Abstract
In this paper, a behaviour-level modelling method based on external characteristic parameter extraction is proposed. For the problems of low solution efficiency and poor convergence of the physical model of DC-DC power module in switching mode in the simulation of aerospace power supply and distribution system, this method equates the DC-DC power module as a "black box" model, which describes the external functional performance characteristics rather than the internal composition structure and principle. While maintaining the system level simulation accuracy, the simulation efficiency is greatly improved, and the problem of poor convergence caused by multiple time scales is avoided. The simulation results show that this method can effectively solve the problems of low precision, low efficiency and poor convergence of traditional system level simulation and has obvious advantages over traditional schemes.
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