User Stories

VE Commercial Vehicles Establishes Ride Comfort Characteristics of Tractor-Semitrailers

“In a tractor-trailer, we get many components from suppliers and sometimes the parameter what we need may or may not occur during our testing. Simulink Design Optimization is a very handy tool when it comes to identify some of these unknown parameters.”

-  Sarnab Debnath, VE Commercial Vehicles Ltd.

Analyzing tractor-semitrailer ride comfort characteristics is paramount for ensuring less fatigue and stress for drivers during the 8 or more hours per day they spend in the vehicle. ISO 2631-1 defines the acceptable criteria for ride comfort characteristics of the vehicle.

Engineers from VE Commercial Vehicles, a Volvo group and Eicher Motors joint venture, wanted to improve ride comfort in tractor-semitrailers using a virtual environment, which saves the cost and time of prototype development and iterations on physical vehicle.

Using Simulink® and Simulink Design Optimization™, they developed a detailed 7-degrees-of-freedom mathematical model to analyze the characteristics of the vibrations in a virtual environment. They then carried out experiments on a physical vehicle to obtain acceleration time-domain data by mounting accelerometers at different locations on the vehicle. The vehicle is run on A and B class road profiles to account for random vibrations. The same road vibrations are used as an input to the mathematical model to generate simulated data, and a correlation is established between simulated and actual data using time-domain and frequency-domain analysis.

Key Outcomes

  • A versatile, parameterized mathematical model for ride comfort analysis of tractor-semitrailers using virtual testing

 

  • Close to 90% correlation between experimental and simulated ride-comfort data for both A and B class road profiles

  • Fast and cost-effective solution to optimize ride-comfort elements