Search results for: J. Stanislawski

Items from 1 to 20 out of 70 results

article

A comparison of helicopter main rotor features due to stiffness of rotor blade-hub connection

J. Stanisławski

Prace Instytutu Lotnictwa > 2018 > Nr 1 (250) > 114--131

The paper presents results of simulation calculations concerning an influence of stiffness of blade-hub connection on rotor loads and blades deflections in hover, level flight and pull up maneuver. The three versions of rotor are considered with articulated, elastic and stiff connections of blades and hub. The blades with the same distributions of stiffness, mass and the same aerodynamic characteristics...

article

Simulation investigation of operational conditions of rotor for high-speed compound helicopter

J. Stanisławski

Journal of KONES > 2018 > Vol. 25, No. 1 > 363--370

The article presents results of simulations concerning possibilities of rotorcraft performance enhancements for compound helicopters with introduced additional wings and propellers. The simple model of helicopter including a point mass of fuselage and a rotor treated as a disk was used for calculations of helicopter flight equilibrium conditions. For the defined flight states, the more detailed model...

article

Performance requirements and simulation of rotor operation for high-mountain rescue helicopter

J. Stanisławski

Journal of KONES > 2018 > Vol. 25, No. 2 > 341--348

Simulation results concerning performance of helicopter suitable for high-mountain rescue operations are presented. Including operations in regions of the highest Himalaya Mountains, the possibility of hover ceiling out of ground effect (OGE) at 10,000 m above sea level is assumed. Demand of high ratio of developed lift to power required for hover leads to choice the coaxial rotor configuration as...

article

Simulation investigation of rotor loads and blade deformations in steady states and at boundaries of helicopter flight envelope

J. Stanisławski

Journal of KONES > 2017 > Vol. 24, No. 2 > 239--246

Results of calculation of the helicopter main rotor loads and deformations of rotor blades are presented. The simulations concern level flight states and cases of boundary flight envelope such as wind gust, dive recovery and pull-up manoeuvre. The calculations were performed for data of the three-bladed articulated rotor of light helicopter. The method of analysis assumes modelling the rotor blades...

article

Simulation investigation of aerodynamic effectiveness reduction of helicopter tail rotor

J. Stanisławski

Prace Instytutu Lotnictwa > 2016 > Nr 1 (242) > 36--56

Paper presents the results of the simulation tests concerning the performance of the tail rotor in the directional maneuver of the helicopter due to the flow changes of the tail rotor blades. The calculation model includes the yawing of the helicopter fuselage and motion of the tail rotor blades treated as the set of the deformable elastic axes with distributed lumped mass. The equations of motion...

article

A simulation analysis of behaviour of ship-borne helicopter main rotor due to ship motion

J. Stanisławski

Journal of KONES > 2016 > Vol. 23, No. 1 > 313--320

The paper presents a simulation method of analysis of the couplings between rotor blades motion and helicopter fuselage standing on ship deck at the phase of take-off or landing when whirling rotor generates thrust less than weight of the helicopter. The oscillating motion of the ship deck due to waves is considered. The physical model includes the helicopter fuselage treated as the stiff body supported...

article

Influence of rotor parameter changes on helicopter performance and the main rotor load level

J. Stanisławski

Prace Instytutu Lotnictwa > 2015 > Nr 1 (238) > 54--69

Paper presents the results of calculations revealing the influence of changes the main rotor significant parameters like number of blades and rotational speed on helicopter performance and on rotor loads. The level of noise for rotor operated in hover condition is estimated. The rotor loads are defined applying simulation program which includes model of deformable blade. A Runge-Kutta method is used...

article

Flight envelope of light helicopter with additional propulsion propeller

J. Stanisławski

Prace Instytutu Lotnictwa > 2015 > Nr 2 (239) > 53--71

The paper presents possibilities of changing a flight envelope of a light helicopter with an additional propeller. Using the propulsion propeller enables to reduce the power required for the main rotor driving in high speed flight conditions. The results of simulating calculations for the conventional helicopter and for the version with the additional propeller are compared. For calculations of the...

article

Experimental measurements and simulation calculations of loads in control system of helicopter rotor

