Qualification: 
Ph.D, M.Tech
Email: 
k_sreeja@blr.amrita.edu

Dr. Sreeja Kochuvila is currently serving as Assistant Professor and Vice-Chair in the Department of Electronics and Communication Engineering. She has over 14 years of teaching experience in various institutions. She holds Ph. D. degree in Engineering from Amrita Vishwa Vidyapeetham and has several peer reviewed journal and conference publications.

Education

  • Ph. D. in Engineering (Area: Robotics and Control)
    Amrita Vishwa Vidyapeetham
  • M. Tech in Instrumentation and Control Systems
    NIT, Calicut
  • B. Tech. in Electrical and Electronics Engineering
    M. G. University, Kerala

Professional Appointments

Year Affiliation
2016 – Till Date Assistant Professor (Senior Grade)
Department of Electronics and Communication Engineering, Amrita school of Engineering, Bengaluru
2006 – 2013 Assistant Professor (Senior Grade)
Department of Electrical and Electronics Engineering, Amrita School of Engineering, Bengaluru
2005 – 2006 Lecturer
Department of Electrical and Electronics Engineering, New Horizon College of Engineering, Bengaluru
1998 – 2000 Lecturer
Department of Electrical and Electronics Engineering, Government College of Engineering, Thrissur, Kerala
1997 – 1998 Lecturer
Department of Electrical and Electronics Engineering, Government College Of Engineering, Trivandrum, Kerala

Membership in Professional Bodies

  • Member – IEEE, RAS

Publications

Publication Type: Conference Paper

Year of Publication Title

2021

L. Thanmayi A. V., Reddy, S. Dharahas, and Dr. Sreeja Kochuvila, “Detection of Leukemia using K-means Clustering and Machine Learning”, in 4th EAI International Conference on Ubiquitous Communications and Network Computing (UBICNET), Department of ECE, Amrita School of Engineering, Bengaluru., 2021.

2021

Sreyas S., Dr. Sreeja Kochuvila, S. Vignesh, and Pranav R., “AIR TOUCH: Human Machine Interface Using Electromyography Signals”, in Easton 100 – 5th International Conference on Computing Sciences, organized by Advanced Computing Research Society, 2021.

2019

D. S, Amarnath, A., U, G., and Dr. Sreeja Kochuvila, “Survey on Range Prediction of Electric Vehicles”, in i-PACT-2019, Vellore Institute of Technology, Tamil Nadu, India, 2019.

2019

G. Shrinidhi, M, D. Subramania, Rajesh, G., and Dr. Sreeja Kochuvila, “Enhancement of Electrical Distribution System-Load levelling”, in 2019 International Conference on Intelligent Computing and Control Systems (ICCS), Madurai, India, 2019.[Abstract]


The advent of vast technological developments has led to a drastic increase in the demand of stable electrical power supply. The direct consequence of this is the need to introduce efficient methods of transferring electricity to loads. These efficient methods are very advantageous in terms of reducing power loss and ensuring that the power supply is steady and meets with the demand. There are many solutions that result in efficient supply of power to the loads by means of rearrangement of loads and a loads' split such that each phase has a levelled load condition. There are various methods to perform this split of loads which also includes smart ways of levelling. Smart Load levelling is an automated and intelligent method of addressing the problem. This paper deals with one optimum solution that addresses the problem of uneven load distribution among the three phases of an Electrical Distribution Network. The solution is Automatic Load Levelling using Fuzzy Logic Approach. The system under consideration is that which consists of six loads with equal number distribution per phase (i.e. two loads per phase), and also generalized cases of N loads with equal number distribution per phase and unequal number distribution per phase. The methodology presented in the paper addresses all kinds of unlevelled conditions for a single phase AC system.

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2019

C. Prasad, V Balakandan, K., V, P. Moorthy, and Dr. Sreeja Kochuvila, “Classification of sEMG Signals for Controlling of a Prosthetic foot using SVM and KNN”, in 2019 International Conference on Intelligent Computing and Control Systems (ICCS), Madurai, India, 2019.[Abstract]


Prosthesis plays an important role in rehabilitation. Majority of the powered prosthetic foot available for Trans-tibial amputees (TTA) today take the signal for the control action of the prosthetic foot from the residual stump. Bio-signals from the Biceps Femoris muscle of the thigh is found to be more stable as compared to signals from other thigh muscles and is found to have a reduced metabolic rate during the gait cycle. This study is done on the surface EMG signal measurements of 20 healthy subjects obtained using muscle sensor and conclusions as to which feature extraction technique of the EMG signal is accurate to classify 1-Degree of Freedom (DoF) - dorsiflexion and plantar flexion are derived using weighted KNN and Linear SVM classifier. The comparison of the accuracy of the two classifiers showed that weighted KNN has better efficiency.

