Limits...
An improved force feedback control algorithm for active tendons.

Guo T, Liu Z, Cai L - Sensors (Basel) (2012)

Bottom Line: An active tendon, consisting of a displacement actuator and a co-located force sensor, has been adopted by many studies to suppress the vibration of large space flexible structures.The effectiveness of the algorithm is demonstrated on a structure similar to JPL-MPI.The results show that large damping can be achieved for the vibration control of large space structures.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China. gtn@bjut.com

ABSTRACT
An active tendon, consisting of a displacement actuator and a co-located force sensor, has been adopted by many studies to suppress the vibration of large space flexible structures. The damping, provided by the force feedback control algorithm in these studies, is small and can increase, especially for tendons with low axial stiffness. This study introduces an improved force feedback algorithm, which is based on the idea of velocity feedback. The algorithm provides a large damping ratio for space flexible structures and does not require a structure model. The effectiveness of the algorithm is demonstrated on a structure similar to JPL-MPI. The results show that large damping can be achieved for the vibration control of large space structures.

No MeSH data available.


Related in: MedlinePlus

Root locus with different Δkc/kc. (a) the first mode; (b) the second mode; (c) the third mode.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3472888&req=5

f8-sensors-12-11360: Root locus with different Δkc/kc. (a) the first mode; (b) the second mode; (c) the third mode.

Mentions: Because Δkc is important in the control algorithm, the control effectiveness is investigated when there is a discrepancy between the actual stiffness of the tendon and the measured stiffness employed in the control law. If the stiffness of tendon changes, Δkc will change, and the effectiveness of differential force feedback will also change. The root-locus of the control algorithm is shown under different Δkc/kc in Figure 8. High damping can be obtained when Δkc/kc is less than 2.5%.


An improved force feedback control algorithm for active tendons.

Guo T, Liu Z, Cai L - Sensors (Basel) (2012)

Root locus with different Δkc/kc. (a) the first mode; (b) the second mode; (c) the third mode.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472888&req=5

f8-sensors-12-11360: Root locus with different Δkc/kc. (a) the first mode; (b) the second mode; (c) the third mode.
Mentions: Because Δkc is important in the control algorithm, the control effectiveness is investigated when there is a discrepancy between the actual stiffness of the tendon and the measured stiffness employed in the control law. If the stiffness of tendon changes, Δkc will change, and the effectiveness of differential force feedback will also change. The root-locus of the control algorithm is shown under different Δkc/kc in Figure 8. High damping can be obtained when Δkc/kc is less than 2.5%.

Bottom Line: An active tendon, consisting of a displacement actuator and a co-located force sensor, has been adopted by many studies to suppress the vibration of large space flexible structures.The effectiveness of the algorithm is demonstrated on a structure similar to JPL-MPI.The results show that large damping can be achieved for the vibration control of large space structures.

View Article: PubMed Central - PubMed

Affiliation: School of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China. gtn@bjut.com

ABSTRACT
An active tendon, consisting of a displacement actuator and a co-located force sensor, has been adopted by many studies to suppress the vibration of large space flexible structures. The damping, provided by the force feedback control algorithm in these studies, is small and can increase, especially for tendons with low axial stiffness. This study introduces an improved force feedback algorithm, which is based on the idea of velocity feedback. The algorithm provides a large damping ratio for space flexible structures and does not require a structure model. The effectiveness of the algorithm is demonstrated on a structure similar to JPL-MPI. The results show that large damping can be achieved for the vibration control of large space structures.

No MeSH data available.


Related in: MedlinePlus