Heavy Truck Dual-Axle eMotor Powertrain Model Using MotionSolve

GTT Adam

Preface

Altair's MotionSolve is a powerful software tool for simulating and analyzing vehicle dynamics and performance. The Vehicle Tools Extension allows the User to easily assemble common vehicle platforms and simulate a wide range of vehicle events and maneuvers, such as lane changes, hill climbs, handling tests, and more.

As a newer User, it is important to learn how to modify existing vehicle models to better replicate your goal vehicle model.

Introduction

In this article we modify a single-axle rear driveline heavy truck to represent a dual-axle electric drive heavy truck. To achieve this, we will duplicate the single-axle driveline, replace the existing rear axle, remove the north-south driveshafts, and add electric motor torques as inputs to the mechanical differentials.

Model Assembly

Please follow the video below to assemble your own model:

Heavy_Truck_eMotor.mp4

Next Steps

There is observable noise in the eMotor demand torque signal during the event, which shows that the controller may be reacting too quickly to the change in speed. This response can be smoothed out in several ways:

• Limiting or governing the amount of available torque to the eMotor.
• Changing the smoothing frequency of the Throttle signal, found under Signal Settings in the event properties.
• Implementing your own eMotor model in a Twin Activate cosimulation, which can read the throttle demand signal from the Altair Driver and then calculate a more representative output torque.

Hopefully this process can be of use to you in your MotionView journey!

Helpful Links

Looking for more material on MotionView/MotionSolve? Check out our available eLearning courses linked below!

MotionView/MotionSolve Introduction v2023 eLearning

MotionSolve v2023 for Vehicle Modeling eLearning