Dr. Schlicik's Gyroscopic Apparatus for Preventing Ships from Rolling

Electromagnetic Gyroscopic Motion

1 Mathematics Department, Preparatory Year Deanship, UmmAl-Qura University, P.O. Box 5555, Makkah 21955, Saudi Arabia 2 Faculty of Science, Tanta University, P.O. Box 31527, Tanta, Egypt 3 Mathematics Department, Faculty of Girls Education and Science, Taif University, Al-Khurmah Branch, P.O. Box 888, Taif 21974, Saudi Arabia 4 Electricity Department, Faculty of Engineering, Umm Al-Qura Univers...

Strongly stable gyroscopic systems

Here, gyroscopic systems are time-invariant systems for which motions can be characterized by properties of a matrix pencil L(λ) = λ2I + λG − C, where GT = −G and C > 0. A strong stability condition is known which depends only on |G| (= (GT G)1/2 ≥ 0) and C. If a system with coefficients G0 and C satisfies this condition then all systems with the same C and with a G satisfying |G| ≥ |G0| are al...

Control of Rolling in Ships by Means of Active Fins Governed by a Fuzzy-Logic Controller

Means of Active Fins, " (reference [55]), by Liut et al., is based on the contents of this chapter. In this chapter, we extend many results of our neural-network-control research to fuzzy-logic control. To this end, we revisit the problem of roll reduction by means of active stabilizers discussed in Chapter 5. The hydrodynamics of the problem is the same as what was discussed in Chapter 2, but ...

Topological mechanics of gyroscopic metamaterials.

Topological mechanical metamaterials are artificial structures whose unusual properties are protected very much like their electronic and optical counterparts. Here, we present an experimental and theoretical study of an active metamaterial--composed of coupled gyroscopes on a lattice--that breaks time-reversal symmetry. The vibrational spectrum displays a sonic gap populated by topologically p...

[On the problem of preventing injuries on board ships of the fishing industry fleet].