The Effect of Propulsion System Parameters on Vertical Take-Off and Landing Performance of a Transport Aircraft

1964 ◽  
Author(s):  
Joseph M. Zabinsky
Keyword(s):  
Propulsion System ◽  
Transport Aircraft ◽  
System Parameters

scholarly journals Fingerprinting the ship propulsion system: low hanging fruit or mission impossible?

2018 ◽  
Author(s):  
A Vrijdag ◽  
Y Sang
Keyword(s):  
Transfer Functions ◽  
Full Scale ◽  
Propulsion System ◽  
Data Driven ◽  
Parameter Estimates ◽  
System Parameters ◽  
Ship Propulsion ◽  
Wide Range ◽  
System Input ◽  
Ship Operation

In this paper the concept of ship propulsion system “fingerprinting” is explored as an alternative for data driven models that require extensive measured datasets collected over long periods of ship operation. As a first exploratory step a model of a ship in bollard pull conditions is linearised and its transfer functions are determined. Subsequently limited experimental data, involving sinusoidal excitation of the system input at a wide range of frequencies, is used to determine the system parameters. The resulting parameter estimates compare well against previously determined values. Although the developed ideas are far from ready to be used on full scale, the authors believe that the approach is promising enough to be developed further towards full scale application. 

scholarly journals The NASA Quiet Engine Program

1972 ◽  
Author(s):  
J. J. Kramer ◽  
F. J. Montegani
Keyword(s):  
Noise Reduction ◽  
Long Range ◽  
Full Scale ◽  
Propulsion System ◽  
Long Range Transport ◽  
Noise Performance ◽  
Transport Aircraft ◽  
Range Transport

The NASA Quiet Engine Program will incorporate all available noise-reduction technology into a propulsion system suitable for subsonic civil transport aircraft. Full-scale experimental hardware is being built and tested primarily for noise performance. The program is in process, and component and engine tests to date indicate that it is possible to achieve or exceed noise reduction objectives of 15–20 PNdB below the levels of 707/DC-8 long-range transport aircraft.

scholarly journals Use of Genetic Programming for the Estimation of CODLAG Propulsion System Parameters

2021 ◽  
Vol 9 (6) ◽  
pp. 612
Author(s):  
Nikola Anđelić ◽  
Sandi Baressi Šegota ◽  
Ivan Lorencin ◽  
Igor Poljak ◽  
Vedran Mrzljak ◽  
...  
Keyword(s):  
Genetic Programming ◽  
Mean Absolute Error ◽  
Absolute Error ◽  
Propulsion System ◽  
System Parameters ◽  
Estimation Performance ◽  
Fuel Flow ◽  
Lower Estimation ◽  
Decay State ◽  
Ship Speed

In this paper, the publicly available dataset for the Combined Diesel-Electric and Gas (CODLAG) propulsion system was used to obtain symbolic expressions for estimation of fuel flow, ship speed, starboard propeller torque, port propeller torque, and total propeller torque using genetic programming (GP) algorithm. The dataset consists of 11,934 samples that were divided into training and testing portions in an 80:20 ratio. The training portion of the dataset which consisted of 9548 samples was used to train the GP algorithm to obtain symbolic expressions for estimation of fuel flow, ship speed, starboard propeller, port propeller, and total propeller torque, respectively. After the symbolic expressions were obtained the testing portion of the dataset which consisted of 2386 samples was used to measure estimation performance in terms of coefficient of correlation (R2) and Mean Absolute Error (MAE) metric, respectively. Based on the estimation performance in each case three best symbolic expressions were selected with and without decay state coefficients. From the conducted investigation, the highest R2 and lowest MAE values were achieved with symbolic expressions for the estimation of fuel flow, ship speed, starboard propeller torque, port propeller torque, and total propeller torque without decay state coefficients while symbolic expressions with decay state coefficients have slightly lower estimation performance.

scholarly journals Algorithm for selecting UAV’s electric propulsion system parameters based on flight route

2015 ◽  
Vol 0 (13) ◽  
pp. 98-110
Author(s):  
Дмитро Сергійович Іголкін ◽  
Олександр Миколайович Масько ◽  
Віталій Вікторович Сухов
Keyword(s):  
Electric Propulsion ◽  
Propulsion System ◽  
System Parameters ◽  
Electric Propulsion System ◽  
Flight Route

High Speed Propulsion System for UAQ4 Magnetic Levitating Train

2012 ◽  
Vol 721 ◽  
pp. 9-14 ◽  
Author(s):  
Gino D'Ovidio ◽  
Francesco Crisi
Keyword(s):  
Experimental Data ◽  
Direct Current ◽  
High Speed ◽  
Permanent Magnets ◽  
Propulsion System ◽  
Stepper Motor ◽  
System Parameters ◽  
Speed Up ◽  
Main Components ◽  
Real Scale

This paper presents the design of a novel high speed propulsion system for UAQ4 magnetic levitating train, the feasibility of which has been successfully tested and confirmed in laboratory. A direct-current linear stepper motor that uses permanent magnets distributed on the central beam of track as the stator and the direct current power supplied coils on-board the vehicle as the rotor is proposed and analyzed. The motor performances are evaluated by varying the system parameters by carrying out a finite element numerical model refined with experimental data. The main components of a real scale motor with speed up to 580 km/h for the UAQ4 train application is measured and discussed.

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