Wyniki wyszukiwania - BazTech

1

Badanie wpływu mikroemulsji wodno-paliwowych na okres zwłoki samozapłonu w silniku o zapłonie samoczynnym

Lotko Wincenty, Longwic Rafał, Górska Milena

Przemysł Chemiczny

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2019

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T. 98, nr 6

924--927

PL

Przedstawiono wyniki badań dotyczących wpływu wody zdyspergowanej w mikroemulsji paliwowej na zmianę okresu jej samozapłonu. Określono wybrane właściwości fizyczno-chemiczne oleju napędowego (ON) oraz testowanych mikroemulsji zawierających 4 lub 8% mas. wody destylowanej. Paliwa te wykorzystano do zasilenia silnika badawczego firmy AVL. Wyniki potwierdziły, że obydwie testowane mikroemulsje wodno-paliwowe charakteryzowały się mniejszą skłonnością do samozapłonu niż ON.

EN

Gas oil and its aq. microemulsions (4 and 8% by mass) were tested as fuel in diesel engine. Both tested microemulsions had lower ability for self-ignition than the gas oil. Selected phys.-chem. properties of tested fuels were detd.

2

The order reduction and robust D-stability analysis of discrete uncertain time-delay systems by time-scale separation

Pan S.-T.

Control and Cybernetics

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2003

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Vol. 32, no 4

745-760

EN

In this paper, the robust D-stability problem for discrete uncertain multiple time-delay systems is examined on the basis of their such reduced-order models (the slow and fast subsystems), which are obtained by time-scale separation method. Under the condition that the slow and fast subsystems of the nominal system are both -D(a,r)-stable, a D-stability criterion for the slow and fast subsystem of the original uncertain system is first derived. A delay-dependent criterion in terms of spectral radius is then proposed to guarantee the robust D-stability of the original uncertain system subject to structured perturbations. Moreover, the criterion for the robust asymptotic stability of the system subject to structured perturbations can be obtained from the proposed robust D-stability criterion. A numerical example is provided to illustrate our main results.

3

D-stability for a class of discrete descriptor systems with multiple time delays

Pan S., Chen C., Hsieh J.

Control and Cybernetics

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2002

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Vol. 31, no 1

79-89

EN

In this paper, the research on discrete descriptor systems is extended to include discrete multiple time-delay descriptor systems. The impulse-free and D-stability problem for a class of discrete descriptor systems with multiple time delays is investigated. A delay-dependent criterion is first derived to guarantee that the system is proper. A delay-dependent stability criterion in terms of spectral radius is then presented to ensure the D-stability of the system. Furthermore, a delay-dependent criterion is proposed to guarantee that the system is nebular, impulse-free, and D-stable. Finally, a numerical example is provided to illustrate our main results.