Experimental and model studies on the influence of the run flat tire damage on braking dynamics of the multi-axial special purpose vehicle

Abstract

Article citation info: (*) Tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie www.ein.org.pl Prochowski L, wAch w, JAckowski J, Pieniążek w. experimental and model studies on the influence of the run flat tire damage on braking dynamics of the multi-axial special purpose vehicle. eksploatacja i niezawodnosc -Maintenance and reliability 2015; 17 (1): 118-128. Leon Prochowski wojciech wAch Jerzy JAckowski wiesław PieniążekExpErimEntal and modEl studiEs on thE influEncE of thE run flat tirE damagE on braking dynamics of thE multi-axial spEcial purposE vEhiclE EkspErymEntalnE i modElowE badania wpływu uszkodzEnia opon run flat na dynamikę hamowania wiEloosiowEgo pojazdu spEcjalnEgo* Tire damage, that occurs quite often during operation of special purpose vehicles (building, forest, military, agricultural heavyduty vehicles), affects a vehicle motion also during sudden braking. Motion of a four-axial vehicle has been analysed in order to evaluate the influence of tire damage (cracking, tearing) on its behaviour during sudden braking and based on that to evaluate the possibilities of driver's reactions to motion disorders resulting from that emergency condition. Using the PC-Crash software, a vehicle model was designed allowing for simulation of special-purpose vehicle motion. The vehicle model includes a possibility of occurring of sudden tire damage when in motion. In such situation a model of cooperation of a tire and a surface is of crucial significance. A semi-empirical, non-linear TMeasy tire model was used. Its parameters were obtained on the basis of the results of the tests performed on 14.00R20 tires with run flat inserts. A vehicle model parameterization was based on the results of the vehicle measurements, however the validation was based on the results of experimental road tests of braking with damaged tires. Performed calculations and simulations indicated that when braking is started a process of vehicle deviation and related motion track modification is initialized. The motion track deviation increases as the initial braking speed is increased. Keywords: tire use, special purpose vehicle operation, active safety, tire damage, run flat tires, driver training.Uszkodzenie opony, które dość często pojawia się podczas eksploatacji pojazdów specjalnych (budowlane, leśne, militarne, rolnicze) IntroductionDifficult conditions of special purpose vehicle operation result in high tire damage risk. The nature of damage varies but it always affects the vehicle traction properties and causes increased driver's effort and driving safety threat. A vehicle with damaged tires (if it is still able to continue a drive, even a short-distance one) has increased motion resistance and it is hard to keep an intended track of motion.The analyses being carried out further on refer to the braking process of a vehicle equipped with run flat tires. The wheels with that type of equipment can be driven for a short distance after tire damage.The goal of this paper is to analyse the beh...

Tire blow-out control for direct drive electric vehicles using reconfiguration of torque distribution and vertical load

“…To begin with, the greatest challenge comes from vehicle system stability control, which covers the lateral and longitudinal stability control for the vehicle with tire blowout in the freeway. As the fundamental performance, vehicle lateral stability control has been widely investigated via applying conventional electronic stability program and lane keeping control techniques; see Blythe et al (1998); Prochowski et al (2015); Tandy et al (2013); Bäcker et al (2017); Jin et al (2018); and Wang et al (2016a). For example, Bäcker et al (2017) reported a simulation case to imitate a tire inflation pressure loss and its consequences for the vehicle stability, and electric stability controller was designed to assure vehicle lateral stability after tire blowout.…”