HiL simulace jízdních cyklů a její validace

Abstract

To establish early niche in the market, vehicles being produced these days are growing exponentially in terms of complexity (hardware and especially in software). Keeping pace with this advancement, verifying and validating design becomes crucial steps. Hardware-in-the-loop (HIL) tests is one of the well adopted simulation test in the industry to overcome this challenge. HIL allows to test functionality and behavior of any vehicle component (any actuators or sensors) as though it is on the real vehicle, simulating all driving conditions, and identify all faults within any unit. In simple words, HIL replaces the need of assembled final product and hence comprehensive testing can be performed at early stage, giving the engineers and designer a head start. Hardware-in-the-loop (HIL) simulation is used for all aspects of product development, including safety-relevant functions, simulating behavior of vehicle performance, etc. Nowadays, it is a standard component in the vehicle development process which provides various methods for testing of electronic control unit (ECU) software. All the vehicles physical parameters like temperature, air flow, vehicle speed, engine rpm, etc., are continuously monitored by electronic sensors and communicated, over the internal vehicle communications protocol, to the Main Control Unit for further processing. This study present the selection of parameters used for calculation of the fuel consumption and prediction of CO2 emissions on a simple driving cycle. These measurements are retrieved from Engine Control Module and OBD-II diagnostic protocol in case of HIL and real vehicle respectively. Comparing the driving cycle HIL data with data the real vehicle measurements, HIL is validated which help to understand the effects of various factors in the estimation of fuel consumption and CO2 emissions. Further, using the results from this validation we can get clear depiction on how HIL will behave on WLTP cycle.

To establish early niche in the market, vehicles being produced these days are growing exponentially in terms of complexity (hardware and especially in software). Keeping pace with this advancement, verifying and validating design becomes crucial steps. Hardware-in-the-loop (HIL) tests is one of the well adopted simulation test in the industry to overcome this challenge. HIL allows to test functionality and behavior of any vehicle component (any actuators or sensors) as though it is on the real vehicle, simulating all driving conditions, and identify all faults within any unit. In simple words, HIL replaces the need of assembled final product and hence comprehensive testing can be performed at early stage, giving the engineers and designer a head start. Hardware-in-the-loop (HIL) simulation is used for all aspects of product development, including safety-relevant functions, simulating behavior of vehicle performance, etc. Nowadays, it is a standard component in the vehicle development process which provides various methods for testing of electronic control unit (ECU) software. All the vehicles physical parameters like temperature, air flow, vehicle speed, engine rpm, etc., are continuously monitored by electronic sensors and communicated, over the internal vehicle communications protocol, to the Main Control Unit for further processing. This study present the selection of parameters used for calculation of the fuel consumption and prediction of CO2 emissions on a simple driving cycle. These measurements are retrieved from Engine Control Module and OBD-II diagnostic protocol in case of HIL and real vehicle respectively. Comparing the driving cycle HIL data with data the real vehicle measurements, HIL is validated which help to understand the effects of various factors in the estimation of fuel consumption and CO2 emissions. Further, using the results from this validation we can get clear depiction on how HIL will behave on WLTP cycle.