**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**11

# smart structure Related Publications

##### 11 Hybrid Stainless Steel Girder for Bridge Construction

**Authors:**
Tetsuya Yabuki,
Yasunori Arizumi,
Tetsuhiro Shimozato,
Samy Guezouli,
Hiroaki Matsusita,
Masayuki Tai

**Abstract:**

The main object of this paper is to present the research results of the development of a hybrid stainless steel girder system for bridge construction undertaken at University of Ryukyu. In order to prevent the corrosion damage and reduce the fabrication costs, a hybrid stainless steel girder in bridge construction is developed, the stainless steel girder of which is stiffened and braced by structural carbon steel materials. It is verified analytically and experimentally that the ultimate strength of the hybrid stainless steel girder is equal to or greater than that of conventional carbon steel girder. The benefit of the life-cycle cost of the hybrid stainless steel girder is also shown.

**Keywords:**
corrosion prevention,
smart structure,
ultimate strength,
hybrid stainless steel members,
steel bridge

##### 10 Modeling, Analysis and Control of a Smart Composite Structure

**Authors:**
Nader H. Ghareeb,
Mohamed S. Gaith,
Sayed M. Soleimani

**Abstract:**

In modern engineering, weight optimization has a priority during the design of structures. However, optimizing the weight can result in lower stiffness and less internal damping, causing the structure to become excessively prone to vibration. To overcome this problem, active or smart materials are implemented. The coupled electromechanical properties of smart materials, used in the form of piezoelectric ceramics in this work, make these materials well-suited for being implemented as distributed sensors and actuators to control the structural response. The smart structure proposed in this paper is composed of a cantilevered steel beam, an adhesive or bonding layer, and a piezoelectric actuator. The static deflection of the structure is derived as function of the piezoelectric voltage, and the outcome is compared to theoretical and experimental results from literature. The relation between the voltage and the piezoelectric moment at both ends of the actuator is also investigated and a reduced finite element model of the smart structure is created and verified. Finally, a linear controller is implemented and its ability to attenuate the vibration due to the first natural frequency is demonstrated.

**Keywords:**
Piezoelectricity,
smart structure,
active linear control,
lyapunov stability theorem,
static deflection

##### 9 Numerical Investigation of Poling Vector Angle on Adaptive Sandwich Plate Deflection

**Authors:**
Alireza Pouladkhan,
Mohammad Yavari Foroushani,
Ali Mortazavi

**Abstract:**

This paper presents a finite element model for a Sandwich Plate containing a piezoelectric core. A sandwich plate with a piezoelectric core is constructed using the shear mode of piezoelectric materials. The orientation of poling vector has a significant effect on deflection and stress induced in the piezo-actuated adaptive sandwich plate. In the present study, the influence of this factor for a clamped-clamped-free-free and simple-simple-free-free square sandwich plate is investigated using Finite Element Method. The study uses *ABAQUS* (*v.6.7*) software to derive the finite element model of the sandwich plate. By using this model, the study gives the influences of the poling vector angle on the response of the smart structure and determines the maximum transverse displacement and maximum stress induced.

**Keywords:**
Piezoelectric materials,
Finite Element Method,
sandwich plate,
poling vector,
smart structure,
electric enthalpy

##### 8 Controller Design for Euler-Bernoulli Smart Structures Using Robust Decentralized FOS via Reduced Order Modeling

**Authors:**
T.C. Manjunath,
B. Bandyopadhyay

**Abstract:**

**Keywords:**
Vibration Control,
Finite Element Method,
smart structure,
Euler-Bernoulli beam theory,
model order reduction,
LMI,
Fastoutput sampling feedback control,
Statespace model

##### 7 Modeling and FOS Feedback Based Control of SISO Intelligent Structures with Embedded Shear Sensors and Actuators

**Authors:**
T. C. Manjunath,
B. Bandyopadhyay

**Abstract:**

**Keywords:**
Vibration Control,
State Space Model,
Finite Element Method,
smart structure,
SISO,
LMI,
Timoshenko beam theory,
Fast output sampling feedback control

##### 6 Vibration Suppression of Timoshenko Beams with Embedded Piezoelectrics Using POF

**Authors:**
T. C. Manjunath,
B. Bandyopadhyay

**Abstract:**

**Keywords:**
Vibration Control,
State Space Model,
Finite Element Method,
smart structure,
SISO,
Timoshenko beam theory,
Embedded sensors and actuators,
Periodic
output feedback control

##### 5 Development of New Control Techniques for Vibration Isolation of Structures using Smart Materials

**Authors:**
Shubha P Bhat,
Krishnamurthy,
T.C.Manjunath,
C. Ardil

**Abstract:**

**Keywords:**
Vibration,
Isolation,
Earthquakes,
space structures,
acceleration,
smart structure,
excitation,
DOF

##### 4 Control of Vibrations in Flexible Smart Structures using Fast Output Sampling Feedback Technique

**Authors:**
T.C. Manjunath,
B. Bandyopadhyay

**Abstract:**

**Keywords:**
Vibration Control,
Finite Element Method,
smart structure,
LMI,
State spacemodel,
Euler-Bernoulli theory,
SISO model,
Fast output sampling

##### 3 Multivariable Control of Smart Timoshenko Beam Structures Using POF Technique

**Authors:**
T.C. Manjunath,
B. Bandyopadhyay

**Abstract:**

**Keywords:**
Vibration Control,
State Space Model,
Finite Element Method,
smart structure,
Timoshenko theory,
Euler-Bernoulli
theory,
Periodic output feedback control,
Multivariable system,
Linear
Matrix Inequality

##### 2 Controller Design for Euler-Bernoulli Smart Structures Using Robust Decentralized POF via Reduced Order Modeling

**Authors:**
T.C. Manjunath,
B. Bandyopadhyay

**Abstract:**

**Keywords:**
Vibration Control,
Finite Element Method,
smart structure,
Euler-Bernoulli beam theory,
SISO,
Periodic output feedback control,
Reduced Order Model,
State space
model,
Embedded sensors and actuators

##### 1 Mathematical Modeling of SISO based Timoshenko Structures – A Case Study

**Authors:**
T.C. Manjunath,
Student Member,
B. Bandyopadhyay

**Abstract:**

This paper features the mathematical modeling of a single input single output based Timoshenko smart beam. Further, this mathematical model is used to design a multirate output feedback based discrete sliding mode controller using Bartoszewicz law to suppress the flexural vibrations. The first 2 dominant vibratory modes is retained. Here, an application of the discrete sliding mode control in smart systems is presented. The algorithm uses a fast output sampling based sliding mode control strategy that would avoid the use of switching in the control input and hence avoids chattering. This method does not need the measurement of the system states for feedback as it makes use of only the output samples for designing the controller. Thus, this methodology is more practical and easy to implement.

**Keywords:**
Vibration Control,
State Space Model,
Finite Element Method,
mathematical model,
smart structure,
SISO,
Timoshenko beam theory,
Discretesliding mode control,
Bartoszewicz law