A new detecting platform has been designed and developed to improve the performance of suspended access platform’s hoists in the paper. The new platform consists of a mechanical and control piece. The core control system is designed based on S7-200PLC and VB6.0; Computer is a superior machine and S7-200PLC is an inferior machine in the system; VB6.0 is used in the superior machine as the development platform. Testing data will be saved into Excel2000 by using VB's OLE automation technology; and in the VB environment, using OPC standard drive will complete real-time data communication between superior and inferior, also complete data processing at the same time. Therefore, Man-machine interface and reliable control system can be built. The inferior computer can achieve running and testing process control of hoists and collect the data of tension, vibration and temperature of hoists. The practical application of the platform shows that the system can well reduce the time costs and improve test results’ inaccurate of existing detection methods. The detection efficiency is improved; the labor intensity of operators and the running costs of produces are reduced, greatly.

Interface (matter)

10.4028/www.scientific.net/amr.201-203.1373

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Citations (1)

Tailoring the Solidification Microstructure and Properties of Cu-12sn-Xbi-2ni Alloys by Varying Bi Content

Jinchuan Jie Jia Sun Mingfei Wang Bo Peng Bowen Dong

A novel self-lubricating Cu-Sn-Bi alloy is designed and the effect of Bi content on microstructure and properties of Cu-12Sn-xBi-2Ni was investigated. The addition of Bi destroyed the continuity of network Sn-rich phase in Cu-12Sn-2Ni alloy and transform it into a blocky morphology. In addition, dispersive Bi-rich phase and lamellar Sn-rich phase are distributed around the blocky precipitate, which is conducive to improving the friction property. The formation reason of the solidification microstructure was analyzed by CALPHAD method and verified by water quenching experiment. Although the tensile properties decreased with the increase of Bi content, the hardness of the alloy were increased. The Brinell hardness of the alloy reaches a maximum value of 118.6 HB when the Bi content is 4 wt.%. And the friction coefficient of the alloy reaches the lowest value of 0.121 when the Bi content is 6 wt.%. Cu-12Sn-6Bi-2Ni alloy is the best alloy with the most excellent self-lubricating property.

Content (measure theory)

10.2139/ssrn.4632289

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A Novel Technique in the Production of Dispersively Distributed Bi and Lamellar Eutectoid in Cu-Sn-Bi Systems

Jia Sun Mingfei Wang Bo Peng Jinchuan Jie Bowen Dong

Due to the toxicity and environmental pollution of lead, researchers are currently searching for alternative alloys. Bi has attracted more and more attention due to its non-toxicity and physical properties similar to Pb. The Cu-12Sn-xBi-2Ni alloys were designed to avoid the formation of continuous network structure of Bi in Cu alloy. The microstructure of Cu-12Sn-2Ni alloys with varying Bi contents was observed and the mechanical properties of the alloys were tested. Lamellar precipitates and dispersively distributed Bi-rich phase appear around the Sn-rich phase as the addition of Bi. The tensile properties of the alloy decrease with the increase of Bi content from 0 wt.% to 6 wt.%. The Brinell hardness of the alloy increases first and then decreases, reaching a maximum value of 118.6 HB when the Bi content is 4 wt.%. The pseudo-binary phase diagram of Cu-12Sn-xBi-2Ni (wt.%, x=0, 2, 4, 6) was calculated by CALPHAD to analyze the formation mechanism of lamellar precipitates and dispersively distributed Bi-rich phase, and results were verified by water quenching experiment. This paper certifies the formation process of lamellar microstructure in the Cu-12Sn-xBi-2Ni alloys, which provides the idea for the composition design of Cu-Sn-Bi alloy.

10.2139/ssrn.4543666

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A review of lithium application for the plasma-facing material in EAST Tokamak

Reviews of Modern Plasma Physics (2023)

Jiansheng Hu Luyang Li Guizhong Zuo Zhen Sun Weiye Xu

Limiter

10.1007/s41614-023-00114-7

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Citations (5)

Analysis of Leveling Control System via Iterative Linear Matrix Inequalities with Full Order Observer

Advanced materials research (2012)

Jia Sun Yu Hou Wu Nan Xiao

Abstract. This paper investigates leveling control system of suspended access platform using an observer-based controller. Uncertain linear systems for leveling control are derived and represented in terms of a set of matrix inequalities. In the system, all state variables needn’t be measured; the perturbations of leveling control are assumed to be described by structural uncertainties. The stiff problem is avoided since the design procedure is independent of the small parameter. The control problem can be effectively solved by the proposed iterative linear matrix inequality approach. The convergence of the algorithms is also studied. Furthermore, a numerical example and simulation results are given to illustrate the effectiveness of proposed method.

Observer (physics)

Linear matrix inequality

Matrix (chemical analysis)

10.4028/www.scientific.net/amr.472-475.1473

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