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Liu G.-L.,Shenyang University of Technology | Zhang G.-Y.,Shenyang Normal University | Bao J.-S.,Shenyang Siasun Robot and Automation Company Ltd | Zhang H.,Shenyang Normal University
Wuli Xuebao/Acta Physica Sinica | Year: 2014

The synergistic catalytic mechanism of anion, cation ions in TiF3, TiCl3 catalysts for LiBH4 has been studied by first-principles method based on density functional theory. According to the results, Ti metal doping in LiBH4 is not easy realized with respect to halogen elements. Co-doping with transition metal and elements in halogen family is achieved easier than doping with Ti alone. For TiF3 catalyst, to achieve doping with one kind of element is helpful to doping with another kind of element, which accordingly results in the increase of doping concentration. Based on the analysis of the electronic structure, we find that doping with halogen element alone can reduce the stability of LiBH4; while doping with Ti alone leads to the rise of Fermi level; the introduction of defect energy level and the weakening of B-H bond; these may be responsible for improving greatly the desorption kinetics of LiBH4 by titanium halide catalysts. The improvement of the dehydrogenating kinetics of LiBH4 with titanium halide catalyst additives is mainly due to the B-H bond weakening, which makes H atom diffuse easily. For TiF3, TiCl3 catalysts, in the reversible desorption process of LiBH4, F and Ti have synergistic action for the B-H bond weakening, but the synergistic action of Cl and Ti is not obvious, this may be the reason for the advantage of TiF3 over TiCl3 in LiBH4 catalytic reaction. ©, 2014, Chinese Physical Society.


Zhang G.Y.,Shenyang Normal University | Liu G.L.,Shenyang University of Technology | Bao J.S.,Shenyang Siasun Robot and Automation Company Ltd | Liu C.M.,Northeastern University China | Zhang H.,Shenyang Normal University
Advanced Materials Research | Year: 2014

The energetic study of B effects on the oxidation of γ-TiAl alloys are performed by using the first-principles method based on Density Functional Theory (DFT) in this paper. The surface and interface segregatation of B as well as of the surface adsorption of O are discussed. B is found to preferentially segregat to TiAl subsurface with respect to γ-TiAl bulk. The B segregation at surface decreases oxygen coverage in the initial oxidation process of γ –TiAl alloys, thereby it is beneficial to the decrease of the growth of γ–TiAl alloys oxide film. In the initial oxidation process, oxygen prefers to stay in the vicinity of surface Ti atoms, and B addition is beneficial for the decrease of the growth of A12O3 and TiO2. After the formation of Al2O3 oxide film, B is energetically favoured stayed at interstitial site of α-Al2O3 (0001)/γ-TiAl(111) interface, and enhances the adhesion of this interface. © (2014) Trans Tech Publications, Switzerland.


He L.,Northeastern University China | Li K.,Shenyang Municipal Public Security Bureau | Wang H.,Shenyang SIASUN Robot and Automation Co.
Proceedings of the 28th Chinese Control and Decision Conference, CCDC 2016 | Year: 2016

During applications of DC-DC converters, it was found that the poor control accuracy is usually caused by the model mismatch which may come from the circuit parameters changes. In this paper we propose the method with data-driven model-free adaptive controller and applied it to the Boost converter. Comparing the data-driven model-free adaptive control with the PID control, The experimental result shows, the data-driven full-format model-free adaptive controller has more stable accuracy and is more capable of anti-interference, robustness and anti-mismatch. © 2016 IEEE.


Sun S.,Shenyang University of Technology | Yao H.,Shenyang Siasun Robot and automation Co. | Wang M.,Shenyang University of Technology
Applied Mechanics and Materials | Year: 2013

A mechanical component may fail in many modes that are usually not independent. There is generally not a joint probability density function to describe these correlated failure modes. Thus, it is difficult to compute the reliability with considering the correlations between the failure modes. It is supposed that three or more failure modes arise synchronously to be a very small probability event. The relationship between ultimate state functions in different failure modes is established by utilizing linear regression method. A double integration modal for reliability of mechanical components with dependent failure modes is built according to stress-strength interference model. In case of square, cube or exponential relationship between two ultimate state functions, a linear transformation is made. An example of pin is discussed. Its reliability is compared with that obtained using Monte Carlo method, which represent that the reliability model with multi-failure modes proposed is correct. © (2013) Trans Tech Publications, Switzerland.


Xu G.-J.,Shenyang University of Technology | Huang X.,Shenyang University of Technology | Hang Z.-X.,Shenyang University of Technology | Xing F.,Shenyang Siasun Robot and Automation Co. | And 2 more authors.
Dongbei Daxue Xuebao/Journal of Northeastern University | Year: 2012

The Nd: YAG laser and 6-axis robot were used for powder inject laser cladding process with Stellite 6 and WC mixed powder cladded on mild carbon steel plates (SM400B). The dilution rate, cracking susceptibility, microstructures, Vickers hardness and wear resistance were investigated. The results showed that the cracking susceptibility, Vickers hardness and wear resistance were increased with the percentage of WC addition in the range of 0%~90%. In addition, when the content of WC was low (0~40%), the microstructures of the laser cladding layers is hypoeutectic. With the content of WC increased, the content of primary columnar crystals decreased, while the content of eutectic crystals increased. When the content of WC was higher (50%~100%), the microstructures of the clad layers is hypereutectic. With the content of WC increased, the content of primarycarbide increased, while the content of eutectic microstructure decreased.


