Anamika Jain

PV Based Green Computing System for ICT Sustainable Development

Photovoltaics (PV) appear to be upcoming solution for triple crunch i.e. Credit, climate and energy crisis. In a step forward to reduce carbon emissions and promote clean renewable technology, ICT (Information Communication and Technology) is promoting Green Computing for planetary and personal sustainability. Although India ranks amongst top five solar investors in world, PV Research and Development support is not achieving benchmarks in ICT. A massive utilization of PV potential towards designing, fabrication/manufacturing, lay-out, installation, operationalization, maintenance of complete hard ware units as well as the product processes development, product manufacturing, product packaging, storage and marketing, etc needs to be identified. PV technology can give a platform to form basis of green IT and sustainability for manufacturing different computer gadgetry. An integrated solution on real ground towards achieving ICT development is presented by comparing energy saving and CO2 emission statistics for BTS (Base Transceiver Station), Electronic Charger and Laptop with Desktop PC. The innovative green solar PV products available in market are presented. It is observed that their implementation can deliver high efficiency, reduced fuel consumption and reduction of harmful effects. The system can work as low risk capacity green resources based asset for entrepreneurs.

High Performance Control of Stewart Platform Manipulator Using Sliding Mode Control with Synchronization Error

This paper presents the design and analysis of a high performance robust controller for the Stewart platform manipulator. The controller is a variable structure controller that uses a linear sliding surface which is designed to drive both tracking and synchronization errors to zero. In the controller the model based equivalent control part of the sliding mode controller is computed in task space and the discontinuous switching controller part is computed in joint space and hence it is a hybrid of the two approaches. The hybrid implementation helps to reduce computation time and to achieve high performance in task space without the need to measure or estimate 6DOF task space positions. Effect of actuator friction, backlash and parameter variation due to loading have been studied and simulation results confirmed that the controller is robust and achieves better tracking accuracy than other types of sliding mode controllers and simple PID controller.