Hydraulic component design library leads to process improvements, cost savings

  • 24-Jan-2011 01:52 EST

Part of Messier-Bugatti's integrated Steering-Landing-Kneeling (SLK) system for Airbus.

As one of the main systems integrators on the Airbus A400M and the upcoming Airbus A350 aircraft programs, Messier-Bugatti has a proven reputation as a key partner to aircraft manufacturers. Examples of continuous innovation include Messier-Bugatti’s integrated SLK (Steering-Landing-Kneeling) system, a "three-in-one" integrated system that combines nose-wheel steering, landing-gear extension and retraction, and a special “kneeling” function that lowers or raises the aircraft for easier loading and unloading.

To design a complex hydraulic system such as this, the team at Messier-Bugatti counted on the LMS Imagine.Lab Ground Loads solution to develop system models that met Airbus’ SLK technical requirements.

Messier-Bugatti engineers were able to design detailed hydraulic components such as new selector valves in the most efficient and economic manner as well as obtaining a global model of the hydraulic system.

“Thanks to our customized LMS Imagine.Lab HCD library, we were able to model detailed hydraulic equipment by assembling components from the library. Then, we simply entered the real design parameters to check the equipment performance and evaluate the design for transient phenomena throughout the entire system—a vital measurement in aeronautics. Not only does LMS Imagine.Lab deliver highly accurate results, the LMS Imagine.Lab AMESim solution enables us to eliminate on average two to three costly test sessions per component,” said Jérôme Fraval, Performance & Modeling Engineer at Messier-Bugatti. “It is a very powerful tool that lets us think about how to make the component in the best possible manner.”

The solution enables Messier-Bugatti engineers to go deep into the details when modeling system components. They can also integrate test bench data into the early-stage simulation process.

This complementary aspect between test and simulation offers a certain advantage for Messier-Bugatti because every design that they test is right the first time.

Building on its experience with the Airbus A380, Messier-Bugatti developed innovative hybrid electrohydraulic equipment for the A400M aircraft, including uplocks for the landing gear and gear doors, and backup actuators that open the doors under all conditions. Backing up normal hydraulic actuation, the patented electrical backup mechanical hydraulic actuator (EBMA) is a Messier-Bugatti innovation to ensure door opening even in case of hydraulic failure.

For the upcoming Airbus A350 aircraft, Messier-Bugatti is using LMS Imagine.Lab AMESim to analyze planned improvements on its systems as well as designing new hydraulic equipment to decrease water hammer effects. With the support of LMS Imagine.Lab AMESim, they are successfully optimizing the design and reducing manufacturing costs.

Jennifer Schlegel, Senior Editor, LMS International, wrote this article for Aerospace Engineering.

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