b'Aerospace | Engineer Innovationcovers the upper deck and main gearbox compartment. Around 90 percent of the hydraulic circuit is in this area. That is what Lopez-Velasco analyzes: Based on the first scheme of the hydraulic system (modeled according to normal and failure cases conditions), we can start the thermal modeling using Simcenter Amesim, says Lopez-Velasco. One of the questions that Simcenter Amesim helps us clarify is whether it is required to coolFigure 4: Full dynamics test bench Figure 5: Hydraulic actuator test benchthe fluidin that case we need to use a heat exchanger. Then during the development there are several loops ofIn this case, Genot and Lopez-Velasco calculation to refine the model. reached an accurate result because the difference between the Simcenter Saving time on test campaigns Amesim modeling and the test bench Of course, tests remain mandatory forresults only varied by +/-5 degrees modeling construction and validation,Celsius while the aircraft was says Lopez-Velasco. Using Simcenterstationary.Amesim for system simulation enables us to anticipate model architecture soModeling with Simcenter Amesim we can save time on the testpermits us to anticipate the design and campaigns because our model isarchitecture freeze of the hydraulics already fine-tuned. systems (routing, tank, heat exchanger) to secure the development During test campaigns, Airbuscost and planning, says Genot.Helicopters teams test the system in normal and failure modes. TheIn the future, Genot and Lopez-Velasco measurements are done at differentplan to study different weather cases, levels. They assess oil temperature,work on transient calculations (not ambient temperature, velocities,only for stationary analyses) and pressures and flowrate. In addition tointegrate a real-time platform with comparing the test and simulationSimcenter Amesim. nresult, the idea is also to refine the parameters of the simulation model based on the test results. The purpose is to make the model as true as possible to the physical version of the product. Modeling with Simcenter Amesim permits us to anticipate the design and architecture freeze of the hydraulics systems (routing, tank, heat exchanger) to secure the development cost and planning.Benoit Genot Hydraulic and flight control engineer Airbus Helicopters45'