Tianjin Research Institute of Construction Machinery

Tianjin, China

Tianjin Research Institute of Construction Machinery

Tianjin, China

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Jin H.-Z.,Harbin Engineering University | Su X.-Y.,Harbin Engineering University | Yu A.-C.,Tianjin Research Institute of Construction Machinery | Yu A.-C.,Harbin Institute of Technology | Lin F.,Heilongjiang University
Dianji yu Kongzhi Xuebao/Electric Machines and Control | Year: 2014

From the economy and security standpoints, the paper presents an automatic mooring positioning scheme that can find out the offshore platform position accurately and rapidly on the premise of tensions' uniform distribution. In the scheme, the optimal tensions were regarded as the thresholds of switching the mooring lines. Considering the time-variance and uncertainty of the multiple-input and multiple-output positioning system under the random disturbance, the fuzzy strategy was used to control the retraction and release of the mooring lines. The improved genetic algorithm which can improve the optimization efficiency and convergence was adopted to optimize the tension, and the genetic algorithm was improved from two aspects: first, the method based on contraction was used to generate the initial population; second, local search was adopted in standard genetic algorithm.The simulation results show that the scheme is effective to balance the distribution of tensions and keep the position of offshore platform.


Feng L.-P.,Tianjin Research Institute of Construction Machinery | Feng L.-P.,Tsinghua University | Fleury E.,Korea Institute of Science and Technology | Zhang G.-S.,Tianjin Research Institute of Construction Machinery
International Journal of Minerals, Metallurgy and Materials | Year: 2012

(Al 65Cu 20Fe 15) 100-xSn x (x=0, 12, 20, 30) and Al 57Si 10Cu 18Fe 15 powders were cladded on a medium carbon steel (45# steel) substrate by laser multilayer cladding, respectively. The phases and properties of the produced quasicrystalline bulks were investigated. It was found that the main phases in the Al 65Cu 20Fe 15 sample were crystalline λ-Al 13Fe 4 and icosahedral quasicrystal together with a small volume fraction of θ-Al 2Cu phase. The volume fraction of icosahedral phase decreased as the Sn content in the (Al 65Cu 20Fe 15) 100-xSn x samples increased owing to the formation of β-CuSn phase. The increase of Sn content improved the brittleness of the quasicrystal samples. The morphology of the solidification microstructure in the Al 57Si 10Cu 18Fe 15 sample changed from elongated shape to spherical shape due to the addition of Si. The nanohardness of the laser multilayer cladded quasicrystal samples was equal to that of the as-cast sample prepared by vacuum quenching. In terms of hardness, the laser cladded Al 57Si 10Cu 18Fe 15 quasicrystalline alloy has the highest value among all the investigated samples. © University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg 2012.


Luo N.-N.,Harbin Institute of Technology | Zhao L.-J.,Harbin Institute of Technology | Jiang J.-H.,Harbin Institute of Technology | Zhang J.,Harbin Institute of Technology | Yu A.-C.,Tianjin Research Institute of Construction Machinery
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2014

The whole vehicle performance depends on the topological structure and the control strategy of hybrid power system. In this paper, a series-parallel hydraulic hybrid system is proposed on the basis of ground torque coupling mode. This kind of hydraulic hybrid system is suitable for the working condition of urban public traffic. In order to meet the instantaneous power requirement of vehicles and achieve the optimal global economy, an energy management strategy is proposed for the whole vehicle. Then, to simplify the system structure, the progressively hierarchical control method is adopted according to the hybrid system theory. Finally, through the Matlab/Simulink/Statflow co-simulation, a forward model of the whole vehicle is established and the fuel economy and the dynamic performance of a whole vehicle are analyzed under the ECE city driving cycle. The results show that the proposed system and strategy can significantly improve the engine output characteristic and effectively increase the fuel economy and the instantaneous dynamic performance of the whole vehicle. ©, 2014, South China University of Technology. All right reserved.


Wang X.-J.,Harbin University of Science and Technology | Xian C.-F.,Harbin University of Science and Technology | Wan C.-L.,Harbin University of Science and Technology | Zhao J.-B.,Harbin Institute of Technology | And 2 more authors.
Journal of Harbin Institute of Technology (New Series) | Year: 2014

In order to consider the influence of the continuous rotary motor electro-hydraulic servo system parameters change on its performance, the design method of backstepping adaptive controller is put forward. The mathematical model of electro-hydraulic servo system of continuous rotary motor is established, and the whole system is decomposed into several lower order subsystems, and the virtual control signal is designed for each subsystem from the final subsystem with motor angular displacement to the subsystem with system control input voltage. Based on Lyapunov method and the backstepping theory, an adaptive backstepping controller is designed with the changed parameters adaptive law. It is proved that the system reaches the global asymptotic stability, and the system tracking error asymptotically tends to zero. The simulation results show that the backstepping adaptive controller based on the adaptive law of the changed parameters can improve the performance of continuous rotary motor, and the proposed control strategy is feasible.


