نتایج جستجو برای: acceleration control

تعداد نتایج: 1370097  

Journal: :computational methods in civil engineering 2012
a. varasteh f. behnamfar m. salimi

an enhanced displacement feedback structural control procedure is presented for performance-based design in this paper. at first, a comparative study is implemented assessing three most common active control algorithms including state, acceleration, and displacement feedback controls. the advantage of the displacement feedback algorithm for active control of structures against earthquakes is de...

Journal: :international journal of optimaization in civil engineering 0
m. mohebbi h. dadkhah

semi-active base isolation system has been proposed mainly to mitigate the base drift of isolated structures while in most cases, its application causes the maximum acceleration of superstructure to be increased. in this paper, designing optimal semi-active base isolation system composed of linear base isolation system with low damping and magneto-rheological (mr) damper has been studied for co...

Journal: :Transactions of the Society of Instrument and Control Engineers 1994

H. Dadkhah, M. Mohebbi,

Semi-active base isolation system has been proposed mainly to mitigate the base drift of isolated structures while in most cases, its application causes the maximum acceleration of superstructure to be increased. In this paper, designing optimal semi-active base isolation system composed of linear base isolation system with low damping and magneto-rheological (MR) damper has been studied for co...

Journal: :civil engineering infrastructures journal 0
hessamoddin meshkat razavi ph.d. candidate, department of civil engineering, faculty of engineering, ferdowsi university of mashhad, mashhad, iran hashem shariatmadar associated professor, department of civil engineering, faculty of engineering, ferdowsi university of mashhad, mashhad, iran

this study is investigated the optimum parameters for a tuned mass damper (tmd) under the seismic excitation. shuffled complex evolution (sce) is a meta-heuristic optimization method which is used to find the optimum damping and tuning frequency ratio for a tmd. the efficiency of the tmd is evaluated by decreasing the structural displacement dynamic magnification factor (ddmf) and acceleration ...

Journal: Physical Treatments 2017

Purpose: Predicting body Center of Mass (COM) acceleration is carried out with more accuracy based on the acceleration of three joints of lower limb compared to only accounting joints of hip and ankle. Given that trunk movement during quite standing is noticeable, calculating trunk acceleration in model might increase prediction accuracy of COM acceleration. Moreover, in previous research studi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی عمران 1385

بیش از سه دهه است که توجه زیادی در خصوص استفاده از سیستمهای محافظ سازه ای ایجاد شده است که به منظور کاهش اثرات خطرات محیطی از قبیل زلزله و بادهای شدید بر سازه های مهندسی عمران می باشد این سیستمها معمولا دستگاههای میرایی تکمیلی را برای افزاش اتلاف انرژی سازه محافظت شده بکار می برند یکی از نویدبخش ترین دستگاههای پیشنهادی جدید برای محافظت سازه ای میراگرهای سیال مغناطیسی کنترل پذیر هستند از مهمترین...

A. Varasteh F. Behnamfar, M. Salimi

An enhanced displacement feedback structural control procedure is presented for performance-based design in this paper. At first, a comparative study is implemented assessing three most common active control algorithms including state, acceleration, and displacement feedback controls. The advantage of the displacement feedback algorithm for active control of structures against earthquakes is de...

Journal: :CoRR 2017
Kaihua Xi Hai Xiang Lin Chen Shen Jan H. van Schuppen

This paper focuses on secondary frequency controlof large-scale power systems. First a centralized and a consen-sus control based distributed control law are presented, thena multi-level control law, named Multi-Level Power-ImbalanceAllocation Control (MLPIAC), for the large-scale power systemspartitioned into more than one region. The centralized anddistributed control ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی عمران 1383

سازه های عمرانی در طول عمر مفید خود در برابر بارهای محیطی دینامیکی مثل باد و زلزله قرار می گیرند که باید در برابر آنها مقاومت نمایند. پیشرفت علم و بوجود آمدن سیستم های کنترلی باعث گسترش این سیستم ها در حیطه ساختمان گردیده است. سیستم ها و روش های مختلفی در زمینه کنترل در ساختمانها ارایه شده است که بسیاری از آنها در مرحله تحقیق و بررسی و تعدادی از آنها بصورت عملی در ساختمانها اجرا شده است. در این...

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