Parameterization of a Novel Stepper Motor Driven Orbitrol Valve used in Articulated Steering System

Articulated steering systems are pivotal in off-road vehicles operating in constrained and narrow spaces. This research explores the mathematical modelling of the Stepper Motor Driven Orbitrol Valve (SMDOV), focusing on steady-state performance and validating findings through experimental data. Using the MATLAB®/Simulink platform, a comprehensive mathematical model of the system is developed. Experimentally, a sprocket-chain drive mechanism links the stepper motor to the orbitrol valve, which can provide a fixed steering rate. Further, the effects of valve leakage, flow responses under varying steering rates, and external loads are analysed. The model validation offers insights into the influence of damping coefficients and leakage resistance on the system performance. Moreover, an empirical relationship is proposed based on system inputs for future investigations into the dynamic behaviour of the Orbitrol valve-driven articulated steering system. This work highlights key parametric values of the SMDOV system and advances the automation of articulated vehicle steering mechanisms. This article provides more significant insights about the stepper motor driven orbitrol valve characteristics. It helps in developing the orbitrol valve controlled automatic steering mechanism for better control of the articulated vehicles.