Validation of brake control systems is becoming increasingly supported by simulations executed on test benches. Performance and test speed are largely determined by the degree of automation of the tool chain used. Elektronische Fahrwerksysteme GmbH (EFS) shows how it has moved to fully automated test execution and the replacement of its entire tool chain in ongoing operation of ESC testing.
MODEL REQUIREMENTS FOR VIRTUAL VALIDATION
As a result of the diversity of functions and derivatives, as well as efforts to increase efficiency of hardware-in-theloop (HiL) testing for vehicle stability functionalities, test tasks and validation tasks are assigned increasingly to the virtual test drives. The entire working environment of the virtual test drive, in addition to driving dynamics modelling, must also be flexible and highly automatable and fulfil many additional requirements, in order to be capable of handling the fast-growing complexity of virtual validation methods. Here, the development of such requirement validation includes examination and demonstration of how full migration of an existing tool chain for functional brake control system validation, to HiL test rigs in ongoing operation, could be achieved and which motivators were defined by the individual components.
SCOPE ESTIMATE AND POTENTIAL COURSES OF ACTION
The focus on the development starts in 2011 with intensive validation of selected brake control functions, such as the electronic parking brake and central stopping and deceleration management, on HiL test rigs. 1 illustrates the development of the test scope levels. Both staff and test scopes, measured as a number of manoeuvres executable on ESC-HiL, are continually increasing with a slightly exponential character. Test execution, test bench design, and model development, at the start of the review between 2011 and 2014, were heavily characterised by highly specialised function manipulation of the software components to be tested: each test scope for a component is assigned to a single test bench together with an individualised braking system, Restbus driving dynamics model adaptations, and a specialised development partner.
This story is from the November 2017 edition of Auto Tech Review.
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This story is from the November 2017 edition of Auto Tech Review.
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