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2018

Dr. Sreeja Kochuvila and Nandi Vardhan H. R., “Modelling and Control of Three-link Planar Robot for Stable Walking Gait”, in 2018 International Conference on Electrical, Electronics, Communication, Computer, and Optimization Techniques (ICEECCOT), Msyuru, India, 2018.[Abstract]


Control of a passive walking robot has been a challenging problem in energy efficient two-legged robot. This paper proposes the modelling and control for a passive walking planar robot to achieve stable walking with an additional link representing the upper body. The dynamic model for a three-link planar robot under consideration is derived for both walking phase and during impact. The dynamics is used along with suitable initial conditions to generate the reference trajectory for stable walking. The results show that the robot follows the generated reference trajectory with the use of a controller developed using feedback linearization control law. The proposed controller is studied and validated using simulations and it is observed that the walking trajectory converges to a stable limit cycle. Thus the model can be extended to realize energy efficient walking of a biped robot with upper body mass.

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2014

Dr. Sreeja Kochuvila, Tripathi, S., and Sudarshan, T. S. B., “Control of a biped robot with flexible foot on an uneven terrain”, in 7th International Conference on Information and Automation for Sustainability, Colombo, Sri Lanka, 2014.[Abstract]


A technique to achieve stable walking of a biped robot on an uneven terrain is proposed in this paper. A biped structure with a flexible foot will be able to navigate uneven terrain more effectively than the same with a flat foot. The criterion used for stable walking is Zero moment point (ZMP). The geometric center of the support polygon formed by the flexible foot is taken for dynamically planning the reference trajectory at every step. A control law is derived using computed torque control and its validity is checked using simulation study. It is observed that the actual trajectory closely follows reference with the proposed control law.

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2014

C. Nimisha, Dr. Sreeja Kochuvila, Sudarshan, T. S. B., and Nagaraja S. R., “Flexible foot system for a biped robot”, in International Conference on Circuits, Communication, Control and Computing, 2014.

2012

Dr. Sreeja Kochuvila, Dr. Shikha Tripathi, and Sudarshan, T. S. B., “Control of a Compass Gait Biped Robot Based on Partial Feedback Linearization”, in Advances in Autonomous Robotics, 2012, pp. 117–127.[Abstract]


This paper deals with the control of a passivity based walking biped robot on a level surface using partial feedback linearization technique. A stable reference trajectory is generated from the Lagrangian dynamics of the biped robot and it is shown that the under actuated robot can follow the stable limit cycle trajectory using a control law based on partial feedback linearization approach. A comparison of the above approach with the conventional feedback linearization technique in terms of the Mean Square Error (MSE) is also carried out. Simulation of the forward walking is done on a compass like model of the biped robot.

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Publication Type: Journal Article

Year of Publication Title

2018

S. Balakrishnan, Shikha Tripathi, Sudarshan, T. S. B., and Dr. Sreeja Kochuvila, “Non Linear Dynamic Model with Varying Hip Height for Stable Walking of Biped Robot”, International Journal of Robotics & Automation, vol. 33, no. 6, 2018.[Abstract]


This work addresses the planning and control of stable walking of a biped robot on an uneven terrain. The existing models used for gait planning of a biped robot, constrain the hip trajectory to be at a constant value or a pre-defined pattern. In this work, the robot is modelled as a non-linear 3D inverted pendulum, where the hip trajectory varies according to the terrain. The foot of the robot has three degrees of freedom in the sagittal plane to obtain proper ground contact points on an uneven terrain. The zero moment point (ZMP) is fixed at the centre of the support polygon formed by the contact points. The relationship between ZMP and centre of mass of the robot is derived, and a suitable reference centre of mass trajectory is dynamically planned at each step. A control law is derived to control the centre of mass position and is validated for a robot walking on a continuous uneven terrain through both simulation and experiments.

