Session: AVT-(02,3,7)-01

Paper Number: 116543

116543 - Modeling and Co-Simulation of Hybrid Off-Road Machinery 

Co-simulation is a modeling approach that can be used to simulate systems that combine multiple physical domains in a computationally efficient manner. Hybrid off-road machinery can be modeled with required complexity by using multibody dynamics approach. The model of the machinery body can be combined with a hybrid electric powertrain which includes electrical and mechanical components in the powertrain through co-simulation. This paper describes a co-simulation platform that combines system-level hybrid electric powertrain models with detailed models of off-road machinery with hydraulic implements. This platform can help in comparing various powertrain concepts for off-road machinery. As a case example, two powertrain concepts for a tractor with a hydraulically operated front loader are compared. The dynamic traction and hydraulic loading of the tractor are simulated from user inputs given by a human operator and the resulting interactions of the tractor with a deformable terrain. A double planetary gear powertrain is combined with hydraulic actuators that are coupled, in the first case, directly to the engine, and in the second case, to the battery through a second electric motor. The model with electrically coupled hydraulics is observed to consume lower energy and fuel due to efficient distribution of the demanded power between the diesel engine and the electric battery.

Presenting Author: Giota Goswami LUT University

Presenting Author Biography: Giota Goswami was born in Agartala, India, in 1992. She received her B.Tech. degree in Mechanical Engineering from Kalinga Institute of Industrial Technology, Bhubaneswar, India, in 2014, and her M.S. degree in mechanical engineering from Lappeenranta-Lahti University of Technology LUT, Lappeenranta, Finland, in 2019. She is currently pursuing a Ph.D. degree in mechanical engineering at Lappeenranta-Lahti University of Technology LUT, Lappeenranta, Finland.

From 2014 to 2017, she worked as a Systems Engineer with Tata Consultancy Services Ltd., Kolkata, India. From 2019 to 2020 she was a research assistant in the Laboratory of Machine Dynamics, Lappeenranta-Lahti University of Technology LUT, Lappeenranta, Finland. From 2021 to present, she has been working as a Junior Researcher for the Lappeenranta-Lahti University of Technology LUT, Lappeenranta, Finland. Her research interests include vehicle dynamics, driveline simulations, hybrid powertrains and multibody dynamics.

Authors:

Giota Goswami LUT University
Charles Nutakor LUT University
Jussi Sopanen LUT University