Vibration mitigation of a model aircraft with high-aspect-ratio wings using two-dimensional nonlinear vibration absorbers

JD Brown, M Mustafa, KJ Moore - International Journal of Non-Linear …, 2024 - Elsevier
Abstract High-aspect-ratio (HAR) airplane wings have higher energy efficiency and present
an economical alternative to standard airplane wings. HAR wings have a high span and a …

A two-dimensional nonlinear vibration absorber using elliptical impacts and sliding

C Wang, JD Brown, A Singh, KJ Moore - Mechanical Systems and Signal …, 2023 - Elsevier
Highly flexible structures often exhibit multiple low-frequency modes of vibration in multiple
directions that vibrate with relatively high amplitudes. As a result, new two-dimensional …

Minor change, major gains: the effect of orientation formulation on solving time for multi-body trajectory optimization

A Knemeyer, S Shield, A Patel - IEEE Robotics and Automation …, 2020 - ieeexplore.ieee.org
Many different coordinate formulations have been established to describe the position of
multi-body robot models, but the impact of this choice on the tractability of trajectory …

Minor Change, Major Gains II: Are Maximal Coordinates the Fastest Choice for Trajectory Optimization?

S Shield, A Patel - 2022 IEEE/RSJ International Conference on …, 2022 - ieeexplore.ieee.org
It has been shown that changing the coordinates describing a multi-body system to use
absolute rather than relative angles produces a significant improvement in the tractability of …

Forces associated with non-linear non-holonomic constraint equations

CM Roithmayr, DH Hodges - International Journal of Non-Linear …, 2010 - Elsevier
A concise method has been formulated for identifying a set of forces needed to constrain the
behavior of a mechanical system, modeled as a set of particles and rigid bodies, when it is …

Bond-graph representation of ideal constraints via the principle of virtual power

JR Phillips, F Amirouche - Multibody System Dynamics, 2024 - Springer
In this paper we develop bond-graph representations for ideal mechanical constraints, both
embedded and adjoined, by stating and applying the principle of virtual power, at the …

A contact-implicit direct trajectory optimization scheme for the study of legged maneuverability

S Shield - 2022 - open.uct.ac.za
For legged robots to move safely in unpredictable environments, they need to be
manoeuvrable, but transient motions such as acceleration, deceleration and turning have …

An argument against augmenting the Lagrangean for nonholonomic systems

CM Roithmayr, DH Hodges - 2009 - asmedigitalcollection.asme.org
Although it is known that correct dynamical equations of motion for a nonholonomic system
cannot be obtained from a Lagrangean that has been augmented with a sum of the …

Optimal Control of the Cheetah During Rapid Manoeuvres

A Knemeyer - 2022 - open.uct.ac.za
Cheetahs are incredibly fast, manoeuvrable and highly dynamic, but relatively little is
understood about how this is achieved. Thus, understanding their abilities is a subject of …

[PDF][PDF] Simplification of Differential Algebraic Equations by the Projection Method.

E Shmoylova, J Gerhard, E Postman, A Roche - EOOLT, 2013 - ep.liu.se
Reduction of a differential algebraic equation (DAE) system to an ordinary differential
equation system (ODE) is an important step in solving the DAE numerically. When the ODE …