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This article describes how to calculate the number of algebraic operations necessary to implement block matrix inversion that occur, among others, in mathematical models of modern positioning systems of mass storage devices. The inversion method of block matrices is presented as well. Presented form of general formulas describing the calculation complexity of inverted form of block matrix were prepared for three different cases f their division into in er al blocks. The obtained results are compared with a standard Gaussian method and the "inv" method used in Matlab. The proposed method for matrix inversion is much more effective in comparison in standard Matlab matrix inversion "inv" function (almost two times faster) and is much less numerically complex than standard Gauss method.

Inversion of selected structures of block matrices of chosen mechatronic systems