The development of the actuator prototypes for the active reflector of FAST

Wang, Qiming; Wu, M. C.; Zhu, Ming; Xue, Jianxing; Zhao, Qiang; Gu, Xuedong

doi:10.1117/12.925800

Cited by 5 publications

(2 citation statements)

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“…A total of 2,225 actuators are installed in the main reflector system .These actuators work outdoors over a long, continuous time period; therefore, actuator reliability is important. Prototypes have been manufactured for testing on a platform for long-term continuous loading during the actuator design phase (Wang et al, 2012) to appraise the feasibility and reliability of the design.…”

Section: Introductionmentioning

confidence: 99%

Fatigue reliability theory-based optimal design of wire ropes on test platforms for FAST actuators

Zhu

Wang

Yang

et al. 2015

Multidiscipline Modeling in Materials and Structures

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Purpose – Three test platforms for long-term continuous loading are adopted to test the actuator prototypes of the 500-meter aperture spherical radio telescope (FAST). However, the wire ropes that are the key components of these platforms often break during testing. The purpose of this paper is to present an effective dimension design method for these wire ropes. This method is based on fatigue reliability theory. Design/methodology/approach – Three types of stresses are introduced into the total stress model of the wire rope according to the complicated stress conditions. The fatigue strength of the ropes is also discussed in this paper. Then, the total stress model and the results of fatigue strength analysis are applied to set the optimization function for these wire ropes. Subsequently, this optimization function is used to calculate the reliability of previously developed wire ropes in relation to the actuator test platform. Findings – The wire rope is unreliable, which is a finding that corresponds to those of previous tests. Upon drawing the optimal curve from the optimization function (whose optimal objective is the wire diameter), a wire rope is optimized for the FAST actuator test platforms. Finally, this optimized rope is used on the new actuator test platform. No fracture phenomenon has been detected in tests conducted over the past six months. Originality/value – The fatigue reliability theory-based optimization function for wire ropes can be adopted for the universal dimension design of other wire ropes.

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Section: Introductionmentioning

confidence: 99%

Fatigue reliability theory-based optimal design of wire ropes on test platforms for FAST actuators

Zhu

Wang

Yang

et al. 2015

Multidiscipline Modeling in Materials and Structures

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“…As one of three critical innovations of FAST, the main active reflector system is composed of ring beam, reflector elements, actuators, cables and anchors [2,3]. As the main support structure, ring beam is supported by Lattice columns.…”

Section: Introductionmentioning

confidence: 99%

The Monitoring of Temperature Effect on the Supporting Structure of Main Active Reflector for FAST

Wnag¹,

Zhu²,

Wang³

et al. 2017

Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017)

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Abstract. The variations of ambient temperature can change the state of the supporting structure of the reflector for Five-hundred-meter Aperture Spherical Radio Telescope. The purpose of this research is to monitor the temperature and the varieties to find their relationship. Firstly, the temperature monitoring system is introduced. Then, this study proposed a temperature analysis method based on the polynomial regression technique. After that, the influences of the non-uniform temperature field brings by the sunshine to the ring beam is presented. Meanwhile, the relationships between the variations of the stress for ring beam, the shape of ring beam and cable forces with temperature changes are figured out. The results reveal that the temperature field of the ring beam under sunshine is non-uniform, but the temperature difference is less than 6℃. However, the seasonal temperature difference has great influence on the shape of ring beam and the force of main cables. These results provide useful support for the future monitoring and safety assessment of supporting structure for FAST.

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Reliability evaluation of key hydraulic components for actuators of FAST based on small sample test

Zhu

Zhao

Wang

2017

Int. J. Precis. Eng. Manuf.

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The development of the actuator prototypes for the active reflector of FAST

Cited by 5 publications

References 0 publications

Fatigue reliability theory-based optimal design of wire ropes on test platforms for FAST actuators

Fatigue reliability theory-based optimal design of wire ropes on test platforms for FAST actuators

The Monitoring of Temperature Effect on the Supporting Structure of Main Active Reflector for FAST

Reliability evaluation of key hydraulic components for actuators of FAST based on small sample test

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