Luo N.-N.,Harbin Institute of Technology | Zhang J.,Harbin Institute of Technology | Jiang J.-H.,Harbin Institute of Technology | Zhang Q.-R.,Harbin Institute of Technology | Yu A.-C.,Tianjin Research Institute of Construction Machinery
Journal of Donghua University (English Edition) | Year: 2014

Simple and efficient energy management strategy is the key to ensure hybrid vehicle performance. Based on hybrid dynamical system theory and the concept of finite state mechanism, power split hybrid connected structure hydraulic hybrid system was proposed and described. In order to meet the demand for driving, the layered advanced control strategy was proposed in this paper, which referred to vehicle driving experience. Using Matlab/Simulink/Stateflow hybrid modeling method, the economy performance and the acceleration performance of the vehicle under the typical city driving cycles were carried on the simulation analysis. The results show that the proposed topology and control strategy can obviously improve engine output characteristic, effectively enhance the vehicle's instantaneous power performance and economy, and also has a better adaptability in different traffic environments. Copyright © 2014 Editorial Department of Journal of Donghua University. All rights reserved


Guo-Lu L.,Hebei University of Technology | Zhi-Qiang Z.,Hebei University of Technology | Zhi-Qiang Z.,Academy of Armored force Engineering | Zhi-Qiang Z.,Tianjin Research Institute of Construction Machinery | And 4 more authors.
Tribology International | Year: 2013

The aim of present study is to monitor rolling contact fatigue (RCF) behavior and analyze failure mechanism of the coating by acoustic emission (AE) technology. The results show that AE amplitude and counts are sensitive to RCF damage process, and variation regularities are different during different damage stages. Spalling is the key failure mode. RCF damage process is composed of five stages, such as elastic deformation, plastic deformation, crack initiation and propagation, crack stable growth, and unstable growth. Fatigue cracks are liable to initiate and grow along the direction of defects within the coating, such as pores and cracks. © 2013 Elsevier B.V. All rights reserved.


Zhang Z.,Tianjin Research Institute of Construction Machinery | Zhang G.,Tianjin Research Institute of Construction Machinery | Zhang J.,Tianjin Research Institute of Construction Machinery | Liu Y.,Tianjin Research Institute of Construction Machinery | And 2 more authors.
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2014

Fatigue failure may be defined as a permanent cumulative damage process in material surface or inner under long-term and cyclic stress. Remanufacturing is as the industrialization of maintain and reuse waste electromechanical products using high and new technologies. At the same time, remanufacturing is also an effective measure for economizing energy, decreasing discharge and establishing two type of society. It is an important technical problem in the process of remanufacturing industrialization development that fatigue life evaluation for remanufacturing blank and product using the scientific method. It was summarized that research present status about fatigue life evaluation technology, and introduced that fatigue life evaluation methods were applied to remanufacturing blank and product. Future research direction and the mainly existing problems were also discussed.


Qiu L.-F.,University of Science and Technology Beijing | Chu H.-Y.,University of Science and Technology Beijing | Chu H.-Y.,Tianjin Research Institute of Construction Machinery | Yang D.-B.,University of Science and Technology Beijing | Shi G.-G.,University of Science and Technology Beijing
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | Year: 2014

A general pseudo-rigid-body model was built for multi-layered lamina emergent mechanisms (LEMs). Based on the analogous linear coil spring model of lamina emergent torsional (LET) joints, a general theoretical formula was derived to describe the relationship between the input load and the output angular displacement of LEMs. The main structural parameters influencing the output were analyzed, and their influence trends were studied in the same load case. According to analysis results, a set of initial values was designed to the structural parameters for an example of the mechanism. The effects of the length and width of LET joint torsional hinges on the angular displacement and error of the mechanism were discussed by theoretical calculations and finite element simulation.


Hu B.,Yanshan University | Lu Y.,Yanshan University | Xu J.,Tianjin Research Institute of Construction Machinery | Yu J.,Hebei Normal University of Science and Technology
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | Year: 2011

A novel 2UPR+SPR parallel manipulator (PM) is proposed. The two RPU legs of this PM provide four constraints whereas two of them are overconstraints due to the particular arrangement of the joints in RPU legs. The UPU leg provides one constrained force for this PM. The velocity constraint equation of this PM is established, and based on this, the degree of freedom of this PM is analyzed. The geometric constraint equations of this PM are established, the independent motion parameters which express the pose of mechanism end are determined, and the coupling relations of the pose, velocity and acceleration of the platform on the mechanism are derived. The inverse kinematics, velocity and acceleration of this PM are solved, and the detailed kinematics model of RPU and UPU type leg is established. The dynamics model is established on the basis of the principle of virtual work and the kinematics model of this PM, and the simulation of mechanism dynamics is implemented by using Matlab software. The simulation results testify the validity of the analytic model. The analytic method for this PM is fit for other over-constrained PMs. © 2011 Journal of Mechanical Engineering.


Lu R.S.,Xiamen XGMA Machinery Co. | Xu B.,Xiamen XGMA Machinery Co. | Huang H.T.,Xiamen XGMA Machinery Co. | Zhang G.S.,Tianjin Research Institute of Construction Machinery | Wu Z.X.,Xiamen XGMA Machinery Co.
Applied Mechanics and Materials | Year: 2013

The high-efficiency cleaning is one of the key technologies in the remanufacturing process. It is the premise and guarantee for remanufactured core inspection and machining. It also is an important link to improve quality and reliability of remanufactured products. On the basis of analyzing the structural feature, working conditions and main dirt of worn-out or discarded component of axles and transmission of construction machinery, the remanufacturing cleaning technology is discussed. © (2013) Trans Tech Publications, Switzerland.

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