keywords:	suha dvostruka spojka; regulacija momenta; upravljanje momentom; dither signal; kompenzacija trenja; eksperimentalna provjera
Keywords (Croatian):	dry dual clutch; closed-loop torque control; open-loop torque control; dither signal; friction compensation; experimental verification
Divisions:	900 Department of Robotics and Production System Automation > 910 Chair of Engineering Automation
Date Deposited:	22 Sep 2014 18:00
Last Modified:	16 Oct 2015 12:49
URI:	http://repozitorij.fsb.hr/id/eprint/2830

Actions (login required)

View Item