...-mails:  laviet80@yahoo.com ; ldviet@imech.vast.vn 25 10 2020 23 02 2021 19 03 2021 vibration energy harvesting analytical optimization switching controller frequency response optimal bound Energy harvesting from ambient vibration was well known in literature...

...Wen-Hua Chen Frequency response finds a wide range of applications in many engineering sectors. When variations and uncertainties exist during the operation and lifetime of an engineering system, the calculation of frequency response for an uncertain dynamic system is required in order to assess...

... in engineering practice, the class of harmonic disturbances is studied in particular and performance measures for this class of disturbances are proposed based on so-called generalized frequency response functions for convergent systems. Additionally, the derived control strategy is extended by including...

... that represent plant dynamics variation. An original set of parameters is estimated by nonlinear least-squares (NLS) optimization using noisy frequency response functions. Utilizing the property of asymptotic normality for NLS estimates, the original parameter set can be reparameterized by an affine function...

... speed camera. First we introduce the paradigm of virtual sensors in the field of modal analysis using video processing. To validate our method, a simple experiment is proposed: an Oberst beam test with harmonic excitation (mode 1). Then with the example of a helicopter blade, frequency response...

...Xingjian Jing; Ziqiang Lang The generalized frequency response function (GFRF) for Volterra systems described by the nonlinear autoregressive with exogenous input model is determined by a new mapping function based on its parametric characteristic. The n th -order GFRF can now be directly...

... experimentally. Experimental methods based on measurements of frequency response functions (FRFs) are subject to bias errors due to suspension effects. This paper proposes a method for eliminating these errors by using a single-wire suspension condition and modeling the suspension’s effect on the FRFs...

...Thomas J. Connolly; Raul G. Longoria Refinement or improvement of a dynamic system to meet a frequency response specification can benefit from the option to use passive or active compensation, or a combination of both. The process becomes more effective when supplemented with methods derived from...

...Yong-Kwan Lee; Leonid S. Chechurin Theoretical analysis of the stability problem for the control systems with distributed parameters shall be given. The approach to the analysis of such systems can be composed of two parts. First, the distributed parameter element is modeled by a frequency response...

...Andrew W. Osburn; Matthew A. Franchek A method for designing repetitive feedback controllers using nonparametric frequency response plant models is developed. In comparison to the zero-phase-error (ZPE) controller (ASME J. Dyn. Syst. Meas. Control, 111 , pp. 353–358), this method has the added...

... phase control sensitivity frequency response uncertain systems Linear Systems Nonminimum Phase Delay Gain Margin Phase Margin For a nonminimum-phase (NMP) plant, such as a plant with pure delay, classical proportional-integral derivative (PID) controller tuning methods...

... as defined by their pass-bands requires that an effective fusion technique be used to unite multi-sensor data. A multi-sensor data fusion scheme using Frequency Response Methods is developed to facilitate the possible implementation of proposed sensor arrays. Contributed by the Dynamic Systems...

... that the achievable closed-loop performance is limited in a unique way: the high-frequency response of the controlled closed-loop system converges to the dynamics of the open-loop physical plant that is interacting with the emulated load. This paper illustrates the three controller configurations of the indirect...

... distortions. The non-planar nonlinear continuum dynamics of a resonating base excited cantilever are reduced to a set of state-space coupled Duffing equations with centripetal acceleration. Methods for experimentally determining the model parameters are developed. The analytic frequency responses for raster...

...H. Van der Auweraer; P. Guillaume; P. Verboven; S. Vanlanduit A new noniterative frequency domain parameter estimation technique is proposed. It is based on a weighted total least squares approach, starting from multiple input multiple output frequency response functions. One of the specific...

...Mi-Ching Tsai In this paper the H ∞ robust control technique is applied to design a switched reluctance motor drive where the rotor position sensor provides just six pulses per revolution. A control system analyzer is used to obtain the frequency responses at each design step. To reduce the effect...

...Forbes T. Brown, Professor,; Stephen C. Tentarelli, Lead Mechanical Engineer, A general transmission-matrix approach is given for finding the frequency response of linearized long-wavelength models for the vibration in systems with straight and curved fluid-filled tubes. Couplings between the fluid...

... conditions. The concept of the global matrix also is extended to systems with junctions and closed loops, permitting practical solution for frequency responses without round-off error problems. The procedure can be generalized to handle a broad class of systems comprising a combination of lumped elements...

..., deduce models independent of system inputs and outputs. FD-MODA uses frequency response methods to deduce models of a single input-output pair. In this paper, an input-output criterion based on controllability and observability is combined with the frequency based criterion used by MODA. The new model...