Dolagobinda Padhan
@griet.ac.in
Professor and EEE Department
Gokaraju Rangaraju Institute of Engineering and Technology
EDUCATION
Ph.D. (IIT Guwahati)
RESEARCH INTERESTS
Field of Interests: Process Identification & Auto-tuning Control Theory Applications Soft Computing Electric Vehicles UAV, UGV, UWV , Time delay systems Control Structures, Controllers design and tuning
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Dola Gobinda Padhan, Sai Nikhila Varma, Venkateshwari C, Marakala Divya, Suguna Manasa, and B Pakkiraiah
IEEE
Security systems serve the major functions of protection and safety. Home security is a major predicament in today's world. It is proven that facial recognition, which is a relatively new technology, is the most efficient way of providing security. The high-end security systems used today are very expensive and use biometrics like fingerprint or iris scanners. These systems require additional equipment for recognition which can be replaced by a simple camera while using facial recognition. Our project is aimed at creating an efficient security system incorporating the concepts of Artificial Intelligence (AI) and Machine Learning (ML) to implement facial recognition. Histograms of Oriented Gradients is the algorithm used for facial recognition. The usage of doorbells is also uprooted to attain a more automated approach to detecting the presence of someone at the door by using facial detection. The above goals are carried out with the use of OpenCV, Imutils and Dlib libraries in Python, with a Raspberry Pi as the processing unit of the security system. The door lock, controlled by a stepper motor, operates immediately once the person detected is recognized. Application of the Internet of Things (IoT) and the Global System for Mobile Communications (GSM) is also incorporated in the situation when the detected person is not recognized.
Satyabrata Sahoo, V. Mahesh, Bharath Kumar Narukullapati, Idamakanti Kasireddy, Dola Gobinda Padhan, and D S Naga Malleswara Rao
IEEE
Now a day, teacher centric approach in engineering education is gradually replaced with the new student centric pedagogy through active learning technique. This paper presents an effective and wide spread active learning process i.e. Project Based Learning (PBL) for control system engineering subject of electrical and electronics engineering discipline through MATLAB. Presently it is very difficult to attract the student’s attention towards the core theory subject. Here through Project Based Learning with MATLAB implementation we want to enhance the students’ performance overall. In this learning methodology, students are able to learn by implementing and interacting with each other. The objective of this paper is to enable the students for team work, problem solving ability, and leadership quality. Finally the student’s outcome of this project based learning is implemented through student’s feedback and internal assessment through presentation and mid examination.
Dola Gobindha Padhan, Dogga Raveendhra, Satyabrata Sahoo, and V. Mahesh
IEEE
The performance analysis of Fuzzy and PR controllers for single phase H bridge inverters is presented in this paper. In this method only two decoupling capacitors are used which transfer power ripple towards this decoupling capacitor not effecting the output voltage of the inverter. The key role in this paper is that we are not using any extra power semiconductors devices except the H Bridge. The regulation of load current is one of the most important aspects of inverter control. The fuzzy controller has drawbacks such as regular upgrades are needed, dependent on human intelligence etc. In order to overcome this drawbacks PR controller is used. Performance analysis of fuzzy controller has been carried out in this study by simulation and compared with PR controller. Moreover, total harmonic distortion (THD) of the PR controller was less compared by the fuzzy controller. MATLAB/Simulink is used to test the system performance.
