ABSTRACT
This paper is dedicated to investigate the static and dynamic behavior of a hydro
mechanical anti-skid braking system. The system consists of a pilot operated
pressure reducing valve and a hydro mechanical anti-skid control unit. The system is
designed to fulfill the essential requirements of the anti-skid braking system. The
steady state and transient performance of the system and its basic components were
investigated considering different operating conditions. Detailed nonlinear
mathematical models for the system and its components were deduced considering
the tire-ground interface. These mathematical models were used to develop Simulink
computer simulation programs. The simulation programs were used to investigate
the effect of the constructional and operational parameters on the dynamic behavior
of the pilot operated pressure reducing valve; mainly the variation of inlet pressure,
spring stiffness, damper radial clearance. The operating characteristics of the
braking system with the hydro mechanical anti-skid control unit was investigated and
analyzed for the cases of driving over dry and wet concrete pavement. The results
are presented and discussed.