Multibody simulation of a generalized predictive controller for tiltrotor active aeroelastic control

Mattaboni, Mattia; Masarati, Pierangelo; Mantegazza, Paolo

doi:10.1177/0954410011406203

Cited by 3 publications

(5 citation statements)

References 27 publications

(28 reference statements)

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“…This problem has been previously addressed, in analogy to what is done here, extracting the characteristics of the system from numerical experiments. In [31], the stability properties of a complete tiltrotor multibody model were computed using the previously mentioned POD-based approach [43].…”

Section: Poma Mode Shapesmentioning

confidence: 99%

Numerical Whirl–Flutter analysis of a tiltrotor semi-span wind tunnel model

et al. 2022

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This work presents the modeling and preliminary Whirl–Flutter stability results achieved within the Advanced Testbed for TILtrotor Aeroelastics (ATTILA) CleanSky2 project. The project addresses the design, manufacturing, and testing of a semi-span wind-tunnel model of the Next Generation Civil TiltRotor. The preliminary multibody models developed in support of the wind-tunnel testbed design are described, illustrating the modeling technique of each subcomponent of the model, namely the wing, the rotor, the blades, and the yoke. The methodologies used to analyze the stability of systems subjected to periodic aerodynamic excitation when the problem is modeled using full-featured multibody solvers are presented in support of Whirl–Flutter identification during wind-tunnel testing.

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Section: Poma Mode Shapesmentioning

confidence: 99%

Numerical Whirl–Flutter analysis of a tiltrotor semi-span wind tunnel model

et al. 2022

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“…The detailed control system kinematics and compliance were modeled. The overall multibody model consisted of more than 800 equations [7,8].…”

Section: Introductionmentioning

confidence: 99%

A Multibody Model of Tilt-Rotor Aircraft Based on Kane’s Method

et al. 2019

International Journal of Aerospace Engineering

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A tilt-rotor aircraft can switch between two flight configurations (the helicopter configuration and the fixed-wing plane configuration) by tilting its rotors. In the process of rotor tilting, the nacelles which drive the rotors tilt together with the rotors. Because the mass of the nacelles cannot be ignored compared to the mass of the whole aircraft, the tilting of the nacelles is a coupling motion of the body and the nacelles. In order to better character the aircraft dynamics during the nacelle tilting, a multibody model is established in this paper. In this multibody model, Kane’s method is used to build a dynamic model of a tilt-rotor aircraft. The generalized rates are used to describe the movement of the body and the nacelles (with rotors). The generalized active forces and generalized inertial forces of both the body and the nacelles (with rotors) are obtained, respectively, and the first-order differential equations of the generalized rates are obtained. The longitudinal trim of the XV-15 aircraft is calculated according to the single-body model and our multibody model, in this paper, and the results verify the correctness of the multibody model. In the process of nacelle inclination angle command tracking, the multibody model can provide more information about the disturbance torque of the nacelle than the single-body model, and model inversion control based on the proposed multibody model can obtain a better tracking result than a PID control method only using nacelle angle feedback information.

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“…free-play and backlash), as described by Nixon et al 11 as well as by Masarati et al 12 for the so-called WRATS tiltrotor test rig. Another difference between windmilling and thrust mode is the deformation of an elastic blade under thrust, resulting also in different trim conditions, as indicated by Mattaboni et al 13 Finally, the thrust vector is a so-called follower force leading to a non-conservative equation of motion resulting from the angular displacement of the rotor plane with respect to the wing. Thrust vector effects have been investigated for missiles, e.g.…”

Section: Introduction: Whirl Flutter For Tiltrotor Aircraft Backgroundmentioning

confidence: 99%

“…Even seemingly small parameter variations are found to have a large influence on the flutter boundary, an observation that is supported by the experience gained during the work discussed in this article. Flutter suppression by active control is the topic of the articles by Hathaway and Gandhi and, more recent, by Mattaboni et al 13…”

Section: Introduction: Whirl Flutter For Tiltrotor Aircraft Backgroundmentioning

confidence: 99%

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Multibody analysis of whirl flutter stability on a tiltrotor wind tunnel model

Krüger

2015

Proceedings of the Institution of Mechanical Engineers, Part K:

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Tiltrotor aircraft are equipped with large rotors, usually driven by heavy engines in nacelles located at the tip of the wings. This combination of large rotors and high masses on wings which form a relatively elastic support makes whirl flutter a critical phenomenon for the design of the aircraft and its performance. In this article, a multibody-based simulation model of a tiltrotor wind tunnel model is presented, combining a mixed finite element/multibody representation of the support, a detailed kinematic model of the rotor hub and a strip-wise definition of air loads on the blades. Investigations on the effect of parameter changes and non-linearities on the calculation of the aeroelastic stability boundary are executed. The selected operational points are taken from wind tunnel experiments performed by a consortium of partners in the course of the European ADYN project. The regarded wind tunnel model is a half model of a tiltrotor wing, simplified for the use in whirl flutter investigations. The rotor is four-bladed; the rotor hub is of a gimbal type. Structural dynamics properties of the model are known from detailed experimental investigations. Numerical analyses of the dynamic behaviour of the model are performed in the frequency and in the time domain. Results show considerable differences for linear and non-linear models. This paper describes the simulation approach, the model setup and the comparison of the data with selected experimental results.

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Multibody simulation of a generalized predictive controller for tiltrotor active aeroelastic control

Cited by 3 publications

References 27 publications

Numerical Whirl–Flutter analysis of a tiltrotor semi-span wind tunnel model

Numerical Whirl–Flutter analysis of a tiltrotor semi-span wind tunnel model

A Multibody Model of Tilt-Rotor Aircraft Based on Kane’s Method

Multibody analysis of whirl flutter stability on a tiltrotor wind tunnel model

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