Hardware-in-the-Loop Electric Drive Stand Issues for Jet Engine Simulation

Mitigating Time Delays: An Evaluation of Their Impact Using a Simulation Model of an Aircraft Power System Demonstrator Facility

“…figure 14 indicates the first-order representation (green trace) at 16 rad/s will have a gain of 1.58, which matches the gain appearing in figure 15(a) at approximately . s. 20 3 When the third-order time-delay compensator is implemented, as shown in figure 15(b), the delay compensation performance is similar to the first-order delay-compensator response in figure 15(a). it is demonstrated in figure 15 that both the time-delay compensators cannot cope with the step increase in the pla but provide a satisfactory pla step-down response, as the effective frequency of the pla step increase exceeds the bandwidth of the compensator, whereas the effective frequency of the pla step decrease is within the compensator bandwidth.…”

“…in such a case, the inertia of the gas engine is much smaller than that of the drive emulator of the same power rating [9], which gives faster emulated engine dynamics. the emulation inaccuracy from the open-loop delay would become prominent for such faster engine applications and may result in an incorrect assessment of the aero generator [20]. however, the open-loop delay would not affect the system stability due to the fact that the time-delay element will not be present in the characteristic polynomial of the system transfer function.…”

Drive System Dynamics Compensator for a Mechanical System Emulator

“…The environment data (altitude and Mach number) was set to the default values for this investigation. Throttle (pilot lever angle (PLA)) demands and electrical power extraction commands are normally used to assess the aero engine's performance, where a step change in commanded PLA is the most demanding scenario [25]. Therefore, the experimental and simulation tests of the PLA step change and generator load steps are used to validate the proposed emulation technique for this study.…”

A new application of the hardware in the loop test of the min–max controller for turbofan engine fuel control

“…Miller et al performed a hardware test on the jet engine ring to improve its control system performance. Simulations of the cockpit have indeed been carried out to accomplish experimental tests using hardware simulations in the loop 12 …”

“…Simulations of the cockpit have indeed been carried out to accomplish experimental tests using hardware simulations in the loop. 12 Cao et al have created a system for controlling engine idle speed using fuzzy logic. This can be strict due to the system's complexity and its time-varying nature.…”