Hybrid active suspension system of a helicopter main gearbox

Rodríguez, Jonathan; Cranga, Paul; Chesné, Simon; Gaudiller, Luc

doi:10.1177/1077546316655707

Cited by 12 publications

(11 citation statements)

References 2 publications

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“…In [83,84] an active suspension system is developed to enhance the performances of the dynamic antiresonant vibration absorber traditionally employed in helicopters [85]. In particular, the main advantage of the passive absorber combined with an active part is the power reduction.…”

Section: Antiresonance Assignment In Helicoptersmentioning

confidence: 99%

Active Approaches to Vibration Absorption through Antiresonance Assignment: A Comparative Study

Richiedei

Tamellin

2021

Applied Sciences

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Vibration absorption is a core research topic in structural dynamics and the mechanics of machines, and antiresonance assignment is an effective solution to such a problem in the presence of harmonic excitation forces. Due to recent developments in the theory of feedback control systems, the use of active control approaches to antiresonance assignment has been recently gaining more attention in the literature. Therefore, several methods exploiting state feedback or output feedback have been proposed in recent years. These techniques that just rely on servo-controlled actuators are becoming an interesting alternative to active approaches that emulate the well-known Tuned Mass Damper in an active (or semi-active) framework. This paper reviews and compares the most important approaches, with a greater focus on the methods exploiting the concept of control theory without adding new degrees of freedom in the system. The theoretical results, with the underlying theory, are discussed to highlight the key features of each assignment techniques. Several numerical examples where different techniques are applied and compared, also providing some analysis usually neglected in the literature, enrich the paper and demonstrate the key concepts.

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Section: Antiresonance Assignment In Helicoptersmentioning

confidence: 99%

Active Approaches to Vibration Absorption through Antiresonance Assignment: A Comparative Study

Richiedei

Tamellin

2021

Applied Sciences

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“…Semi-active control has been favored by researchers in recent years for its advantages of low power consumption, high reliability, and comparable to active control. Based on SARIB, Rodriguez et al (2018) controlled the relative rotational movement of the flapper arm with a voice coil actuator, and feedforward filtered-x least mean square control were applied to create a semi-active suspension with larger bandwidth efficiency, which were successfully achieved by simulations and experiments. Scheidler et al (2016) designed a magnetostrictive spring with dynamically adjustable rigidity, which can change the natural frequency to adapt to the change of source frequency.…”

Section: Introductionmentioning

confidence: 99%

Design and control of helicopter main reducer semi-active vibration isolation system based on MR damper

Wang

Zhou

Cao

et al. 2023

Journal of Intelligent Material Systems and Structures

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In order to effectively reduce the vibration of the helicopter rotor transmitted from the main reducer to the fuselage, a semi-active vibration isolation system (SAVIS) with a magnetorheological (MR) damper was proposed and effective control strategies were designed. Firstly, the structural scheme and working principle of helicopter main reducer SAVIS were proposed. Secondly, the mechanical properties of the MR damper were tested, and the dynamic model of the MR damper was established based on the hyperbolic tangent model. In addition, the model errors of MR damper were analyzed and quantified. Thirdly, according to the design requirements and parameters of a helicopter, the structural parameters of SAVIS were designed. Then, the virtual prototype of helicopter main reducer SAVIS was established by using 3D drawing software and ADAMS software, and the vibration characteristics of three directions were analyzed. Finally, two controllers of equivalent skyhook and continuous skyhook were designed. The numerical analysis results indicate that compared with passive vibration isolation and equivalent skyhook controller, the continuous skyhook controller has the best vibration isolation performance and disturbance resistance, which can effectively reduce the vibration transmitted from helicopter rotor to fuselage.

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“…the damper will work as a tuned mass damper when the controller is turned off [29]. Systems have been proposed such as an HMD with H∞ optimum parameters to minimize both response and control effort [30], a fail-safe system [31], a dual loop approach to increase stability margins [32], an FXLMS controller with a resonant isolation system (SARIB) for helicopter applications [33], delay resonators [34], a tunable vibration absorber [35], an adaptive inertial mass device [36] and an hyperstable HMD [25,37].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Mass Damper: Theoretical and Experimental Power Flow Analysis

Billon

Zhao²,

Collette

et al. 2022

Journal of Vibration and Acoustics

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In this paper, a hybrid mass damper (HMD) and its hyperstability thanks to a power flow approach are studied. The HMD proposed combines an active control system with an optimal passive device. The initial passive system is an electromagnetic Tuned Mass Damper (TMD) and the control law is a modified velocity feedback with a phase compensator. The resulting hybrid controller system is theoretically hyperstable and ensures fail-safe behavior. Experiments are performed to validate the numerical simulation and provide good results in terms of vibration attenuations. Both excitation from the bottom in the frequency domain and shock response in the time domain are tested and analyzed. The different power flows in terms of active and reactive powers are estimated numerically and experimentally on the inertial damper (passive and active) and on the HMD. More over, through a mechanical analogy of the proposed system, it is shown that this hybrid device can be seen as an active realization of an inerter based tuned-mass-damper associated with a sky-hook damper. Observations and analysis provide insight into the hyperstable behavior imposed by the specific control law.

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Hybrid active suspension system of a helicopter main gearbox

Cited by 12 publications

References 2 publications

Active Approaches to Vibration Absorption through Antiresonance Assignment: A Comparative Study

Active Approaches to Vibration Absorption through Antiresonance Assignment: A Comparative Study

Design and control of helicopter main reducer semi-active vibration isolation system based on MR damper

Hybrid Mass Damper: Theoretical and Experimental Power Flow Analysis

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