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CDM-based closed-loop transfer function design for ramp input
, Article Transactions of the Institute of Measurement and Control ; Volume 33, Issue 5 , 2011 , Pages 558-572 ; 01423312 (ISSN) ; Tavazoei, M. S ; Sharif University of Technology
2011
Abstract
This paper presents a method to determine the denominator and numerator polynomials of a closed-loop transfer function in order to obtain desired transient and steady-state responses in terms of the overshoot, speed (time needed for the relative error to become less than a specific amount) and the steady-state error when the desired output is a ramp signal. Meanwhile, a controller is designed with the same characteristic equation for the closed-loop system to eliminate step and ramp disturbances
Evaluation of the seismic performance factors for steel diagrid structural systems using FEMA P-695 and ATC-19 procedures
, Article Bulletin of Earthquake Engineering ; Volume 18, Issue 10 , 2020 , Pages 4873-4910 ; Seyedkazemi, A ; Sharif University of Technology
Springer
2020
Abstract
The diagrid structural systems are mainly used for their structural capabilities and architectural aesthetic possibilities which are provided by the unique geometric configurations of these systems. However, the seismic performance factors of these structural systems are not yet explicitly recommended in the existing building codes. In this study, the seismic performance factors (SPFs) of 6- to 24-story steel diagrid structures are determined considering the post-buckling behavior of diagonal members in compression. Also, the effect of change in span length and the diagonal angles on the SPFs of diagrid structures is studied. The ATC-19 coefficient method is used for calculating the SPFs...