Results 51 to 60 of about 1,536 (172)

Effect of engine torque fluctuations under different flight conditions on the torsional vibration response of helicopter power input chain [PDF]

Mechanical Sciences
Under varying flight conditions, helicopter turboshaft engines generate pronounced torque fluctuations that can intensify torsional vibration in the power input chain, accelerating fatigue damage of critical transmission components and threatening flight
H. Yue, C. Li, G. Bin, X. Liu, J. Li, A. Chen, Q. Li   +6 more
doaj   +1 more source

A Modeling Approach for the Effect of Battery Aging on the Performance of a Hybrid Electric Rotorcraft for Urban Air-Mobility

Aerospace, 2020
The interest in electric and hybrid electric power systems for aircraft and rotorcraft has been increasing significantly in recent years. However, advanced simulation tools still need to be developed to exploit the potentiality and address the complexity
Teresa Donateo, Antonio Ficarella
doaj   +1 more source

Algorithm for classification of technical state of fuel regulator in the space of operating process parameters

Авіаційно-космічна техніка та технологія, 2021
This article solves the problem of constructing an algorithm for classifying the technical state of the fuel regulator of a turboshaft engine of a helicopter in the parameter space of the regulator's working process and obtaining estimates of the state ...
Игорь Валериевич Оганян, Сергей Валериевич Епифанов   +1 more
doaj   +1 more source

Multi-variable control of the GE T700 engine using the LQG/LTR design methodology [PDF]

, 1986
"Proceeding American Control Conference, Seattle, WA, June 1986."Bibliography: p. 8.Research supported by General Electric Company. NASA Ames and Langley Research Centers grant NASA NAG2-297William H. Pfeil, Michael Athans, H.

core   +1 more source

STAND IMITATOR OF THE ENGINE AS A UNIVERSAL MEANS OF ENSURING THE DEVELOPMENT AND TESTING OF REGULATORS

Авіаційно-космічна техніка та технологія, 2020
There is described the work on the project, carried out at the enterprise Element JSC for the creation of aircraft gas turbine engine simulator stands, for the maintenance and testing of some digital regulators for helicopter and aircraft engines ...
Анна Григорьевна Буряченко, Дмитрий Сергеевич Бурунов, Вячеслав Михайлович Грудинкин, Андрей Олегович Таранишин   +3 more
doaj   +1 more source

Neural Network System for Predicting Anomalous Data in Applied Sensor Systems

Applied System Innovation
This article advances the research on the intelligent monitoring and control of helicopter turboshaft engines in onboard conditions. The proposed neural network system for anomaly prediction functions as a module within the helicopter turboshaft engine ...
Serhii Vladov, Victoria Vysotska, Valerii Sokurenko, Oleksandr Muzychuk, Mariia Nazarkevych, Vasyl Lytvyn   +5 more
doaj   +1 more source

Application of the Integral Energy Criterion and Neural Network Model for Helicopter Turboshaft Engines’ Vibration Characteristics Analysis

Energies
This article presents a vibration signal analysis method to diagnose helicopter turboshaft engine defects such as bearing imbalance and wear. The scientific novelty of the article lies in the development of a comprehensive approach to diagnosing ...
Serhii Vladov, Maryna Bulakh, Denys Baranovskyi, Eduard Kisiliuk, Victoria Vysotska, Maksym Romanov, Jan Czyżewski   +6 more
doaj   +1 more source

Thermodynamic Optimization and Energy-Exergy Analyses of the Turboshaft Helicopter Engine

International Journal of Thermodynamics
Energy demand is a critical contemporary concern, with significant implications for the future. While exploring renewable or sustainable energy sources offers potential solutions, optimizing energy consumption in existing power generation systems is also key.
Mehdi Siyahi, Hadi Siyahi, Mohsen Fallah, Zahra Mohammadi   +3 more
openaire   +2 more sources

Surface fatigue microcracks in turbocompressor blades of a turboshaft engine

Applied and Computational Mechanics
Rescue and military helicopters are sometimes exposed to extraordinary operating conditions. Such loading can cause non-standard fatigue defects with very specific types of failure.
Pavlas J., Růžička M., Slavík S.
doaj   +1 more source

Research requirements for development of regenerative engines for helicopters [PDF]

The improved specific fuel consumption of the regenerative engine was compared to a simple-cycle turboshaft engine. The performance improvement and fuel saving are obtained at the expense of increased engine weight, development and production costs, and ...
Semple, R. D.
core   +1 more source