THE GENERALIZED METHOD OF IDENTIFICATION OF A NONLINEAR DYNAMIC OBJECT WITH UTILIZATION OF A CONSTANT LOW7INERTIA OF EXTERNAL

Petko V.I., Ph. D. in eng., the Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, the Republik of Belarus

Kukonin V.E., Ph. D. in eng., the Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, the Republik of Belarus

The generalized method of identification of a nonlinear dynamic object (NDO) and NDO's mathematical model are considered. Instead of an NDO, the modeling of a linear dynamic object (LDO) is proposed, when in general case the pulse characteristic (PC) varies in form, amplitude and length depending on the level of an input signal. The research of the created mathematical model has been carry out by computer facilities.

nonlinear dynamic object, linear dynamic object, pulse characteristic

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ABOUT STABILIZATION FOR UNSTABLE ROTATION OF LAGRANGE TOP WITH CAVITY CONTAINING FLUID

Khomyak T.V., Donetsk National University, Ukraine

The possibility of stabilization for unstable rotation of the Lagrange top with ideal fluid by means of rotating rigid bodies is shown in the limits of necessary conditions of stability. One of rotating rigid bodies has a fixed point. Numerical researches of influence parameters of rotating rigid bodies on effect of stabilization are carried out.

unstable rotation, ideal fluid, rotating rigid bodies, effect of stabilization

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THEORETICAL BASIS OF CALCULATION OF SHORT DURABILITY OF WOODWORKING TOOLS CUTTER EDGE

Grishkevich A.A., Ph. D. in eng., the Belarusian State Technological University, Minsk, the Republik of Belarus

Klubkov A.P., Ph. D. in eng., the Belarusian State Technological University, Minsk, the Repulik of Belarus

Theoretical dependences permitting todefine normal tensions in a cross-section of woodworking tools at the start-time of cutting with a sharp knife under different schemes of front surface load are developed. The leading factor determining the value of normal tensions arising in the cross-section of a wedge-knife from tangent (hogging) cutting force are discovered. The analysis of the previously developed formulas for defining the grade of knife's tip winding is presented.

woodworking tools, normal tensions, cross-section

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DEFORMATIVE CHARACTERISTICS OF PREPREG TEXTILE MATERIAL

Vasilevich Yu.V., the Belarusian National Technical University, Minsk, the Republik of Belarus

Sakhonenko V.M., the Belarusian National Technical University, Minsk, the Republik of Belarus

Sakhonenko S.V., the Belarusian National Technical University, Minsk, the Republik of Belarus

The connection between relative coefficients of nonelastic and elastic strain duriug tension and compression of the prepreg textile material is found on the basis of the threads points displacement consideration.

nonelastic and elastic strain, prepreg textile material

• Kolganov V.I. [et al.] Method of study of stress-strain state of the uncured composite-fiber materials [Metod issledovanija naprjazhenno-deformirovannogo sostojanija neotverzhdennyh kompozicionno-voloknistyh materialov]. Nerazrushajushhij kontrol' i diagnostika okruzhajushhej sredy, materialov i promyshlennyh izdelij: mezhvuz. sb. [Nondestructive testing and diagnostics of the surrounding environment, materials and industrial products: int. coll.], St. Petersburg, 2001, no. 4, pp. 125-134.
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