Manisha Kumari, Tavanam Venkata Rao, S. Arun Jayakar, D. Srinivas, Dola Gobinda Padhan, A. Kishore Reddy, P. Rahul Reddy, and Amanuel Diriba Tura
Hindawi Limited
A pattern reconfigurable dielectric resonator antenna emitting at 3.1 GHz is presented in this study. The beam can be steered at 6 degrees, 8 degrees, 14 degrees, and 171 degrees. Three P-i-N diodes are employed in the slots of the ground plane to help steer the beam direction. By changing the state of the three diodes, five states can be obtained. The TE01δ mode is excited using a differential feed technique. Differential feed helps in increasing the gain and reducing the size of the structure. The return loss of each state is less than −25 dB. The gain of the first state is 7.65 dBi, the second and fifth state’s gain is 8.22 dBi, third and fourth state’s gain is 10.6 dBi. This Antenna is designed using Rogers RO4003C material which has low Electrical gravity, low voltage, and high oxidation resistance that makes it appropriate for RF applications. The properties required for RF microwave circuits, matching networks, and controlled impedance transmission lines are present in the RO4003C material. Annealed copper is used for designing the ground plane and feedline which provides excellent conductivity. The antenna is fabricated using the chemical etching process which employs a positive photoresist that gives a higher resolution accuracy for the designed antenna. This process of fabrication has another advantage of inculcating structures from simpler to complex.
Padmalaya Nayak, GK. Swetha, Priyanka Kaushal, and D. G. Padhan
Springer Singapore
More Anusha, Dola Gobinda Padhan, and D. Karuna Kumar
EDP Sciences
The main work focus is on the LCC HVDC reactive power control system with fluid regulated AC voltage. The reactive power and the voltage control capacity of LCC HVDC were examined and demonstrated with controlled condensers. Reactive power control and voltage management have been suggested and associated controllers with variable condensers have been developed on the reverse side of the fuzzy controlled LCC HVDC system. The active corrective side power control is required and a reactive or voltage control has been taken into account in this work. This study looks at the inverter side of the system LCC HVDC with customizable capacitors, reactive power and fluid management of the AC voltage. The usual AC voltage control and PI controller for reactive power is replaced by an injected controller that enhances reaction speed and control. In the MATLAB software with Sim-Power system toolbox, graphs are created using a GUI environment to model the proposed fuzzy-controlled HVDC system.
Choppadandi Srikanth, Dola Gobinda Padhan, and N. Kiran Kumar
EDP Sciences
The FOPID control units for an AVR system with a fractional filter are a unique fractional order. The main responsibility for controlling the reactive power and voltage level is an automated tensile regulator (AVR). PID controller, sensor, exciter, and stabiliser or amplifier are used for the module system. The system is designed according to state-space technology. The proposed controller must have seven independent parameters. A comparison of the published study with optimal adjusted AVR PID and FOPID controls also shows that the proposed controller is superior. The recommended controls derived from the bode analysis with their frequency response characteristics are shown. Finally, the resilience of the controller design is individually examined for both the parameter uncertainties of AVR system and outside storages introduced into AVR system. Given the overall results presented there are clear improvements to the performance of AVR system by a fractional filter in a proposed FOPID controller, and that the AVR system may successfully be applied to the suggested control.
Veena Trivedi, Padmalaya Nayak, D. G. Padhan, and Neeraj Mohan
IEEE
Routing in Mobile Ad-hoc Networks (MANETs) has gained gigantic attention due to the mobility of nodes, standalone infrastructure, and lack of a centralized arbitrator. These moving nodes make the routing technique highly complex and unstable within a limited radio range. When the network size increases, the length of the complete path increases, and the header size of data packets also increase which brings the network slowdown in operation. To address these issues, many researchers have explored many Artificial Intelligence (AI) techniques to route the data packets from the source to the destination. This paper aims to develop a new routing protocol that exploits the principle of genetic algorithm to find the shortest path from source to the destination. The proposed protocol is experimented through the ns-2 simulator and proves its maximum efficiency over traditional AODV protocol in terms of throughput, average residual energy, and extends the network lifetime at crossover probability 0.5.
Konangi Radhika, Kiran Kumar Nallamekala, K. Venkatraman, and D.G. Padhan
IEEE
This paper introduces a 3$-\\emptyset$ transformerless multilevel inverter fed induction motor drive for agricultural applications. The new platform utilizes a smooth transmitter and removes the current leakage by maintaining a constant normal voltage level. The proposed multi-level inverter has the advantage of low harmonic distortion, low dv/dt and less instantaneous errors. As the input DC power is taken from the PV system, complexity will not be increased even though required number of isolated DC voltages for the multilevel inverter is increasing. The reliability of the system will be increased as power is taken from PV system. The performance of induction motor fed with the proposed inverter is analyzed by applying three types of level shifted sine triangle pulse width modulation techniques PD, POD, APOD. In addition, the proposed topology is able to provide reactive energy to the grid when it connected with grid. The simulation results of the proposed topology are presented to illustrate the performance of the proposed system.
