Electro-Mechanical-Thermal performance and stability of aircraft energy networks with pulse power loads

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Department of Electrical and Computer Engineering


Modern aircraft have an increasing demand for pulse power loads which includes new weapon technologies and advanced avionics. These pulse power loads have thermal properties that couple to the electrical system that can lead to non-linear destabilizing effects at low and high temperatures. These non-linear electrical stability issues carry through to the mechanical and thermal systems of the aircraft and can damage components. The load is characterized by its duty cycle, period and power level. For a given pulse load, the system is defined as metastable if there is a nonlinear limit cycle that remains bounded within the defined bus voltage limits. Regions of stability, metastability, marginal metastability, and instability are determined based on bus voltage transient tolerances. In this paper a reduced-order non-linear model of an aircraft's coupled electrical-mechanical-thermal (EMT) system is used to demonstrate the stability, metastability, and performance caused by the pulse load coupled with the EMT system.

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IEEE Transactions on Aerospace and Electronic Systems