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2013

Dr. Sreeja Kochuvila, Dr. Shikha Tripathi, and Sudarshan, T. S. B., “Stability of an Underactuated Passive Biped Robot Using Partial Feedback Linearization Technique”, Applied Mechanics and Materials, vol. 394, pp. 456–462, 2013.[Abstract]


This paper discusses the problem of achieving stable walking of a compass gait biped robot on a slope. A reference trajectory for stable walking is generated using Lagrangian dynamics of the biped robot. It is shown that an underactuated robot can follow the reference trajectory using a control law based on feedback linearization with respect to both hip and ankle joints. The results are compared in terms of Mean Square Error (MSE). The validity of the proposed controller is carried out using simulation studies.

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2012

Dr. Sreeja Kochuvila, Dr. Shikha Tripathi, and T.S.B, S., “Compass Gait Biped Robot Based on Partial Feedback Linearization”, Advances in Autonomous Robotics, Lecture Notes in Computer Science (LNCS),Springer Link, vol. 7429/2012, no. 117-127, 2012.

Publication Type: Conference Proceedings

Year of Publication Title

2017

M. Sharanya A., Harika, M. U., Sriya, M. N., and Dr. Sreeja Kochuvila, “Automatic Waste Segregator”, 6th International Conference on Advances in Computing, Communications and Informatics (ICACCI’17) . Manipal University, Karnataka, India , 2017.

2015

C. V. Krishnapriya, Dr. Sreeja Kochuvila, and Lekshmi S, “Bidirectional buck-boost cascade inverter”, Proceedings of IEEE International Conference on Technological Advancements in Power and Energy, TAP Energy 2015. Institute of Electrical and Electronics Engineers Inc., pp. 114-120, 2015.[Abstract]


This paper presents modelling and closed loop control of bidirectional buck boost cascade inverter, which produces an ac output voltage larger than the dc input voltage. The bidirectional inverter is seen as the cascade of a buck stage and a boost stage. The function of buck stage is to maintain main inductor current as a constant value and boost stage is a Current Source Inverter (CSI), which regulates the output voltage. A decoupled analog control scheme is used for inductor current control and output voltage control. © 2015 IEEE.

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Courses Taught

  • Control Systems Engineering
  • Intelligent Control Systems
  • Robotic Control
  • Adaptive Control Systems
  • Process Control
  • Biomedical Instrumentation
  • Electronic Circuits
  • Linear Integrated Circuits
  • Electric Circuits
  • Digital Signal Processing

Student Guidance

Undergraduate Students

Sl. No. Name of the Student(s) Topic Status – Ongoing/Completed Year of Completion
1. Pranav R., Sreyas S., S.Vignesh Airtouch – An EMG Controlled Mouse Ongoing  
2. B.Bhaavya Sri, K. L. Praharshita, M. Sameera Adaptive Voltage Controller for Photovoltaic Boost Converters Ongoing  
3. V. Lakshmi Thanmayi, Sunku Dharahas Reddy Detection of Leukemia Using K-Means Clustering Segmentation Algorithm Completed  
4. Deepak S., Aswathy Amarnath Energy Prediction of Lithium Ion Batteries in Electric Vehicles Completed  
5. Chitra Prasad, V. Kumaran Balakandan, Pranav Moorthy V. Controlling of Prosthetic foot using Artificial Intelligence for Instantaneous pattern recognition Completed  
6. Veera Sekhar, Sachin Kumar Shukla, Utkarsh Singh Application of Swarm Bots to Solve a Maze Completed  
7. G. Shrinidhi, Durgesh Subramanian M., Gayathri Rajesh, Enhancement of Electrical Distribution Network – Load Levelling and Regulation Completed  
8. Mamillapalli Himaja, M. Swathi, N. Yagnasri Chowdary Pneumatic-Driven Boimimetic Knee Joint for Biped Robot.    

Research Scholars

Sl. No. Name of the Student(s) Topic Status – Ongoing/Completed Year of Completion
1. Mr. Nandi Vardhan H. R. Video Analytics: Open World Person Re-identification Ongoing  
2. Ms. Ritu R. Control and Stabilization of Lower Limb Exoskeleton Ongoing  
3. Ms. Harika P. Path Planning and Navigation of Multiple Robots in Unstructured Environment Ongoing  
4. Mr. Nippun Kumaar A. A. Path Planning of mobile Robots - Learning From Demonstration Ongoing  
5. Mr. Rajesh P. Control of Nonlinear Systems Ongoing