Simulation of a spacecraft noise immune power network

Аuthors

Kuksenko S. P.

Tomsk State University of Control Systems and Radioelectronics, 40, Lenin str., Tomsk, 634050, Russia

e-mail: ksergp@tu.tusur.ru

Abstract

The article presents a generalized characteristic of a spacecraft power grid and tendencies of its improvement with regard to power buses application. It proves the relevance of mathematical modelling employing with account for electromagnetic compatibility requirements while the system designing. The article presents a brief description of the software prototype developing specifics in TUSUR for designing elements of the spacecraft distribution network. The prototype is based on the TALGAT system, which functional was updated. The system was employed earlier while fulfilling several space projects. TEM-approximation, the method of moments and the modified method of nodal potentials for calculating parameters of the of transmission lines segments and the response at the end of the structure were used as the mathematical basis for the software prototype developing. Such an approach allows significant simulation time saving, and thus, considering a greater number of possible topologies of the power supply network, as well as speeding up the process of its designing, as compared to electro-dynamic simulation.

The article presents the simulation results of the power bus and wire taps connected to it, as well as the development of a module for evaluating the effectiveness of shielding enclosures with apertures and a database of conducted interference signals. Computing of N-norms used to characterize the signal in the time domain and determine the limit of susceptibility of the equipment were also implemented. Thus, they may be used to evaluate not only the immunity of the spacecraft power supply network, but also its reliability, as well as to identify the most critical network nodes to eliminate product failures during operation.

The approach to reducing the time spent on simulation was tested. It is demonstrated, that the simulation can be accelerated up to 19 times when the frequency dependence of the relative dielectric constant of the dielectric is accounted for.

Keywords:

power system, spacecraft, simulation

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