Rithvik Reddy Adapap, Syed Sarfaraz Nawaz, and Dola Gobinda Padhan
IEEE
This paper analyses different types of coil systems to produce volumes of uniform magnetic field. The square spiral coils are easier to implement than the circular ones. In this paper, a new analytical calculation for magnetic flux density of the spiral coils is presented, which is simpler than the greenhouse method. This paper presents a comparative study of the magnetic field distribution for circular and square coils. The magnetic flux density is obtained using the Biot- Savart’s law, furthermore a detailed analysis is performed in order to obtain simple mathematical expressions that relate the area, with uniform magnetic field, to the length of the different coils and number turns of the coils. Two adaptations of the Biot- Savart’s law are developed in this paper which offer a means of calculating the flux density given the position of interest, the coil geometry, and the amount current passing through the coil. The calculation of the magnetic flux density using analytical formulas and finite element simulations are compared. Finally, a cube volume of uniform magnetic field in each coil is calculated. In this paper magnetic flux densities are determined for different currents at various locations for circular coil as well as square coil. Computational models are constructed and simulated using ANSYSS Maxwell software in order to validate the calculated results of the magnetic field distribution of each geometry considering similar parameters.
Rithvik Reddy Adapa, Syed Sarfaraz Nawaz, and Dola Gobinda Padhan
IEEE
This paper analyzes different types of coil systems to produce volumes of uniform magnetic field. The square spiral coils are easier to implement than the circular ones. In this paper, a new analytical calculation for magnetic flux density of the spiral coils is presented, which is simpler than the greenhouse method. This paper presents a comparative study of the magnetic field distribution for circular and square coils. The magnetic flux density is obtained using the Biot-Savart law, furthermore a detailed analysis is performed in order to obtain simple mathematical expressions that relate the area, with uniform magnetic field, to the length of the different coils and number turns of the coils. Two adaptations of the Biot-Savart's law are developed in this paper which offer a means of calculating the flux density given the position of interest, the coil geometry, and the amount current passing through the coil. The calculation of the magnetic flux density using analytical formulas and finite element simulations are compared. Finally, a cube volume of uniform magnetic field in each coil is calculated. In this paper magnetic flux densities are determined for different currents at various locations for circular coil as well as square coil. Computational models are constructed and simulated using MATLAB software in order to validate the calculated results of the magnetic field distribution of each geometry considering similar parameters.
Kunduru Laxmi Pavan Kumar Reddy and Dola Gobinda Padhan
EDP Sciences
The main objective of power system operation and control is to maintain the continuity of supply with required quality and reliability. In power system operation one of the issue is Load frequency control. Generally, the dynamics of the system ( i.e the over all dynamics of governor ,turbine, load and machine) for isolated or inter-connected power system is of higher order. The controller design for a higher order system is a tedious process. In order to over come this difficultly relay feedback identification approach has been adopted. In this approach the higher order system has been reduced to lower order system by the method of IMC-PID tuning control. Robust controller has been design for identified model for single area power system in order to achieve satisfactory closed loop performance. The same concepts have been readily extended to multi area power system.
