Wind-load estimation with equivalent-input-disturbance approach
11 Jul 2022-pp 921-925
TL;DR: In this paper , the authors present a new method to estimate an along-wind load that contains a mean component using an equivalent-input-disturbance approach, which does not require that the damping coefficient is Rayleigh damping.
Abstract: This paper presents a new method to estimate an along-wind load that contains a mean component using an equivalent-input-disturbance approach. An along-wind force contains both mean and fluctuating components. However, most studies estimate only fluctuating components. Moreover, these studies assume that the damping matrix is a Rayleigh one. In contrast, this paper presents a method that estimates both the mean and fluctuating components using velocity response. Furthermore, this method does not require that the damping coefficient is Rayleigh damping. The numerical verification verifies using an 11 degree-of-freedom(DOF) model of a seismic-isolated building. The results presented that the presented method accurately estimates an along-wind load.
TL;DR: In this paper, a high-precision positioning control of a dual-stage feed drive was proposed based on the equivalent input-disturbance (EID) approach to improve the disturbance rejection performance.
Abstract: This paper deals with the high-precision positioning control of a dual-stage feed drive. The design of the control system is based on the equivalent input-disturbance (EID) approach to improve the disturbance rejection performance. An analysis of the EID approach reveals the mechanism of disturbance rejection. The design procedure is illustrated by a numerical example. Simulation results show that the EID control system not only rejects disturbances, but also suppresses uncertainties and nonlinearities in the plant. Design and simulation results for the example are also employed to compare our method with the disturbance observer method, and to demonstrate the validity of our method.
TL;DR: In this paper, an analytical procedure is developed based on the Kalman filtering approach to estimate modal loads applied on a structure using limited measured response of the structure, which is evaluated in the frequency domain through numerical analysis for a single-degree-of-freedom (SDOF) and a multidimensional (MDOF) system.
TL;DR: In this article, a method for modal wind load identification from across-wind load responses using Kalman filter is presented and verified using the wind tunnel test data using a rectangular shaped concrete chimney.
TL;DR: Results show that customization of the hysteresis behaviors throughout a structure is necessary to yield optimal performance, and the PVFD outperforms the other damping schemes for wind mitigation by yielding a more stable response in terms of lower accelerations over the entire wind event.