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The effect of input pulse shape on stress wave propagation in a thick plate
Hora, Petr
The effect geometrical dispersion is that the energy in a wave-packet propagates at different speeds depending on its frequency. It is shown that duration of a wave-packet increases linearly with propagation distance and also that the duration of a wave-packet after a given propagation distance depends on the input signal. Some conclusions are made concerning the Lamb wave propagation in a steel plate.
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Problems of a limit fatigue stress under combined loading
Balda, Miroslav ; Svoboda, Jaroslav
The theory of fatigue life of structures under combined synchronized harmonic loading has been extended. Limit stress of combined loadding corresponding the fatigue limits has been assembtet from experimental data. They obey both the law of ellipse for in-phaseloading and a bit modified law for out-of-phase loading. A new formula for its exponent has been built.
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Stochastic policy in Q-lerning used for control of AMB
Březina, Tomáš ; Krejsa, Jiří ; Věchet, S.
A great intention is lately focused on Reinforcement Learning (RL) methods. The article is focused on improving model free RL method known as Q-learning used on active magnetic bearing model. Stochastic strategy and adaptive integration step increased the speed of learning approximately hundred times. Impossibility of using proposed improvement online is the only drawback, however it might be used for pretraining and further fined online.
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