Controlled motion of a two-module vibration-driven system induced by internal acceleration-controlled masses |
| |
Authors: | Hong-Bin Fang Jian Xu |
| |
Institution: | (1) Technical Mechanics Department, Faculty of Mechanical Engineering, TU Illmenau, Illmenau, Germany;(2) Institute for Problems in Mechanics of the Russian Academy of Sciences, Moscow, Russia;(3) Kursk State Technical University, Kursk, Russia; |
| |
Abstract: | The rectilinear motion of a vibration-driven mechanical system composed of two identical modules connected by an elastic element
is considered in this paper. Each module consists of a main body and an internal mass that can move inside the main body.
Anisotropic linear resistance is assumed to act between each module and the resistant medium. The motion of the system is
excited by two acceleration-controlled masses inside the respective main bodies. The primary resonance situation that the
excitation frequency is close to the natural frequency of the system is considered, and the steady-state motion of the system
as a whole is mainly investigated. Both the internal excitation force and the external resistance force contain non-smooth
factors and are assumed to be small quantities of the same order when compared with the maximum value of the force developed
in the elastic element during the motion. With this assumption, method of averaging can be employed and an approximate value
of the average steady-state velocity of the entire system is derived through a set of algebraic equations. The analytical
results show that the magnitude of the average steady-state velocity can be controlled by varying the time shift between the
excitations in the modules. The optimal value of the time shift that corresponds to the maximal average steady-state velocity
exists and is unchanging with the external coefficients of resistance. For a system with specific parameters, numerical simulations
are carried out to verify the correctness of the analytical results. The optimal value of the time shift is numerically obtained,
and the optimal situation is studied to show the advantages of the control. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|