S. Vishnu Rajendran is serving as Assistant Professor at AMMACHI Labs. He has completed his Masters in Computer Integrated Manufacturing from T. K. M. College of Engineering. His expertise is in design, programming, and control of serial and parallel manipulators, hydraulic and pneumatic system designing, process control with PLC, SCADA, and HMI, mechanical systems design, and analysis, mathematical modeling of mechanical systems. He is doing the research in the domain of wearable exoskeletons for rehabilitation.


Publication Type: Conference Paper

Year of Publication Title


J. S. Nanda, S. Vishnu Rajendran, and Bhavani, R. R., “Improvement of Posture and Muscle Force on using a Low Cost Wearable Assistive Device: A Preliminary Study”, in International Conference for Convergence in Technology, (In Press), 2019.


K. Rahul, S. Vishnu Rajendran, and Rao R. Bhavani, “Low cost mechanical assistive aid for workers carrying head loads”, in 2017 IEEE Technological Innovations in ICT for Agriculture and Rural Development (TIAR), 2017.[Abstract]

The principal activity in the unorganized sectors like brick kilns, construction sites etc. is load carrying. The workers typically carry heavy loads on their head for over 12 hours every day. This affects their health and renders them as a victim of health issues like musculoskeletal disorders. In order to offset the causes leading to these health issues, a low cost mechanical assistive aid for workers to carry loads on their head is proposed in this paper. Using this assistive aid, the load acting on the head is distributed to the shoulder and the hip, and the results show that 60 to 65 percent of the load is distributed to the hip which reduces the pressure applied on the spine

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R. Krishnan, S. Vishnu Rajendran, Mohan, T. H., and Rao R. Bhavani, “Design and Fabrication of a Low-cost Rice Transplanting Machine”, in 2017 IEEE Technological Innovations in ICT for Agriculture and Rural Development (TIAR), 2017.[Abstract]

One of the labor intensive processes in rice cultivation is transplantation, where laborers have to work in a slouching position in puddled fields. This leads to physical ailments like musculoskeletal disorders (MSD). This paper discusses the design and testing of an efficient, cost effective and easily reproducible semi-automatic rice transplanting machine to eliminate the drudgery involved in the task, improve efficiency and productivity of farmer while keeping the human-in-the-loop. The focus of the design was to build a prototype using locally available materials. The cost savings of the new prototype was over 80 percent of the commercially available machines. Studies conducted using this prototype have shown that the semi automation process reduces labor effort by 17 percent and additionally reduced the time for transplantation.

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T. Narayanan, S. Vishnu Rajendran, Rao R. Bhavani, and Vashista, V., “A cable driven parallel robot for coconut farm”, in 2017 International Conference on Advances in Computing, Communications and Informatics (ICACCI), 2017.[Abstract]

This paper presents a cable driven parallel robot for automating the process of coconut dehusking in large and medium sized farms. The robot assists the mechanized dehusking process by performing the activity of fetching coconuts from a heap and autonomously loading them into a dehusking machine's hopper. The idea is to have the existing dehusking machines to be setup right next to a coconut heap in a farmland and get the dehusking operation done with minimum human assistance. The use of a cable robot system in such highly unstructured environment requires it to be portable and reconfigurable. An efficient anchor point estimation technique and installation procedure is presented in the paper along with the system concept. The paper also discusses the kinematic design and workspace analysis of the proposed cable robot.

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S. J. Soumya, S. Vishnu Rajendran, Arjun, R. N., and Rao R. Bhavani, “Design and testing of a semi automatic rubber tree tapping machine (SART)”, in IEEE Region 10 Humanitarian Technology Conference 2016, R10-HTC 2016 - Proceedings, 2016.[Abstract]

Rubber tree tapping is considered to be a skill oriented job and the availability of such labors are getting worse day by day. This is considered to be the one of the reason which affected the natural rubber productivity from Indian plantations. Even though cheap unskilled labors are available, they cannot be used for tapping by using the traditional V groove knife or Jabong knife. So this paper discusses about a low semi automatic rubber tree tapping machine (SART) which can be used by an unskilled labor to perform tapping on the rubber tree by preserving the tree health. The proposed machine is fabricated and tested on the tree. Also a comparative study is made on the effort required to operate the machine with the traditional tapping knives used for the purpose. © 2016 IEEE.

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