Training. allowance. Perm: Perm . gov. Tech. Un-ta, 2010. 302 s. ISBN 978-5-398-00500-4 . The general properties of oscillatory processes occurring in radio, mechanical and other systems, as well as various methods of studying them are considered. Much attention is paid to the consideration of parametric, autovibration and other nonlinear systems. The study of these oscillatory systems was carried out by well-known methods of oscillation theory without a detailed presentation and justification of the methods themselves. On the most important topics are tasks for independent decision. Designed for students of electrical engineering areas and specialties of technical universities . Content. Internal fluctuations in conservative systems. General approach to the consideration of fluctuations . Phase portrait of the oscillating system. Fluctuations of the pendulum. The method of successive approximations. Fluctuations in the electrical circuit with nonlinear elements. Compounding of harmonic oscillations. Distinctions in Dissipative Systems . Peculiarities of oscillations in dissipative systems and methods of their consideration. Harmonic Oscillator with attenuation. Step-by-step review method. Linear cases of realization of forces of dry friction . Method of slowly changing amplitudes. Forced fluctuation . Forced oscillations in the linear system under harmonic influence. Electric Fluctuations . Impedance. Depreciation of oscillations. Anti-resonance. Harmonic oscillator under non-periodic force. Resonance in nonlinear systems. Parametric oscillations. Parametric excitation. Parametric resonance in a conservative linear system. Mathieu's Equation . Movement in a rapidly oscillating field . Pendulum Capitsa . Parametric resonance in nonlinear systems (parametric generator), Auto fluctuation. Basic definitions and classification of auto-oscillation systems. The Van der Paul Equation . Dependence of the form of auto-oscillations on the parameters of the system. Thomson type auto-oscillation systems. Relaxation fluctuations. Stability of oscillations in linearized systems. Behavior of auto-oscillation systems under external influence. Related Fluctuations. Partial systems. Normal modes of oscillation. Energy exchange between partial systems . Forced Fluctuations in Linked Systems. Fluctuations in a system with an arbitrary number of degrees of freedom. Fluctuations in Distributed Systems . Phase and group speed of waves. Waves in a One-Dimensional Chain of Atoms . KleinGordon equation. Nature of variance. Waves in transmission lines. Waveguides. The frequency and speed of waves in the waveguide. Tasks for an independent solution. Answers to Tasks . Mathematical models of active bipoles and quadriples. Methods of Compiling Equations for Electrical Circuits. Electronic Generators . Some trigonometric ratios and integrals