Discrete-Time Model of a Two-Speed PowerShift suitable for Real-Time Control and Simulation

TL;DR

This paper introduces a discrete-time model for two-speed powershift clutches, enabling precise torque computation and control logic suitable for real-time simulation and control applications.

Contribution

It presents a novel discrete-time modeling approach for clutch engagement in two-speed powershifts, improving real-time applicability over continuous models.

Findings

Model accurately computes clutch engagement torque.

Control logic effectively manages engagement/disengagement phases.

Simulation results demonstrate real-time suitability.

Abstract

In this paper, a new discrete-time approach to model the clutches engagement/disengagement in a two-speed powershift is proposed. The core idea is the development of a model for the computation of the exact torque needed to achieve the clutches engagement, including both the cases of single clutch engagement and of simultaneous clutch engagement (full lock condition). Based on this, the control logic for the clutches engagement and disengagement phases is also developed. The advantages in terms of real-time applicability with respect to the continuous-time version are shown through extensive simulation results.