A comparison of active vibration control techniques - Output feedback vs optimal control

Martinovic, Zoran N.; Haftka, Raphael T.; Hallauer, W. L.; Schamel, George C.

doi:10.2514/6.1987-904

Cited by 2 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…:'vlany of the actuating methods discussed above have been tested in other experiments and simulations in the literature for the purpose of studying the growing number of control schemes. The various control laws which have been studied using the actuators described here include adaptive control (18), direct velocity feedback (11,19), classical control with compensators (20), suboptimal feedback (21), and optimal control (22). A linear quadratic regulator optimal control law is used throughout this paper.…”

Section: Literature Reviewmentioning

confidence: 99%

A planar comparison of actuators for vibration control of flexible structures

Clark

Robertshaw

Warrington

1989

30th Structures, Structural Dynamics and Materials Conference

View full text Add to dashboard Cite

Mechanical Engineering (ABSTRACT)Interest in large flexible space structures has grown considerably over the last decade.These distributed parameter systems exhibit vibration characteristics such as low, closely spaced natural frequencies and light damping, which, when coupled with the stringent pointing accuracy and vibration control requirements imposed on these systems, bring about interesting control problems. Addressing these problems has called for the use of active vibration control.Up to now, two of the most popular means for active vibration control of large space structures have been proof mass and reaction wheel actuators. These actuators are inertial-type actuators in that they operate by applying forces or moments to masses whose reaction forces, imposed on the structure, act to damp the vibrations of the structure. A new class of actuators, variable geometry trusses (VGT's), has been recently introduced. These actuators are actually built into the structure, and they operate by varying their link lengths to apply forces to the structure or to change the shape of the structure itself.This study compared the effectiveness of four actuators in controlling the planar vibrations of a cantilevered truss-beam. The actuators chosen for the study were a proof mass actuator, a reaction wheel actuator, and two VGT's, the planar truss actuator, and the planar truss proof mass actuator (a combination VGT/inertial type actuator).Numerical simulations of each beam/actuator system were performed in response to initial condition inputs. A full-state, LQR optimal feedback control law was used with each system. These simulations provided information such as time response of the closed-loop system, damping provided to the beam, and power required by each actuator. This information can be used to detennine the "best" actuator for a given purpose.The results of these simulations show that the VGT's are preferable in tenns of damping added to the beam. The proof mass actuator is more efficient as far as power required to do the control, however the efficiencies for all actuators are very similar. In this paper, a description of the beam model will be discussed, as well as descriptions of each of the actuator models. A brief discussion of the basis used for comparing the actuators will follow. The simulation results will be provided as well as a discussion of their value. Acknowledgements

show abstract

Section: Literature Reviewmentioning

confidence: 99%

A planar comparison of actuators for vibration control of flexible structures

Clark

Robertshaw

Warrington

1989

30th Structures, Structural Dynamics and Materials Conference

View full text Add to dashboard Cite

show abstract

“…The approaches to resolving the problem are nearly as numerous as the investigators who have addressed it [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. But as yet, a general procedure to determine the placement of actuators and corresponding command forces for each actuator has not been developed.…”

Section: Introductionmentioning

confidence: 99%

Controlling a large flexible structure to mimic a rigid one

Lin¹

1992

33rd Structures, Structural Dynamics and Materials Conference

View full text Add to dashboard Cite

A comparison of active vibration control techniques - Output feedback vs optimal control

Cited by 2 publications

References 6 publications

A planar comparison of actuators for vibration control of flexible structures

A planar comparison of actuators for vibration control of flexible structures

Controlling a large flexible structure to mimic a rigid one

Contact Info

Product

Resources

About