Wheelset parameter estimation in the self-tuning control of a 2-axle high-speed railway vehicle

Abstract

Application of active control to the primary suspension of a railway vehicle not only has the potential to improve the vehicle’s stability and running performance (Goodall, 1999) but also allows the determination of the wheelset’s conicity ?(t), longitudinal creep coefficient, f11(t), and lateral creep coefficient, f22(t). These parameters are time-varying and their values may change infrequently and abruptly. The ability to estimate these values effectively permits the use of a self-tuning regulator that can adapt to system changes and maintain the wheelset’s stability over the whole range of parameter variations.