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Weispfenning, Thomas

doi:10.1023/a:1004212001768

Cited by 21 publications

(1 citation statement)

References 15 publications

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“…It is known that the health condition of the shock absorber impacts the handling capabilities of any ground vehicle [10]. Works from the automotive field such as [11] and [12] have pointed out the coupling between shock absorber stiffness, stability, and braking distances. Different studies have attempted to model shock absorber failure and variability in aircraft to analyze vertical dynamics [13], to propose anomaly detection schemes [2,14], or to analyze vibration phenomena [15].…”

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Shock Absorber Leakage Impact on Aircraft Lateral Stability During Ground Handling Maneuvers

Lopetegui

Papa

Morandini

et al. 2023

Journal of Guidance, Control, and Dynamics

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Aircraft braking maneuvers are safety-critical on-ground motions that exhibit complex dynamics and significant dependence on system operating conditions. The fundamental interface between the aircraft and the ground is the landing gear. Among the landing gear components, the shock absorbers may be subject to gas leakage during their lifetime, which is an anomaly that could compromise the lateral stability properties of the aircraft on the operating regimes found during braking maneuvers. In this paper, an explicit link is established between main landing gear shock absorber leakage and aircraft lateral stability. To investigate lateral stability, a high-fidelity multibody nonlinear aircraft simulator is developed in a MATLAB/Simulink framework and validated against experimental data. To generate insight into the problem and to quantify shock absorber leakage impact on aircraft lateral stability, two simple but descriptive analytical models are also developed, each one on a different operating mode of the system. The analysis of the models reveals that shock absorber leakage can have a significant effect on aircraft lateral stability, especially at high velocities and highly damped nose wheel steering conditions. The models developed in this work may be used by aircraft control system designers to come up with more effective lateral stability controllers in the event of main landing gear shock absorber leakage.

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confidence: 99%

Shock Absorber Leakage Impact on Aircraft Lateral Stability During Ground Handling Maneuvers

Lopetegui

Papa

Morandini

et al. 2023

Journal of Guidance, Control, and Dynamics

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A Simultaneous Mixed LQR/H_∞ Control Approach to the Design of Reliable Active Suspension Controllers

2014

Asian Journal of Control

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This paper is concerned with the synthesis of reliable controllers for quarter‐car active suspension systems. By a simultaneous mixed LQR/H∞ control approach, a static output feedback controller is derived for guaranteeing good suspension performance under possible sensor fault or suspension component breakdown. The considered simultaneous mixed LQR/H∞ control problem is a nonconvex optimization problem; therefore, the linear matrix inequality approach is not applicable. Based on the barrier method, we solve an auxiliary minimization problem to get an approximate solution for the simultaneous mixed LQR/H∞ control problem. Necessary conditions for the local optimum of the auxiliary minimization problem are derived. Moreover, a three‐stage solution algorithm is developed for solving the auxiliary minimization problem. The simulation shows that the obtained static output feedback suspension controllers can improve suspension performance in nominal mode and all considered failure modes.

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Fault detection and diagnosis of an automotive suspension and the tire pressures

Isermann

2006

Fault-Diagnosis Systems

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Untitled

Cited by 21 publications

References 15 publications

Shock Absorber Leakage Impact on Aircraft Lateral Stability During Ground Handling Maneuvers

Shock Absorber Leakage Impact on Aircraft Lateral Stability During Ground Handling Maneuvers

A Simultaneous Mixed LQR/H_∞ Control Approach to the Design of Reliable Active Suspension Controllers

Fault detection and diagnosis of an automotive suspension and the tire pressures

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Untitled

Cited by 21 publications

References 15 publications

Shock Absorber Leakage Impact on Aircraft Lateral Stability During Ground Handling Maneuvers

Shock Absorber Leakage Impact on Aircraft Lateral Stability During Ground Handling Maneuvers

A Simultaneous Mixed LQR/H∞ Control Approach to the Design of Reliable Active Suspension Controllers

Fault detection and diagnosis of an automotive suspension and the tire pressures

Contact Info

Product

Resources

About

A Simultaneous Mixed LQR/H_∞ Control Approach to the Design of Reliable Active Suspension Controllers