Xu G.-J.,Shenyang University of Technology | Liu X.-Y.,Shenyang University of Technology | Hang Z.-X.,Shenyang University of Technology | Xing F.,Shenyang Siasun Robot and Automation Co. | Shi L.,Shenyang Siasun Robot and Automation Co.
Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology | Year: 2012

In order to study the dissimilar welding performance of spheroidal graphite cast iron (FCD450) and ferrite stainless steel (SUS430), the laser-MIG hybrid welding tests for FCD450 and SUS430 were carried out through adopting three kinds of welding wires with different mass fraction of Ni, and the optimum welding condition was determined. The microstructure, constituent distribution and hardness distribution of welding joints were analyzed with optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), electron probe microanalysis (EPMA) and Vicker's hardness tester. In addtion, the tensile tests were performed for the welding joints. The experimental results show that under the optimum welding condition, no crack is found in the welding joints and the welding performance is good with adding three kinds of welding wires. Due to the adoption of the welding wires, the mass fraction of Cr and Ni in the welding seam area is higher. With increasing the mass fraction of Ni in the welding wires, the width of welding seam obviously reduces. Due to the existence of ledeburite and martensite, the fracture of all tensile specimens occurs in the partial melting zone or heat affected zone (HAZ) at FCD450 side.


Wu B.,University of Chinese Academy of Sciences | Qu D.,University of Chinese Academy of Sciences | Xu F.,University of Chinese Academy of Sciences | Song J.,Shenyang SIASUN Robot and Automation Co. | Hu J.,Shenyang SIASUN Robot and Automation Co.
Proceedings of the World Congress on Intelligent Control and Automation (WCICA) | Year: 2015

For industrial robot force signal measurement, we proposed a multi-parameter overall identification method, the results of identification used to compensate six-axis force/torque sensor sampling data, can greatly improve the measurement accuracy of contact force between robot end-effector and the environment. The parameters need to be identified comprise a deflection angle between the sensor coordinate system and the robot sixth axis coordinate system, the gravity of end-effector, the center of gravity of robot end-effector, the zero drift of sensor, a total of 11 parameters. The core idea of the parameters identification is that, firstly, building a parameter identification model about the parameters need to be identified, the robot posture, and the force measured by the sensor; Then, restructuring the parameters as unknown vector; Finally, using the least squares method to calculate the unknown vector which is the result of parameters. This method has two advantages: first, it overall consider a variety of factors, improve the measurement accuracy of the contact force; Second, it can overall identify all parameters, improve the identification efficiency. The theoretical analysis and experimental verification proved the correctness and validity of the method. © 2014 IEEE.


Zhang L.,CAS Shenyang Institute of Automation | Zhang L.,Shenyang SIASUN Robot and Automation Co. | Zhang L.,University of Chinese Academy of Sciences | Qu D.,CAS Shenyang Institute of Automation | And 3 more authors.
Jiqiren/Robot | Year: 2010

For the problem that stereo matching methods based on graph cuts are time consuming, this paper puts forward an improved stereo matching algorithm based on reduced graphs. First, the initial disparity for each pixel can be calculated by using local matching method. Then, we keep only some potential disparity values in the complete graph, and the reduced graph will contain a reduced number of vertices and edges. Therefore the graph capacity and execution time are decreased, and a wider disparity range is obtained. At last, it is proved by experiments that this algorithm can achieve a relatively ideal disparity map and save much time in stereo matching.


Guo T.,Shenyang Jianzhu University | Han T.,Shenyang Jianzhu University | Qiu J.,Shenyang SIASUN Robot and Automation Co. | Wei H.,Shenyang SIASUN Robot and Automation Co.
Proceedings - 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011 | Year: 2011

In this paper, Shenyang No. 1 Line Metro Environment and Equipment Monitoring System (MEEMS) is developed based on CIMS architecture. Because all parts of MEEMS systems need to be tested before delivery, System platform is designed. Three-layer control structures of MEEMS systems is designed, which are test platform composed of center-level, station-level and on-site-level. The simulation test platform software system is realized using the method of industrial configuration and modular design, and its advantages are analyzed. Practical application shows this simulation test platform has the characteristic of reliability, flexibility and openness.


Wang X.,Northeastern University China | Zhang P.,Shenyang Siasun Robot and Automation CO. | Wang J.,Northeastern University China
2013 25th Chinese Control and Decision Conference, CCDC 2013 | Year: 2013

Switching control is a basic anti-surge control strategy for compressor, according to the problem that the switching point is mainly chosen by human experience, this paper presents a method that can determine the anti-surge point automatically. This paper uses the Generalized Minimum Variance (GMV) benchmark to assess the performance of control systems, by monitoring the performance changes of anti-surge control system, and according to the relationship of anti-surge technological requirements and the control performance index, it can automatically calculate the switching point of anti-suge control. The simulation results show that the method has effective and practical characters. © 2013 IEEE.

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