Time filter

Source Type

Chen Z.,Zhuzhou Times New Material Technology Co. | Yang Q.,Zhuzhou Times New Material Technology Co. | Ning X.,Zhuzhou Times New Material Technology Co. | Tu F.,Zhuzhou Times New Material Technology Co. | And 2 more authors.
Journal of Earthquake Engineering and Engineering Vibration | Year: 2014

A dual-out rod MR damper is designed and manufactured. The theoretical formulas and simulation results of the magnetic circuit by finite element method are given, and the result of magnetic field test of the gap is also presented. The relationships between damping force and input excitation and current are obtained through full scale tests. Accurate dynamic model of the MRFD is established. Finally, this damper is installed in the isolation system for shaking table test based on dSPACE system. It shows that the results obtained by the theoretical simplified calculation, finite element analysis and test are coincident. This verifies the feasibility and accuracy of the simplified calculation and finite element analysis in the preliminary design of the product. The proposed dynamic model of the damper is accurate. The controllability of the damper and effectiveness of control algorithms are verified. These works provide specific methods and ideas for future research and development of the MRFD.

Ning X.-L.,Zhuzhou Times New Material Technology Co. | Ning X.-L.,Harbin Institute of Technology | Liu H.-J.,Harbin Institute of Technology | Tan P.,Guangdong Key Laboratory of Earthquake Engineering and Applied Technique | And 2 more authors.
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | Year: 2010

This paper deals with the robust H2/H∞ control problem for structure with dynamic characteristic uncertainties. In the process of designing the controller, uncertain parameters (including mass, stiffness and damping) of structures are introduced into perturbation matrix, meanwhile, both the H∞ disturbance suppression and the optimal H2 performances of the closed-loop control system are satisfied simultaneously for all allowable uncertainties. To solve the proposed multi-objective optimization problem, linear matrix inequalities (LMIs) are deduced based on the LMI optimization technology, and LMI toolbox of MATLAB is employed to obtain the output feedback controller. Results of vibration control analysis for a 3-story simplified structure show that the proposed method is efficient and superior.

Huang D.-Y.,Harbin Institute of Technology | Tan P.,Guangdong Key Laboratory of Earthquake Engineering and Applied Technique | Zhou F.-L.,Harbin Institute of Technology | Zhou F.-L.,Guangdong Key Laboratory of Earthquake Engineering and Applied Technique | Yan X.-Y.,Harbin Institute of Technology
Journal of Harbin Institute of Technology (New Series) | Year: 2010

A tuned hybrid-tanks/mass damper (THMD) system is presented in this paper, and the equation of motion of structure-THMD system is formulated. A phasic difference analysis method is also presented to analyze the dynamic effect of water in hybrid-tanks composed of TLCD and TLD on the control performance of THMD system. Numerical simulation is conducted and performances of an ordinary TMD, TLD, TLCD and THMD are compared under wind and earthquake excitation, respectively. Results show that the designed THMD can achieve a performance level close to that of the ordinary TMD, and outperforms TLD and TLCD. As compared with the ordinary TMD, THMD is more economical and practical.

Discover hidden collaborations