Dola Gobinda Padhan, Syed Sarfaraz Nawaz, and Padmanabhuni Ravikanth
EDP Sciences
The Grey Wolf Optimization (GWO) is well known meta-heuristic algorithm and has been previously used for optimization of various conventional PID and FOPID controllers. This paper deals with the application of Grey Wolf Optimizer (GWO) algorithm and internal model control (IMC) for optimization of fractional order PID (FOPID) controller parameters to the load disturbance of system. This is applicable for one (or) single area non reheated electrical system. The simulation results are compared with the non re-heated Big Bang Big Crunch (BBBC) optimization outputs. In this paper, BBBC optimization has the two bounding cases (lower & upper), they are before and after the perturbation cases. Also it is observed that in case of the BBBC output responses, the settling time value of load frequency is more when compared with the GWO. From the simulation results it is concluded that GWO out performs as compared with BBBC as it produces less error and settling time.
Dola Gobinda Padhan and Suresh Kumar Tummala
Institute of Advanced Engineering and Science
<p>A novel control structure for designing a PID load frequency controller for power systems is presented. The controller with a single tuning parameter is designed based on a desired closed-loop complementary sensitivity function and Pade approximation. Comparative analysis demonstrates that proposed PID controllers improves the settling time and reduces overshoot effectively against small step load disturbances. Also, the performance and robustness of the controllers have been analyzed and compared. Simulation results show significantly improved performances when compared with recent results.</p>
Vasampalli Shashidhar and Dola Gobinda Padhan
EDP Sciences
This paper proposes a novel fractional order PID control scheme for Multi Input and Multi Output (MIMO) power systems. This control scheme utilizes Cuckoo Search algorithm to tune the fractional PID controller to guarantee better closed loop performance in the transmission or distribution networks. Cuckoo Search optimization algorithm is proposed to optimize gain values of the fractional PID controller. The effectiveness of the proposed control strategy has been assessed by simulations in MATLAB/Simulink platform. The robustness of the proposed controller has been validated by varying the plant parameters.
B S Durga Kameswari and Dola Gobinda Padhan
EDP Sciences
This paper introduces a series cascade control structure for automatic generation control. The control structure consists of two loops such as Primary loop and auxiliary loop (secondary loop). The secondary loop controller is designed using internal model control (IMC) approach. The primary loop controller is a PID controller which is tuned using desired complimentary sensitivity function. The beauty of the control structure is that it effectively nullifies the disturbances entering to the secondary loop as well as primary loop. The efficacy of the proposed controller is shown by comparing the simulation results with the existing methods in the literature.
N. Arun Vignesh, Shilpa Bagade, Sreehari Veeramachneni, T.Suresh Kumar, and DG Padhan
IEEE
A novel platelike inverted leaf antenna is given. The traditional monopole antenna has been replaced with platelike structure. On top of the bottom plane, an antenna with semi elliptical base with an inverted cone is put in. The divergent part has 3 holes and is delineated as having a ‘leaf’ form. The necessity for raised information speeds and multiband operations of wireless communication systems motivated for the demand of broadband antennas which might support such desires. The radiation properties like information measure, polarization, and gain area unit desired maintaining price effective systems. Within the horizontal plane, the most issues, that’s moving is that the size of the bottom plane. The dimensions of the antenna is formed compact with the addition of 3 holes which boosts the information measure. The feeding mechanism of antenna is completed by coax via a surface mounted adapter instrumentation (SMA). The results show that the planned antenna provides a minimum of 13:1 electrical phenomenon information measure at 10-dB come back loss.
DG Padhan, T Suresh Kumar, V Sreehari, and N Arun Vignesh
IEEE
This paper proposes a hybrid tuning rule of a fractional order PID controller $(\\mathrm{PI}^{\\lambda}\\mathrm{D}^{\\mu})$ for a Second Order process with time delay. Out of the five tuning parameters (proportional gain $(\\mathrm{K}_{\\mathrm{p}})$, integral gain (Ki), derivative gain $(\\mathrm{K}_{\\mathrm{d}}), \\lambda,\\mu)$ of the proposed controller, the first three parameters are tuned with available tuning method. Two non-linear equations are derived from finding the non-integer order of the integral term $(\\lambda)$ and derivative term (μ), The proposed hybrid tuning method is compared with other existing PID tuning rules to prove the efficacy of the technique. Robustness analysis has been carried out using edge theorem. From the simulation results, it is observed that the proposed controller gives asuperiorclosed-loop performance as compared to some existing tuning methods in the literature.
