An Analysis of a Self-Balancing System for Rigid Rotors

1975 ◽  
Vol 17 (4) ◽  
pp. 186-189 ◽  
Author(s):  
R. S. Sharp
Keyword(s):  
Stability Analysis ◽  
Parametric Study ◽  
Rigid Rotors

A stability analysis of the balanced condition of a two-ball balancer for a plane rotor is presented, and the results of a parametric study of the system are included. Conclusions are drawn regarding the satisfactory operation of the balancer.

Lateral Stability Analysis for Car-Trailer Combinations

2016 ◽  
Author(s):  
Eungkil Lee ◽  
Tao Sun ◽  
Yuping He
Keyword(s):  
Stability Analysis ◽  
Linear Stability ◽  
Linear Stability Analysis ◽  
Parametric Study ◽  
Degrees Of Freedom ◽  
Linear Quadratic Regulator ◽  
Lateral Stability ◽  
Linear Quadratic ◽  
Lqr Control ◽  
Ct System

This paper presents a parametric study of linear lateral stability of a car-trailer (CT) combination in order to examine the fidelity, complexity, and applicability for control algorithm development for CT systems. Using MATLAB software, a linear yaw-roll model with 5 degrees of freedom (DOF) is developed to represent the CT combination. In the case of linear stability analysis, a parametric study was carried out using eigenvalue analysis based on a linear yaw-roll CT model with varying parameters. Built upon the linear stability analysis, an active trailer differential braking (ATDB) controller was designed for the CT system using the linear quadratic regulator (LQR) technique. The simulation study presented in this paper shows the effectiveness of the proposed LQR control design and the influence of different trailer parameters.

Stability analysis of rigid rotors supported by gas foil bearings coupled with electromagnetic actuators

2019 ◽  
Vol 234 (2) ◽  
pp. 427-443 ◽  
Author(s):  
Kamal Kumar Basumatary ◽  
Gaurav Kumar ◽  
Karuna Kalita ◽  
Sashindra K Kakoty
Keyword(s):  
Stability Analysis ◽  
Equations Of Motion ◽  
Electromagnetic Actuator ◽  
Electromagnetic Actuators ◽  
Foil Bearings ◽  
Damping Characteristics ◽  
Foil Bearing ◽  
Model Combining ◽  
The Stability ◽  
Rigid Rotors

Rotors supported on gas foil bearings have low damping characteristics, which limits its application. A possible solution could be an integration of a gas foil bearing with an electromagnetic actuator. This paper discusses the effect of electromagnetic actuators on the stability of a rotor supported on gas foil bearings. A coupled dynamic model combining the dynamics of gas foil bearing and electromagnetic actuator has been developed. The fluid film forces from the gas foil bearings and the electromagnetic forces from the electromagnetic actuators are integrated into the equations of motion of the rotor. The sub-synchronous vibration present in case of conventional gas foil bearings is reduced and the stability band of the rotor is increased due to the implementation of electromagnetic actuator.

Parametric Study of the Imbalance Response of a Squeeze Film Damper

2008 ◽  
Author(s):  
Changhu Xing ◽  
Minel J. Braun ◽  
Hongmin Li
Keyword(s):  
Numerical Simulation ◽  
Stability Analysis ◽  
Direct Numerical Simulation ◽  
Parametric Study ◽  
Squeeze Film ◽  
Rigid Rotor ◽  
Squeeze Film Damper ◽  
Rotor Bearing ◽  
Parametric Studies ◽  
Spring Support

Rigid rotor models are widely used for the rotor-bearing stability analysis. This paper presents parametric studies for a squeeze film damper (SFD) using as parameters pressurization, the retainer spring support, and viscosity under the 2π- and π-film assumptions. The results are then validated by direct numerical simulation of the journal orbit.

Parametric Study During the Stability Analysis of an Aerostat

2010 ◽  
Author(s):  
A. Ghosh ◽  
Rakesh Kumar ◽  
Ajit Kumar ◽  
Balraj Gupta ◽  
Shashank Srivastava
Keyword(s):  
Stability Analysis ◽  
Parametric Study ◽  
The Stability

An Analysis of a New Type of Automatic Balancer

1977 ◽  
Vol 19 (5) ◽  
pp. 221-226 ◽  
Author(s):  
M. T. Hedaya ◽  
R. S. Sharp
Keyword(s):  
Stability Analysis ◽  
Parametric Study ◽  
New Type ◽  
Inertia Forces

A new type of automatic balancer which consists of a pair of two-ball balancers to compensate for unbalanced inertia forces and moments is presented. A stability analysis of the balanced condition achievable by such a balancer and the results of a parametric study of its stability are included. Conclusions are drawn regarding the satisfactory operation of the balancer.

Stability analysis and parametric study of pre-stressed stayed columns

2002 ◽  
Vol 24 (1) ◽  
pp. 115-124 ◽  
Author(s):  
Siu-Lai Chan ◽  
Gan-ping Shu ◽  
Zhi-tao Lü
Keyword(s):  
Stability Analysis ◽  
Parametric Study
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