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In construction industry, the conventional way of construction of buildings is a costly, time consuming and a labour-intensive job. Besides that, many on-site fatalities happen during the construction activity and the climate can delay construction activity. 3-D printer robot resolves all these problems. Also, it can be used for intricate building designs and for construction of buildings in remote locations or in epidemic situations. The objective of the project is to make an autonomous robot for 3-D printing a simple civil structure. Three lead screws will provide the movement in the vertical as well as in horizontal directions and a nozzle connected to the horizontal lead screw will be used for pouring the construction-material layer by layer. Thereafter, structural analysis using Finite Element Method (FEM) has been done on critical parts like lead screw and top plate. Bond graphs for buggy and overall lead screw system have also been used to analyze the response of the system. Furthermore, the wring diagram is also developed and presented in the paper. Future research is required for the development of actual robot for building multi-storied structures, on the design of nozzle and type of material used for pouring.

Nowadays, the key research area of many researchers is the walking mechanism of the robot as walking robots are used in many areas such as military, exploring new materials in space etc. The legged robots are much more capable to move on any type of terrain as compared to wheel robots. The focus of this work is to modelling, simulation and control a stable walking system for quadruped robot model. The proposed model of the quadruped robot is validated for side ramp walking without falling down due its weight. The PI controller is developed to control the movement of the quadruped during walking on the side ramp, which is not reported in literature. Initially, modelling of quadruped robot is done using bond graph approach and Simmechanics technique. Results from both methods are compared and discussed. The trot gait is considered for stable walking of quadruped robot. The Proportional-Integral (PI) based control scheme is proposed for locomotion of the robot along desired path. Finally, the case study for validation of proposed model is done for side ramp walking of quadruped robot.

With an increase in number of knee problems in patients., the demand for the rehabilitation has increased. Most of the rehabilitation trainings are expensive and time consuming. So., the need for personalized treatment in rehabilitation is increasing. The knee exoskeleton is one of such solutions to assist the patients suffering from weal knee., paraplegia and hemiplegia. These exoskeletons meet the patient’s expectation in terms of assistance required and wearing comfort. These are relatively more portable than lower body exoskeletons owing to their lighter weight. These can either be used for gait rehabilitation., providing assistance during sit to stand motion., normal walking and running., for load carrying augmentation or for performing activities of daily living. In this work., a knee exoskeleton consisting of a linear actuator and surface Electromyography sensor is designed and fabricated. Experiments are performed to validate the results with those of theoretical one. The developed knee exoskeleton is found to be well suited for assisting the wearer during the rehabilitation.