Yang Liu

TL;DR: In this paper, a survey of underactuated mechanical systems (UMS) is presented, from its history to the state-of-the-art research on modelling, classification, control, and to some extent, provides some unique insights for bottleneck issues and future research directions.

TL;DR: In this paper, the model of a vibro-impact capsule system is studied to provide a fundamental understanding of its dynamics for potential medical and engineering applications, and a trade-off between the best progression and the energy consumption is required to optimize the system behaviour.

TL;DR: In this article, the dynamics of the vibro-impact system which consists of a capsule main body interacting with a harmonically driven internal mass in various environments is studied by four different friction models which take into account Coulomb friction, viscous damping, Stribeck effect, pre-sliding, and frictional memory.

TL;DR: In this article, the hidden dynamics of a class of two-dimensional maps inspired by the Henon map are studied. But the authors focus on three typical scenarios which may generate hidden dynamics, i.e., no fixed point, single fixed point and two fixed points.

TL;DR: In this article, a capsule system driven by a harmonic force applied to its inner mass is considered and four various friction models are employed to describe motion of the capsule in different environments taking into account Coulomb friction, viscous damping, Stribeck effect, pre-sliding, and frictional memory.