Improved method of analyzing takeoff/landing performance of turboprop aircraft through modeling and simulation

Kim, Myung; Kim, Ji

doi:10.2514/6.2001-4072

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…Ref. [48] proposed the development of a simulation model for a small aircraft, which showed good agreement with their available flight test data. Ref.…”

Section: State Of the Art Of Take-off Simulation Methodsmentioning

confidence: 82%

A Simulation Framework for Aircraft Take-Off Considering Ground Effect Aerodynamics in Conceptual Design

et al. 2023

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The development of novel aircraft concepts and propulsion technologies requires up-to-date physics-based methods and tools for conceptual aircraft design. In this context, a simulation model for the take-off manoeuvre is proposed in this article, to be employed in the conceptual design phase for aircraft whether of traditional or innovative configuration. The model is capable of evaluating the longitudinal dynamics, both translational and rotational, of the aircraft considered as a rigid body, and influenced by the aerodynamic effects introduced by the presence of the ground. The ground effect, indeed, induces variations in the aerodynamic forces depending on the distance and the attitude of the lifting surfaces from the ground, which may significantly influence the aeromechanical characteristics of the aircraft during the evolution of the take-off manoeuvre. The simulation model is based on the numerical solution of the equations of the dynamics of the rigid aircraft in the longitudinal plane and integrates a vortex lattice aerodynamic solver to evaluate the aerodynamic and aeromechanical characteristics of the aircraft considering the ground effect in each time-step. The proposed approach is configuration independent, as it can model the geometry, evaluate the aerodynamics, and simulate the dynamics of aircraft with any lifting architecture; furthermore, the simulation model is fast and flexible, making it effective for the conceptual phase of aircraft design. The paper proposes the description of the take-off manoeuvre of two aircraft with different airframes: one with a conventional tube-and-wing architecture and one with a box-wing lifting system. The results proposed highlight the potential of the simulation model to detect aeromechanic and dynamic differences during the development of the manoeuvre for different aircraft configurations, and to assess the significance of considering ground effect aerodynamics.

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“…Ref. [48] proposed the development of a simulation model for a small aircraft, which showed good agreement with their available flight test data. Ref.…”

Section: State Of the Art Of Take-off Simulation Methodsmentioning

confidence: 82%

A Simulation Framework for Aircraft Take-Off Considering Ground Effect Aerodynamics in Conceptual Design

et al. 2023

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“…A number of methods have been proposed for takeoff modeling. Past studies have focused on takeoff analysis for aircraft sizing and performance analysis [4][5][6][7], takeoff trajectory prediction for aircraft operational level analysis [8,9], takeoff dynamics modeling [10][11][12][13], one-engine-out lateral path strategy [14,15], and lateral controllability at CEI [16,17]. Limitations in preceding research include: 1.…”

Section: Introductionmentioning

confidence: 99%

Differential Dynamic Programming to Critical-Engine-Inoperative Takeoff Certification Analysis

Xie

Harrison

Mavris

2020

Aiaa Aviation 2020 Forum

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Critical-engine-inoperative (CEI) takeoff is a required flight test in transport aircraft type certification. Due to the limited excess power following engine failure, this flight test is potentially dangerous and highly sensitive to the flight controls. To enhance the flight safety in CEI takeoff, an optimal longitudinal control sequence is necessary for the flight test. On the other hand, to reduce the cost associated with type certification process, it is desired to incorporate certification analysis in early design phases. Since the certification regulations pose requirements on aircraft dynamic responses, the point-mass based method used in most of the takeoff analyses for aircraft early design is not suitable. To incorporate flight dynamics in takeoff analysis, a robust longitudinal control law is needed for takeoff performance prediction. This paper proposes to use Differential Dynamic Programming (DDP) for the optimization of elevator control for CEI takeoff certification analysis. To evaluate the method, two test cases are performed on the CEI takeoff of a small single-aisle aircraft model with different initial conditions. The results of two cases suggests that the DDP algorithm is able to optimize the trajectory in terms of minimizing takeoff distance, maximizing the rate of climb, and improving the compliance with respect to takeoff certification constraints. The optimized trajectory is sensitive to the initial control sequence given to the algorithm and the cost function settings.

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“…Due to interactions between different parts of turboprops, the traditional take-off model is not suitable for turboprops. Few literatures are found discussing the integrated turboprop take-off model and most of them were based on measured data (Kim and Ji, 2013), which were costly and inadequate for detailed parameters research. The integrated model in this paper is based on the propeller model, the wing model and the propeller-wing interaction model.…”

Section: Introductionmentioning

confidence: 99%

Real-time integrated turboprop take-off model under propeller-wing interaction

Wang

Huang

2019

AEAT

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Purpose The purpose of the paper is to build a real-time integrated turboprop take-off model which fully takes the interaction between diverse parts of aircraft into consideration. Turboprops have the advantage of short take-off distance derived from propeller-wing interaction. Traditional turboprop take-off model is inappropriate because interactions between diverse parts of aircrafts are not fully considered or longer calculation time is required. To make full use of the advantage of short take-off distance, a real-time integrated take-off model is needed for analysing flight performance and developing an integrated propeller-engine-aircraft control system. Design/methodology/approach A new integrated three-degree-of-freedom take-off model is developed, which takes a modified propeller model, a wing model and the predominant propeller-wing interaction into account. The propeller model, based on strip theory, overcomes the shortage that the strip theory does not work if the angle of propeller axis and inflow velocity is non-zero. The wing model uses the lifting line method. The proposed propeller-wing interaction model simplifies the complex propeller-wing flow field. Simulations of ATR42 take-off model are conducted in the following three modes: propeller-wing interaction is ignored; influence of propeller on wing is considered only; and propeller-wing interaction is considered. Findings Comparison of take-off distances and flight parameters shows that propeller-wing interaction has a vital impact on take-off distance and flight parameters of turboprops. Practical implications The real-time integrated take-off model provides time-history flight parameters, which plays an important role in an integrated propeller-engine-aircraft control system to analyse and improve flight performance. Originality/value The real-time integrated take-off model is more precise because propeller-wing interaction is considered. Each calculation step costs less than 20 ms, which meets real-time calculation requirements. The modified propeller model overcomes the shortage of strip theory.

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Improved method of analyzing takeoff/landing performance of turboprop aircraft through modeling and simulation

Cited by 5 publications

References 1 publication

A Simulation Framework for Aircraft Take-Off Considering Ground Effect Aerodynamics in Conceptual Design

A Simulation Framework for Aircraft Take-Off Considering Ground Effect Aerodynamics in Conceptual Design

Differential Dynamic Programming to Critical-Engine-Inoperative Takeoff Certification Analysis

Real-time integrated turboprop take-off model under propeller-wing interaction

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