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Research Papers

Integrated Control of Thermally Induced Vibration and Quasi-Static Deformation of Space Truss

[+] Author and Article Information
Jie Wang

College of Aerospace Science and Engineering,
National University of Defense Technology,
No. 47 Yanwachi Street,
Changsha 410073, China
e-mail: wangjie@nudt.edu.cn

Dongxu Li

College of Aerospace Science and Engineering,
National University of Defense Technology,
No. 47 Yanwachi Street,
Changsha 410073, China
e-mail: dongxuli@nudt.edu.cn

Jianping Jiang

College of Aerospace Science and Engineering,
National University of Defense Technology,
No. 47 Yanwachi Street,
Changsha 410073, China
e-mail: jianpingjiang@nudt.edu.cn

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received June 27, 2015; final manuscript received March 31, 2016; published online May 25, 2016. Assoc. Editor: Ming Xin.

J. Dyn. Sys., Meas., Control 138(8), 081003 (May 25, 2016) (8 pages) Paper No: DS-15-1292; doi: 10.1115/1.4033407 History: Received June 27, 2015; Revised March 31, 2016

Dynamic vibration and quasi-static deformation will occur simultaneously for flexible space structures subjected to sudden thermal loads. In this paper, the integrated controller based on modified positive position feedback (PPF) compensator is proposed as an innovative controller for active deformation reduction in flexible space trusses. The controller uses the concept of positive acceleration feedback combined with integral position feedback to provide effective vibration suppression of multiple modes and compensator of quasi-static deformation. To solve the problem of placement optimization for both sensors and actuators, the discrete glowworm swarm optimization (GSO) algorithm based on genic binary coding is suggested. A cantilevered truss is taken as an example for numerically evaluating the performance of the controller for thermally induced deformation control. Numerical results demonstrate that the discrete GSO algorithm is feasible in solving the combinatorial optimization problem. And the proposed controller is significantly effective in controlling both steady-state deformation and transient vibration.

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References

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Figures

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Fig. 1

Architecture of the truss with controller

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Fig. 2

Closed-loop controlled system of truss with modified PPF compensator

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Fig. 3

Architecture of the truss

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Fig. 4

Sketch map of shadowed space truss

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Fig. 5

Temperature of longerons

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Fig. 6

Tip deformation in X direction

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Fig. 7

Tip deformation in Y direction

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Fig. 8

Variation in objective function with iterations

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Fig. 9

Uncontrolled and controlled X-axial deformation

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Fig. 10

Uncontrolled and controlled Y-axial deformation

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Fig. 11

Uncontrolled and controlled X-axial velocity

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Fig. 12

Uncontrolled and controlled Y-axial velocity

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Fig. 13

Force of actuators in the control processes

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Fig. 14

Force of springs in the control processes

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