Comparison of analog and digital strategies for automatic vibration control of lightweight space structures

1991 ◽  
Author(s):  
Suk-Yoon Hong ◽  
Vasundara V. Varadan ◽  
Vijay K. Varadan
Keyword(s):  
Vibration Control ◽  
Space Structures

An Experimental Study of Tendon Vibration Control System for Flexible Space Structures

1991 ◽  
Author(s):  
Yoshisada Murotsu ◽  
Hiroshi Okubo ◽  
Kei Senda
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Vibration Control ◽  
Transfer Functions ◽  
Mimo Systems ◽  
Experimental System ◽  
Space Structures ◽  
Flexible Beam ◽  
Tendon Vibration ◽  
Large Space

Abstract The idea of a tendon vibration control system for a beam-like flexible space structure has been proposed. To verify the feasibility of the concept, an experimental tendon control system has been constructed for the vibration control of a flexible beam simulating Large Space Structures (LSS). This paper discusses modeling, identification, actuator disposition, and controller design for the experimental system. First, a mathematical model of the whole system of the beam and tendon actuator is developed through a finite element method (FEM). Second, to obtain an accurate mathematical model for designing a controller, unknown characteristic parameters are estimated by using an output error method. The validity of the proposed identification scheme is demonstrated by good agreement between the transfer functions of the experimental system and an identified model. Then, disposition of actuators is discussed by using the modal cost analysis. Finally, controllers are designed for SISO and MIMO systems. The feasibility of the proposed controller is verified through numerical simulation and hardware experiments.

Semi-active friction tendons for vibration control of space structures

2014 ◽  
Vol 333 (22) ◽  
pp. 5657-5679 ◽  
Author(s):  
Hernán Garrido ◽  
Oscar Curadelli ◽  
Daniel Ambrosini
Keyword(s):  
Vibration Control ◽  
Space Structures ◽  
Active Friction

Slewing Maneuvers and Vibration Control of Space Structures by Feedforward/Feedback Moment-Gyro Controls

1995 ◽  
Vol 117 (3) ◽  
pp. 343-351 ◽  
Author(s):  
Li-Farn Yang ◽  
M. M. Mikulas ◽  
K. C. Park ◽  
Renjeng Su
Keyword(s):  
Rigid Body ◽  
Vibration Control ◽  
Vibration Suppression ◽  
Body Motion ◽  
Space Structures ◽  
Rigid Body Dynamic ◽  
Control Approach ◽  
Saturation Constraints ◽  
Two Stages ◽  
The Given

This paper presents a momentgyro control approach to the maneuver and vibration suppression of a flexible truss arm undergoing a constant slewing motion. The overall slewing motion is triggered by a feedforward input, and a companion feedback controller is employed to augment the feedforward input and subsequently to control vibrations. The feedforward input for the given motion requirement is determined from the combined CMG (Control Momentum Gyro) devices and the desired rigid-body motion. The rigid-body dynamic model has enabled us to identify the attendant CMG momentum saturation constraints. The task for vibration control is carried out in two stages; first in the search of a suitable CMG placement along the beam span for various slewing maneuvers, and subsequently in the development of LQ control algorithms for CMG spin-stabilization. Both analytical and numerical results are presented to show the effectiveness of the present approach.

A Darwinian Approach to the Actuator Number and Placement Problem With Nonnegligible Actuator Mass

1991 ◽  
Author(s):  
David C. Zimmerman
Keyword(s):  
Genetic Algorithm ◽  
Genetic Programming ◽  
Vibration Control ◽  
Space Structures ◽  
Placement Problem ◽  
Flexible Space Structures ◽  
Number Problem ◽  
Placement Algorithm ◽  
Survival Of The Fittest

Abstract The problem of optimal actuator number and placement for the vibration control of large flexible space structures is addressed in this work. The inherent mass of the actuators is integrated in the number and placement algorithm. The algorithm utilizes concepts from genetic programming, which is loosely based on Darwin’s “survival of the fittest” theories. The paper develops the genetic algorithm in the context of the actuator number and placement problem. Examples are presented which demonstrate the genetic algorithm and the effect of actuator mass on the placement and number problem.

Intelligent Sensor Fault Detection of Vibration Control for Flexible Structures

1999 ◽  
Vol 11 (6) ◽  
pp. 524-530 ◽  
Author(s):  
Masahiro Isogai ◽  
◽  
Fumihito Arai ◽  
Toshio Fukuda ◽  
◽  
...  
Keyword(s):  
Fault Detection ◽  
Vibration Control ◽  
Inverse Dynamics ◽  
Fault Tolerant ◽  
Flexible Structures ◽  
Space Structures ◽  
Sensor Fault ◽  
Intelligent Sensor ◽  
Proposed Model ◽  
Sensor Fault Detection

Vibration control for flexible structures such as arms and space structures has been widely studied. We proposed model-based decentralized control for flexible structures by decoupling mode quantities of other links. If a failure occurs, control performance drops due to parameter error between the model and plant. We must consider device fault detection and controller reconfiguration. We propose a fault-tolerant system using inverse dynamics constructed by neural network for sensor fault detection and NN adaptive control for the actuator fault to reconfigure control to compensate for parameter changes due to actuator faults. The effectiveness of our proposal is shown through simulation.

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