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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

Mode shapes of the structure.
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f2-sensors-12-11360: Mode shapes of the structure.

Mentions: The free-free truss was adopted to assess the accuracy of the differential force feedback algorithm (Figure 1). The geometry is representative of the JPL-MPI [18]. The truss consists of aluminum pipes. The dimension of the structure and the parameters of the truss are shown in Table 1. The first three vibration modes without active tendons are displayed in Figure 2. In this study, two different types of tendon have been used: a soft tendon of 1 mm diameter made of polyethylene (EA = 4,000 N) and a stiffer one made of “Dynema” synthetic fiber (EA = 18,000 N) [18].


An improved force feedback control algorithm for active tendons.

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

Mode shapes of the structure.
© Copyright Policy
Related In: Results  -  Collection

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

f2-sensors-12-11360: Mode shapes of the structure.
Mentions: The free-free truss was adopted to assess the accuracy of the differential force feedback algorithm (Figure 1). The geometry is representative of the JPL-MPI [18]. The truss consists of aluminum pipes. The dimension of the structure and the parameters of the truss are shown in Table 1. The first three vibration modes without active tendons are displayed in Figure 2. In this study, two different types of tendon have been used: a soft tendon of 1 mm diameter made of polyethylene (EA = 4,000 N) and a stiffer one made of “Dynema” synthetic fiber (EA = 18,000 N) [18].

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