Design of Sky-ground Hook Controller for MR Damper of Aircraft Landing Gear

Kang, Byung-Hyuk; Han, Chul Hee; Jeong, HongSeok

doi:10.5050/ksnve.2019.29.2.222

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…The landing efficiency data are summarized in Table 2. These data confirm that the efficiency is over 70% up to a rate of descent of 3 m/s when both the roll and pitch angles are 0°, since the damper model is designed to be suitable for the aircraft drop for 2-DOF model, in accordance with FAR part 23 regulations which has been considered as a fail-safe function in the previous work (Kang et al, 2019: 222–229). However, the strut force at the extension condition of the damper strut becomes 0 kN when the descent rate is 4 m/s.…”

Section: Control Of Landing Efficiencysupporting

confidence: 76%

“…As well known, the skyhook control logic minimizes the movement of the sprung mass of mechanical systems for the semi-active force generators such as MR dampers (Karnopp et al, 1974: 619–626). Therefore, it is typically applied to passenger cars, off-road vehicles, large vehicles, and aircraft, to improve ride comfort (Choi et al, 1998: 143–161, 2016: 043001; Kang et al, 2019: 222–229; Rao and Narayanan, 2009: 515–529). It is also used in evaluating impact control characteristic of the aircraft landing gear with MR damper (Lee et al, 2009: 012068; Luong et al, 2020: 1459).…”

Section: Introductionmentioning

confidence: 99%

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Landing efficiency control of a six degrees of freedom aircraft model with magneto-rheological dampers: Part 2—control simulation

Kang

Yoon

Kim

et al. 2020

Journal of Intelligent Material Systems and Structures

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In Part 1 of this work, both the kinematic and dynamic equations of aircraft landing model integrated with magneto-rheological damper were derived. In Part 2, the landing efficiency is analyzed through landing motion simulation which is performed on the basis of the model equations derived in Part 1. To investigate the landing efficiency with respect to the operating force control of magneto-rheological fluid, two different control logics for magneto-rheological damper are designed. The first one is the skyhook controller, which is known to be simple, but very effective for the semi-active control system. In this control logic, the switching condition depending on the compression and extension mode of the damper is determined to achieve maximum energy dissipation. The second one is a modified skyhook controller associated with the semi-active bouncing control. This controller is introduced to prevent bouncing of the main landing gear tires and to reduce the roll motion of the aircraft. The landing efficiency is evaluated at several rates of descent, and its distinct features such as tire displacement and pitch angle are compared in the time domain.

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Section: Control Of Landing Efficiencysupporting

confidence: 76%