In this study, active tendons with Proportional Integral Derivation type controllers were applied to a SDOF and a MDOF building model. Physical models of buildings were constituted with virtual springs, dampers and rigid masses. After that, equations of motion of all degrees of freedoms were obtained. Matlab Simulink was utilized to obtain the block diagrams for these equations of motion. Param...

This paper presents an innovative method for accurate mobile robot dead-reckoning, called Internal Posi tion Error Correction (IPEC). In previous work, the IPEC method was successfully implemented on a specially designed mobile robot with two differential drive axles, called the Multi-Degree-of-Freedom (MDOF) mobile robot. Experimental results with the MDOF robot showed consistently one to two ...

Abstract Because the vibration of buildings plays an important role in resisting earthquake, we need some methods to analyze MDOF systems. This paper proposes a method structural dynamics and systems by using “modal superposition method” “Duhamel integral”. We set system consisting mass, stiffness, damping correspond actual situations. The results obtained this research include E.O.M: natural f...

Recent studies demonstrate that flexible (compliant) structures are safer with respect to conventional stiff actuation systems [1-2] and are even capable of being more energy-efficient [3] or achieve better performances [4] if controlled properly. However, despite the proved benefits of compliance, the integration of actuators with passive fixed or variable stiffness within multi-DOF (MDOF) rob...

The problem of obtaining the underlying linear dynamic compliance matrix in the presence of nonlinearities in a general Multi-Degree-of-Freedom (MDOF) system can be solved using the Conditioned Reverse Path (CRP) method introduced by Richards and Singh (1998 Journal of Sound and Vibration, 213(4): p. 673-708). The CRP method also provides a means of identifying the coefficients of any nonlinear...

A Response Surface (RS) strategy is presented for the evaluation of the response statistics of dynamic systems subjected to stochastic excitation. The proposed approach adopts a strategy based on the High Dimensional Model Representation (HDMR), which gives a Gaussian Model (GM) of the response. The GM requires only a reduced number of analyses which can be adopted for all the degrees of freedo...

A nonlinear energy sink (NES) is characterized by its ability to passively realize targeted energy transfer as well as multimodal damping. This latter feature seems to make this device very well suited for reducing the vibration level of MDOF linear structures. The perspective of dealing with MDOF linear primary structures requires the development of an efficient NES design procedure. This pape...

The aerodynamic performance improvement of radial impellers is positive significance to improve the overall hydrogen fuel cell systems (FCS). Our team proposes a multi-degree-of-freedom (MDOF) surface parameterization method for global automatic optimization impeller aerodynamics. MDOF characterized by fewer variables, construction ease, smoothness, good flexibility, and blade strength maintena...