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Vibration Control of A Thin Walled Composite Beam Using PID Control Technique
T.C. Manjunath,IIT Bombay,Sheelarani T B,C B Vinutha,M Z Kurien 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper features the modeling and design of a PID controller to control the vibrations of a smart thin walled composite box beam. Collocated piezoelectric patches are bonded as sensor / actuator to the master structure at a certain finite element location on the beam, i.e., nearby the fixed end of the composite box beam. The beam structure is modeled in the state space form using the concept of piezoelectric theory, the Timoshenko beam theory and the Finite Element Method. The beam is subjected to an external disturbance (say, impulse or sine or random excitation). A novel PID controller is designed for the smart composite box beam. When the designed controller is put in the loop with the plant, i.e., the smart structure plant, the plant performs well and the vibrations are damped out in a quicker time. The performance of the designed controller is thus evaluated for vibration control and the conclusions are here by drawn. The simulation results show the effectiveness of the developed method. This is the main objective of this paper.
T.C.Manjunath,IITBombay,Sheelarani TB,CB Vinutha,MZ Kurien 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
A novel chebyshev filter is designed in this paper and is used for reduction of the noises in the captured input signals which is further used for processing in the smart systems architecture,i.e., in the active vibration control of smart structures. This is the main objective of this paper.
Best location for placement of collocated sensor / actuator pair on smart systems
T.C. Manjunath,IIT Bombay,Sheelarani T B,C B Vinutha,M Z Kurien 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Active vibration control is an important problem in structures. One of the ways to tackle this problem is to make the structure smart & intelligent by making use of certain materials called as smart materials (piezoelectrics, shape memory alloys, electrorheological fluids, PVDF, etc.). This paper features the mathematical modeling of a single input single output based Euler-Bernoulli smart beam & the usage of this mathematical model to suppress the active vibrations in it using 2 types of control laws, viz., the periodic output feedback control law & the fast output sampling feedback control law. The active vibration control concept along with the best location for the placement of the sensor / actuator pair on the smart systems is compared herewith & the conclusions are drawn. This is the main objective of this paper.
Modeling and fast output sampling feedback control of a smart Timoshenko cantilever beam
Manjunath, T. C.,Bandyopadhyay, B. Techno-Press 2005 Smart Structures and Systems, An International Jou Vol.1 No.3
This paper features about the modeling and design of a fast output sampling feedback controller for a smart Timoshenko beam system for a SISO case by considering the first 3 vibratory modes. The beam structure is modeled in state space form using FEM technique and the Timoshenko beam theory by dividing the beam into 4 finite elements and placing the piezoelectric sensor/actuator at one location as a collocated pair, i.e., as surface mounted sensor/actuator, say, at FE position 2. State space models are developed for various aspect ratios by considering the shear effects and the axial displacements. The effects of changing the aspect ratio on the master structure is observed and the performance of the designed FOS controller on the beam system is evaluated for vibration control.
Modeling and fast output sampling feedback control of a smart Timoshenko cantilever beam
B. Bandyopadhyay,T.C. Manjunath 국제구조공학회 2005 Smart Structures and Systems, An International Jou Vol.1 No.3
This paper features about the modeling and design of a fast output sampling feedback controller for a smart Timoshenko beam system for a SISO case by considering the first 3 vibratory modes. The beam structure is modeled in state space form using FEM technique and the Timoshenko beam theory by dividing the beam into 4 finite elements and placing the piezoelectric sensor/actuator at one location as a collocated pair, i.e., as surface mounted sensor/actuator, say, at FE position 2. State space models are developed for various aspect ratios by considering the shear effects and the axial displacements. The effects of changing the aspect ratio on the master structure is observed and the performance of the designed FOS controller on the beam system is evaluated for vibration control.
Abbar, Jyothi C.,Meti, Manjunath D.,Nandibewoor, Sharanappa T. The Korean Electrochemical Society 2018 Journal of electrochemical science and technology Vol.9 No.4
The electrocatalytic oxidative behavior of an antiarrhythmic drug, procainamide hydrochloride (PAH) at the gold electrode surface has been examined using different voltammetric methods like cyclic, linear-sweep and differential pulse voltammetry. Voltammograms obtained in this study reveal that the electrode exhibit excellent electrocatalytic activity towards oxidation of the drug. The parameters that can affect the peak current at different pH, scan rate and concentration were evaluated. The number of electrons transferred was calculated. The current displayed a wide linear response ranging from 0.5 to $30.0{\mu}M$ with a limit of detection of 56.4 nM. The impact of potential interfering agents was also studied. The electrode displayed wide advantages such as simple sample preparation, appreciable repeatability, reproducibility and also high sensitivity. Furthermore, the feasibility of the proposed method was successfully demonstrated by determining PAH in the spiked human biological sample.