Topic
Inertia
About: Inertia is a research topic. Over the lifetime, 12006 publications have been published within this topic receiving 164291 citations.
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TL;DR: In this paper, a human body inspired passive vibration isolation system with a special coupled nonlinear inertia design is presented, which can improve the vibration isolation at low frequencies and/or in a broadband frequency range, irrespective of the loading and excitation conditions.
51 citations
12 May 1992
TL;DR: In this article, an adaptive control of a space robot system with an attitude-controlled base on which the robot is attached is proposed, where most tasks are specified in inertia space, instead of joint space, and two potential problems, unavailability of the joint trajectory (since mapping from inertia space trajectory is dynamics-dependent and subject to uncertainty), and nonlinear parameterization in inertia spaces are identified.
Abstract: The authors discuss adaptive control of a space robot system with an attitude-controlled base on which the robot is attached. An adaptive control scheme in joint space is proposed. Since most tasks are specified in inertia space, instead of joint space, the authors discuss the issues associated to adaptive control in inertia space and identify two potential problems, unavailability of the joint trajectory (since mapping from inertia space trajectory is dynamics-dependent and subject to uncertainty), and nonlinear parameterization in inertia space. For a planar system, the linear parameterization problem is investigated, the design procedure of the controller is illustrated, and the validity and effectiveness of the proposed control scheme are demonstrated. >
51 citations
01 Jan 1984
TL;DR: In this article, a finite element model (FEM) for analysis of nonlinear vibrations in beam structures subjected to harmonic excitation is presented, which covers longitudinal deformation and inertial effects.
Abstract: Techniques for defining a finite element model (FEM) for analysis of nonlinear vibrations in beam structures subjected to harmonic excitation are presented. The resulting model covers longitudinal deformation and inertial effects. The nonlinear oscillations of a beam element under forced excitation are modeled by a harmonic force matrix based on first order approximations of the Jacobian elliptic forcing function. Harmonic force and nonlinear stiffness matrices are derived and the nonlinear forced responses of beams are calculated under various boundary conditions. The results of FEM computations for simply-supported and clamped beams show that midplane stretching caused by large deflections increases the nonlinearity. Axially-restrained beams experience only hardening nonlinearity, while axially-free beams have reduced nonlinearity in deformation and inertia and an increase in linearity due to large deflection.
51 citations
TL;DR: In this article, it is shown that inertia is a small perturbation of the equation governing the motion of fluid particles in an infinite, periodic, cellular flow field, which is sufficient to induce almost all particles to settle.
Abstract: This paper presents a proof that given a dilute concentration of aerosol particles in an infinite, periodic, cellular flow field, arbitrarily small inertial effects are sufficient to induce almost all particles to settle It is shown that when inertia is taken as a small parameter, the equations of particle motion admit a slow manifold that is globally attracting The proof proceeds by analyzing the motion on this slow manifold, wherein the flow is a small perturbation of the equation governing the motion of fluid particles The perturbation is supplied by the inertia, which here occurs as a regular parameter Further, it is shown that settling particles approach a finite number of attracting periodic paths The structure of the set of attracting paths, including the nature of possible bifurcations of these paths and the resulting stability changes, is examined via a symmetric one-dimensional map derived from the flow
51 citations
TL;DR: In this article, a gyro-mass damper (GMD) is used for vibration mitigation of motor vehicles and optical tables, and three different configurations are evaluated: (i) stand-alone GMD, (ii) GMD-brace system, and (iii) GA-Viscous damper-brace (GVB) system.
51 citations