J. Stanisławski

Prace Instytutu Lotnictwa > 2015 > Nr 1 (238) > 35--53

Paper presents measured data of ILX-27 helicopter test in hover condition compared to simulation calculations concerning loads of a rotor control system. Used computing program for rotor loads calculation comprises a model of rotor blade treated as a elastic axis with a set of lumped masses. The results of simulation calculations also include predicted level of rotor control system loads for some...

article

Pattern of helicopter rotor loads and blade deformations in some states of flight envelope

J. Stanisławski

Prace Instytutu Lotnictwa > 2015 > Nr 1 (238) > 70--90

Paper contains a calculated range of helicopter rotor loads and deformations of the rotor blades which can occur within the flight envelope in different states: hover, level flight, autorotation, pull-up. The rotor loads were determined by using a computer simulating program including the model of the deformable rotor blade. The equations of motion of the rotor blade were solved by applying Galerkin's...

article

Simulation of helicopter boundary maneuvers of obstacle avoidance with predicted control function

J. Stanisławski

Prace Instytutu Lotnictwa > 2015 > Nr 2 (239) > 72--94

Paper presents a simplified method of a simulation of a helicopter controlled flight applied in a program defining an execution of two versions of an obstacle avoidance maneuver, a vertical jump and a horizontal S-turn. Considering the operational limitations of a helicopter, the control function required for maneuver is determined in an iteration process. The flight path for an avoidance maneuver...

article

Testowanie działania elementów systemu antykolizyjnego śmigłowca

J. Stanisławski

Prace Instytutu Lotnictwa > 2013 > Nr 3-4 (230-231) > 62--92

Loty na małych wysokościach wymagają zwiększonej koncentracji załogi śmigłowca przy jednoczesnej kontroli parametrów lotu, nawigacji i obserwacji otoczenia. Zmniejszenie obciążenia załogi może być osiągnięte poprzez wprowadzenie pokładowego układu detekcji przeszkód i predykcji manewru wspomagającego działania pilota przy ocenie sytuacji. W skład proponowanego układu, może wchodzić: radarowy blok...

article

Detekcyjny system antykolizyjny śmigłowca z funkcją przewidywania manewru omijania przeszkód

J. Dziupiński, S. Popowski, J. Stanisławski

Prace Instytutu Lotnictwa > 2011 > Nr 10 (219) > 73-93

Przedstawiono strukturę układu antykolizyjnego mającego na celu wspomaganie działania pilota śmigłowca w warunkach lotów niskich przy omijaniu przeszkód terenowych. Opisano moduł radarowy wykrywający przeszkody oraz blok pomiarowy do rejestracji parametrów lotu śmigłowca. Zamieszczono wyniki symulacyjnego wyznaczania dystansu niezbędnego do wykonania manewru omijania przeszkody. W programie obliczeniowym...

article

Symulacyjne określanie parametrów przelotu śmigłowca ponad przeszkodą

J. Stanisławski

Prace Instytutu Lotnictwa > 2011 > Nr 10 (219) > 297-314

Zadania stawiane załogom śmigłowców często wymagają wykonywania lotów na małej wysokości. Duże prawdopodobieństwo napotykania przeszkód terenowych wpływa na podnoszenie poziomu ryzyka lotów w bliskości powierzchni terenu. Pokładowy układ wspomagania pilota wyznaczający w przyśpieszonej skali czasu dystans niezbędny do przeprowadzenia manewru przeskoku ponad przeszkodą może przyczynić się do zwiększenia...

article

Prediction of helicopter H-V zone and cueing the emergency maneuver after power loss

J. Stanisławski

Archive of Mechanical Engineering > 2010 > Vol. LVII, nr 1 > 21-44

The paper presents the results of simulation method for prediction of helicopter H-V zone envelope, in the case of engine power loss. Depending on the loss rate of available power, the emergency maneuver for flight continuation is calculated, or the autorotation landing is predicted. The realization of an airborne device with in-built calculating procedure and graphic presentation of H-V zone predicted...

article

Wettability improvement of carbon ceramic materials by mono and multi energy plasma pulses

M. Barlak, J. Piekoszewski, Z. Werner, J. Stanislawski, more

Surface & Coatings Technology > 2009 > 203 > 17-18 > 2536-2540

Joining of carbon type ceramics with other materials presents an important challenge, especially in view of ITER technology. The crucial problem in joining is wettability of such ceramics with copper. In our previous works we succeeded in improving wettability using two-steps procedure, i.e.: pre-treatment of the ceramics surface with Ti ions implantation and/or deposition of metallic Ti using high...

