Chapter 1 Introduction
1.1 Introduction to Multi-legged robots1.2 Gait Planning of six-legged robots1.3 Literature Review of legged robot1.3.1 Kinematics of legged robots1.3.2 Dynamics of legged robots1.3.3 Foot-ground contact modeling1.3.4 Foot Force Distribution and power consumption1.3.5 Stability of legged robots1.4 Gaps in Literature1.5 Aims and Objectives1.6 Book Overview1.7 Book's Contributions1.8 Summary
Chapter 2 Kinematic Modeling and Analysis of Six-Legged Robots
2.1 Description of the Problem2.1.1 Description of Proposed Six-legged Walking Robot2.1.2 Gait Terminologies and their Relationships2.1.3 Steps involved in Proposed Methodology2.2 Analytical Framework2.2.1 Reference system in cartesian coordinates2.2.2 Kinematic constraint equations2.2.3 Inverse Kinematic Model of the six-legged robotic system2.2.4 Terrain model2.2.5 Locomotion planning on varying terrain2.2.5.1 Motion planning for robot's body2.2.5.2 Swing leg trajectory planning2.2.5.3 Foot Slip During Support Phase2.2.6 Gait planning strategy2.2.7 Evaluation of kinematic parameters2.2.8 Estimation of aggregate center of mass2.3 Numerical Simulation: Study of kinematic motion parameters2.3.1 Case Study 1: Robot motion in an uneven terrain with straight-forward motion (DF=1/2)2.3.2 Case Study 2: Crab Motion of the robot on a banked terrain (DF=3/4)2.4 Summary
Chapter 3 Multi-body Inverse Dynamic Modeling and Analysis of Six-Legged Robots
3.1 Analytical Framework3.1.1 Implicit Constrained Inverse Dynamic Model3.1.2 Newtonian Mechanics with Explicit Constraints 3.1.3 Three Dimensional Contact Force Model 3.1.3.1 Compliant contact-impact model 3.1.3.2 Interactive forces and moments 3.1.3.3 Amonton-Coulomb's friction model 3.1.4 Static Equilibrium Moment Equation 3.1.5 Actuator torque limits 3.1.6 Optimal feet forces' distributions 3.1.7 Energy consumption of a six-legged robot 3.1.8 Stability measures of six-legged robots 3.1.8.1. Statically-stable walking based on ESM, NESM 3.1.8.2. Dynamically stable walking based on DGSM 3.2 Numerical Illustrations 3.2.1 Study of optimal feet forces' distribution 3.2.1.1 Case Study 1: Robot motion in an uneven terrain with straight-forward motion (DF=1/2) 3.2.1.2 Case Study 2: Crab Motion of the robot on a banked surface (DF=3/4) 3.2.2 Study of performance indices- power consumption and stability measure 3.2.2.1 Effect of trunk body velocity on energy consumption and stability 3.2.2.2 Effect of stroke on energy consumption and stability 3.2.2.3 Effect of body height on energy consumption and stability 3.2.2.4 Effect of leg offset on energy consumption and stability 3.2.2.5 Effect of variable geometry of trunk body on energy consumption and stability 3.2.2.6 Effect of crab angle on energy consumption and stability 3.3 Summary
Chapter 4 Validation using Virtual Prototyping tools and Experiments
4.1 Modeling using Virtual prototyping tools 4.2 Numerical Simulation and Validation using VP Tools and Experiments 4.2.1. Validation of Kinematic motion parameters 4.2.1.1 Case Study 1: Crab motion of the robot to avoid obstacle on a flat terrain 4.2.1.2 Case Study 2: Turning Motion of the robot on a banked surface
About the Author: Dr. Abhijit Mahapatra received B.E. and M.Tech. degrees in Mechanical Engineering from B.E. College (now, BESU), Shibpur, India, and NIT Durgapur, India, in 2002 and 2008, respectively. He received his Ph.D. from NIT Durgapur, India, in 2018. He is currently working as a Senior Scientist in the Advanced Design and Analysis Group at CSIR- Central Mechanical Engineering Research Institute, Durgapur, India.
Dr. Mahapatra has published a number of research papers in national and international journals and conference proceedings and filed several patents in the area of product development. His current research interests include design & analysis, multi-body dynamics, and modelling and simulating legged robots.
Dr. Shibendu Shekhar Roy received B.E. and M.Tech. degrees in Mechanical Engineering from NIT, Durgapur. He also holds a Ph.D. from IIT, Kharagpur, India. He is currently working as a Professor at the Department of Mechanical Engineering and Associate Dean (Alumni Affairs & Outreach) at the National Institute of Technology, Durgapur.
Dr. Roy has published more than 68 papers in national and international journals and conference proceedings, as well as 4 book chapters, and has filed a number of patents in the area of product development. His current research interests include modelling and simulating legged robots, soft robotics, rehabilitation robotics, additive manufacturing and 3D printing on macro- and micro-scales.
Dr. Dilip Kumar Pratihar completed his B.E. and M. Tech. in Mechanical Engineering at NIT, Durgapur, India, in 1988 and 1995, respectively. He received his Ph.D. from IIT Kanpur in 2000. Dr. Pratihar pursued postdoctoral studies in Japan and then in Germany under the Alexander von Humboldt Fellowship Program. He is currently working as a Professor at IIT Kharagpur, India. His research areas include robotics, soft computing and manufacturing science.
He has made significant contributions in the development of intelligent autonomous systems in various fields, including robotics, and manufacturing science. He has published more than 230 papers, mostly in international journals, and is on the editorial board of 12 international journals. He is a member of the FIE, MASME and SMIEEE. He has completed a number of sponsored (funded by DST, DAE, MHRD, DBT) and consultancy projects and is a member of Expert Committee of Advanced Manufacturing Technology, DST, Government of India.