T. Suresh Kumar, DG Padhan, V Sreehari, and N Arun Vignesh
IEEE
Use of electrical motor is inexorable in contemporary and control of the electrical motor is essential in all most all practical applications. There is a tremendous increase in demand for permanent magnet drives which have convenient characteristics like lesser energy costs, optimal performance, reduced acoustic noise and more. The traditional machines like single-phase AC induction, including split phase, capacitor-start, etc. cannot provide the above features. Among these PMSM applications used in every part of the market such as consumer appliances, industrial control, and automation, aviation, etc. These PM drives are helpful as variable speed drives with reasonable accuracy. The problems encountered with these motors for variable speed operation eliminates with the advancements in technology in the fields of power semiconductors, microprocessors, adjustable speed drive control schemes. These improvements have been combined to enable reliable, cost-effective solution for a broad range of flexible speed applications. This paper deals with speed control of PMSM in the closed loop which is simulated & developed using DSP 2407. The mathematical model of PMSM, using modeling capabilities of Simulink is implemented. Other hands, a hardware implementation of such systems using DSP plays a vital role in speed control methodologies.
Dola Gobinda Padhan and Suresh Kumar Tummala
IEEE
This paper introduces a Cuckoo Search Fractional Order PID (CSFOPID) controller outline for a Magnetic Levitation System (MLS). The MLS unit, lifting of items under the influence of an attractive field is a nonlinear inalienably shaky framework. Physically, it is extremely difficult for modifying the current in the electromagnet to keep an attractive question suspended in air. Indeed, even a criticism control with forwarding way gain control alone is ineffectual. It is required to plan a reasonable controller and actualize the same to accomplish the coveted target. Hence, PID, FOPID and CSFOPID controllers are proposed to settle the MLS unit. To enhance the shut circle execution and power, CSFOPID controllers are a great decision. The proposed controller conveys the MLS to a steady district by keeping an attractive barrel suspended noticeable all around. The simulation and test results acquired confirm that the proposed controller can balance out the attractive levitation framework and give power to demonstrating vulnerabilities. The simulation consequences of CSFOPID controller is additionally contrasted and those of PID and FOPID controllers with a specific end goal to demonstrate the efficacy of the controller.
Anusha Alluri, Dola Gobinda Padhan, and Praveen Jugge
IEEE
Present trend in power system steady state analysis is to account for the existing uncertainties in the system parameters. With the increased installations of renewable energy resources, robust analysis methodologies and techniques are needed to counter the power system operation and planning challenges. Probabilistic power flow (PPF) has been identified as an efficient tool for power system analysis under uncertainty. This paper commemorates the PPF using point estimate methods (PEM). Two schemes of PEM (2m and 3m) are presented and their performance in solving PPF is evaluated by comparing it to the Monte-Carlo based PPF. PEM-PPF has been tested in both meshed transmission system (30-Bus) and radial distribution system (33-Bus) for its performance. Results have been discussed and PEM is shown to be better performing for radial networks. A new probability density function (PDF) recovery method of Johnson distribution system is used to approximate the PDF of output random variables.
Dola Gobinda Padhan and B. Rajagopal Reddy
IEEE
This paper presents a new tuning rule for series cascade control scheme for open loop stable and integrating process models with time delay. A filter dead time compensator scheme has been incorporated in the primary loop of series cascade control structure to improve the servo response and regulatory response. Internal Model Control approach has been used to design the secondary loop controller. Routh Hurwitz stability criterion is used to design the primary loop controller. To select the time constants of the filters, guidelines are provided. Simulation results demonstrate the satisfactory closed loop performance for both nominal and perturbed process parameters of the proposed method.
Dola Gobinda Padhan and Somanath Majhi
Elsevier BV
Dola Gobinda Padhan and Somanath Majhi
Elsevier BV
Dola Gobinda Padhan and Somanath Majhi
Elsevier BV