article

Testowanie układu do predykcyjnego wyznaczania stref H-V z wykorzystaniem sterowanego modelu śmigłowca

J. Stanisławski

Prace Instytutu Lotnictwa > 2009 > Nr 6 (201) > 147-170

Opisano metodę wyznaczenia przebiegu sterowania śmigłowcem oraz tor jego lotu w czasie przeprowadzania manewru po awarii napędu. Porównano wyniki obliczeń symulacyjnych i zapisy z badań w locie rzeczywistego śmigłowca dotyczące lądowania po całkowitej awarii napędu. Podano obliczeniowe wyniki przeprowadzenia manewru awaryjnego pozwalające określić graniczne zapasy wysokości konieczne do bezpiecznego...

article

Symulacyjne określenie obciążeń wirnika nośnego śmigłowca z indywidualnym sterowaniem kąta nastawienia łopat w warunkach lotu ustalonego

J. Stanisławski

Prace Instytutu Lotnictwa > 2009 > Nr 6 (201) > 132-146

Przedstawiono wyniki obliczeń symulacyjnych zmian obciążeń wirnika śmigłowca w locie ustalonym dla przypadku wprowadzenia dodatkowego indywidualnego sterowania kątem nastawienia łopat.

article

Simulation investigation of tail rotor behavior in directional maneuver of helicopter

J. Stanisławski

Prace Instytutu Lotnictwa > 2008 > Nr 2(193) > 32-80

The paper presents the simulation method for calculating the tail rotor loads and bldes deflections in directional maneuver of helicopter. The simplifed equation of yawing motion of helicopter was applid. The physical model consists of helicopter fuselage treated as stiffness body and tail rotor with blades modeled by elastic axes with distributed lumped masses. The rough control input of the tail...

article

Magnetically Modulated Microwave Absorption Study of Superconducting MgB₂ Regions

L. Piekara-Sady, W. Jurga, W. Kempiński, Sz. Łoś, more

Applied Magnetic Resonance > 2008 > 34 > 1-2 > 157-162

. Experiments on thin MgB₂ films synthesized by ion implantation followed by hydrogen-plasma pulse treatment or annealing the sample at a given temperature in a furnace were undertaken. Superconducting properties were examined by magnetically modulated microwave absorption (MMMA) measurements. MMMA was measured as a function of temperature and external magnetic field in differently prepared MgB₂ samples...

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INFONA - science communication portal

Search results for: J. Stanislawski

A comparison of helicopter main rotor features due to stiffness of rotor blade-hub connection

Simulation investigation of operational conditions of rotor for high-speed compound helicopter

Performance requirements and simulation of rotor operation for high-mountain rescue helicopter

Simulation investigation of rotor loads and blade deformations in steady states and at boundaries of helicopter flight envelope

Simulation investigation of aerodynamic effectiveness reduction of helicopter tail rotor

A simulation analysis of behaviour of ship-borne helicopter main rotor due to ship motion

Influence of rotor parameter changes on helicopter performance and the main rotor load level

Flight envelope of light helicopter with additional propulsion propeller

Experimental measurements and simulation calculations of loads in control system of helicopter rotor

Pattern of helicopter rotor loads and blade deformations in some states of flight envelope

Simulation of helicopter boundary maneuvers of obstacle avoidance with predicted control function

Testowanie działania elementów systemu antykolizyjnego śmigłowca

Detekcyjny system antykolizyjny śmigłowca z funkcją przewidywania manewru omijania przeszkód

Symulacyjne określanie parametrów przelotu śmigłowca ponad przeszkodą

Prediction of helicopter H-V zone and cueing the emergency maneuver after power loss

Wettability improvement of carbon ceramic materials by mono and multi energy plasma pulses

Testowanie układu do predykcyjnego wyznaczania stref H-V z wykorzystaniem sterowanego modelu śmigłowca

Symulacyjne określenie obciążeń wirnika nośnego śmigłowca z indywidualnym sterowaniem kąta nastawienia łopat w warunkach lotu ustalonego

Simulation investigation of tail rotor behavior in directional maneuver of helicopter

Magnetically Modulated Microwave Absorption Study of Superconducting MgB₂ Regions

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