Development of a Graphical User Interface (GUI) Based Tool for Vehicle Dynamics Evaluation
To be published on November 21, 2019 by SAE International in United States
Event: NuGen Summit
Title Development of a Graphical User Interface (GUI) Based Tool for Vehicle Dynamics Evaluation Authors Mr. Shubham Kedia, Dr. Divyanshu Joshi, Dr. Muthiah Saravanan Mahindra Research Valley, Mahindra & Mahindra, Chennai Objective Objective metrics for evaluation of major vehicle dynamics performance attributes i.e. ride, handling and steering are required to compare, validate and optimize dynamic behavior of vehicles. Some of these objective metrics are recommended and defined by ISO and SAE, which involve data processing, statistical analysis and complex mathematical operations on acquired data, through simulations or experimental testing. Due to the complexity of operations and volume of data, evaluation is often time consuming and tedious. Process automation using existing tools such as MS Excel, nCode, Siemens LMS, etc. includes several limitations and challenges, which make it cumbersome to implement. In the current work, a GUI based post-processing tool is developed for automated evaluation of ride, handling and steering performance. Methodology This work is about development of a centralized platform for quantification, visualization and comparison of ride, handling and steering performance metrics from testing and simulation data as per relevant ISO standards. In this work ISO standards related to ride (ISO 2631-1, 2631-5, 10326), handling (ISO 4138, 7401) and steering (ISO 13674-1) are implemented and automated using built-in functions and toolboxes in MATLAB. Further, several mathematical tools and operations such as plot comparisons in time and frequency domain, filtering (band pass), data treatment (detrending, median filtering, etc.), coherence and delays, etc. are included, which are frequently used in addition to standard ISO and SAE metrics. Complete package is compiled as a user-friendly standalone graphical user interface (GUI), which enables cross-domain users to make use of it with minimal tool usage guidelines and with no license requirement. Results Objective metrics computed through this tool are comparable with existing tools (ex. Excel macros and nCode). Tool is well received by various internal teams and has received a greatly positive feedback for extra-ordinary time saving and being simple to use. It reduces the entire evaluation time by nearly 90 percent, enhancing the development process and productivity of the user teams. Limitations of this study Current version of the tool i.e. V1, does not include brake performance evaluation. Also, the tool is a post-processing tool and is not capable of modeling the vehicle dynamics. What does the paper offer that is new in the field in comparison to other works of the author Tool enables cross domain users to perform automated evaluation, comparison and visualization which, to authors' knowledge, is rare. The same tool can be used across different teams and at various stages of vehicle development, simplifying the vehicle dynamics evaluation and saving manhours. Being a stand-alone tool, it eliminates the license requirements for several popular in-use tools and thereby saving cost. Conclusion Presented tool offers a simplified solution for implementing various performance metrics for ride, handling and steering with a quick turn-around time. Tool can also provide onsite support through its fast computing platform, enabling users to perform live validation. To summarize, it's a novel tool which incurs no license or maintenance cost after its development.