Helicopter engine-in-the-loop test setup

M. Kerler, J. Hönle, W. Erhard, H. P. Kau

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations


During the development process of new systems computer-based simulations are often used today. Depending on the system a point is sometimes reached where only computer-based simulations are not sufficient anymore. Beyond this point, the required testing of the system prior to product launch can be furthered by using hardware-in-the-loop (HIL) systems. This paper describes a HIL system consisting of a real helicopter turboshaft engine and a helicopter flight dynamics simulation. As the term HIL is usually used for describing controller testing, the whole system is renamed by the term engine-in-the-loop (EIL). Nevertheless, it can also be used for evaluating new engine controller concepts. Another application is analysis of the differences in dynamic behavior of a virtual and real engine in real time and using the EIL for educational purposes. For the realization of the EIL the existing institute's test bed of the Allison 250-C20B engine is used. An electric dynamometer simulates the loads of the helicopter rotors. The engine controller consists of a controller model running on a real-time computer and a fuel control unit. For the helicopter flight dynamics simulation a non-linear flight dynamics model of the BO 105 helicopter is implemented. For verification and validation of the EIL system simple flight missions were performed and the test data were evaluated.

Original languageEnglish
Title of host publication39th European Rotorcraft Forum 2013, ERF 2013
PublisherRussian Helicopters
Number of pages3
ISBN (Electronic)9781510810075
StatePublished - 2013
Event39th European Rotorcraft Forum 2013, ERF 2013 - Moscow, Russian Federation
Duration: 3 Sep 20136 Sep 2013

Publication series

Name39th European Rotorcraft Forum 2013, ERF 2013


Conference39th European Rotorcraft Forum 2013, ERF 2013
Country/TerritoryRussian Federation


Dive into the research topics of 'Helicopter engine-in-the-loop test setup'. Together they form a unique fingerprint.

Cite this