A method of identifying the physical and mechanical parameters of the materials of the carrying structures of radio-electronic systems is described. A computer-aided measuring bench for solving the identification problem is proposed.When designing the structure of modern radio-electronic systems, set up on portable carriers, k is extremely important to take mochanical disturbances into account when designing the apparatus. Such disturbances cause from one-third to half of all the failures of radio-electronic apparatus [1]. To solve the problem of protecting the apparatus from mechanical disturbances successfully the designer must have available the required information on the methods and procedures for protecting radioelectronic apparatus, and must also be able to analyze the effect of mechanical disturbances on the apparatus.The carrier structures of radio-eloctronic apparatus --the units and printed components --can be regarded as plane structures or sets of these with the electrical and radio components mounted on them [2]. Forced oscillations of the plane structures are described by the following equation [3] 9 t 2--i+ z,l § f 2:,lwhere D1 = EIS3/[12(1 --/~t/~2)] , D2 = E2S3/[12( 1 --/zt/~2)] are the cylindrical stiffnesses of the plane structures along the x and y axes, D3 = DI/z2 + 2Dk = D2/~1 + 2Dk is the principal stiffness, D k = GS3/12 is the torsional stiffness, S is the thickness of the plane structure, G = ~.45/[2(1 + P45)] is the shear modulus of the material of the plane structure, E l, E 2, E45 are the moduli of elasticity of the material of the plane structures along the x and y axes and at an angle of 45* to the axes respectively (we assume that the direction of the x and y axes coincides with the direction of the sides of the plane structures), /~t, ~t2, ~45 are Poisson's ratios of the material of the plane structures along the x and y axes and at an angle of 45* to the axes, respectively, 7i is the complex bending of the plane structures at a point with coordinates x and y at the instant of time t, m i is the mass of the plane structure per unit area at the point i and qi (x, y, t) is the external force exciting the oscillations per unit area at the point i at the instant of time t. A method of changing from the analytical model (I) to a topological model, which is an electromechanical analogy, was described in [4]. This change is made using the method of finite differences. If we divide the plane structure into a rectangular mesh with n nodal points, then for each node of the topological model we can write the following equation in unified notation:i I where ~% = 2,. q% = Z.,. % = Zo are potential variables of the nodal points of the topological model of the plane structure, Zr, Zi are the complex amplitudes of the displacement of the r-th and i-th nodal points, ~ is the complex amplitude of the dis-