This book presents the proceedings of 5th International and 20th National Conference on Machines and Mechanisms (iNaCoMM 2021) held at PDPM IIITDM Jabalpur during 9-11 December 2021. The conference was held in collaboration with the Association of Machines and Mechanisms (AMM) India and International Federation for the Promotion of Mechanism and Machine sciences (IFToMM). Various topics covered in this book include kinematics and dynamics of machines, compliant mechanisms; gear, cams and power transmission systems; mechanisms and machines for rural, agricultural and industrial applications; mechanisms for space applications; mechanisms for energy harvesting; robotics and automation; human-centric robotics; soft robotics; man-machine system, mechatronics and micro-mechanisms; CAD and CAGD; control of machines; vibration of machines & rotor dynamics; acoustic and noise; tribology; condition monitoring and failure analysis; fault diagnosis and health monitoring; biomedical engineering; and composites and advanced materials. Given the contents, the book will be useful for researchers and professionals working in the various domains of mechanical engineering.

Prof. Vijay Kumar Gupta is currently working as Professor in Mechanical Engineering Discipline at PDPM Indian Institute of Information Technology, Design and Manufacturing, Jabalpur. He is having more than 27 years of teaching and research experience. He received his Ph.D. in Mechanical Engineering from the Indian Institute of Technology Bombay, India. His research interests includes smart structure, vibration, design, reliability, finite element analysis, mechatronics and robotics, etc. He has published more than 35 papers in refereed journals and conferences and 14 books/ book chapters. He is the recipient of the ISAME K. Suryanarayan Rao Memorial Senior Student Award for R&D in Smart Technology for the year 2003 and JSPS invitation fellowship for the year 2015. He is a member of ASME, IEEE, SRESA, IE, ISTE and other professional bodies.

Prof. C. Amarnath is a Mechanical Engineering Graduate of 1968. He earned his Ph.D. in the area of Mechanism Synthesis and Design in 1976 and joined IIT Bombay as a faculty member soon after. He has held several senior positions like Head of Dept and Dean at IIT Bombay. He also headed SINE, the Technology Business Incubator of IIT Bombay. Prof. Amarnath was instrumental in founding and is the current President of the Association for Machines and Mechanisms, the national body affiliated with the International Federation of Mechanism and Machine Theory. He has been associated with various Government of India organizations like DST, DSIR, TIFAC and Chairs some of their committees. Prof. Amarnath is currently working as Emeritus Professor at IIT Bombay, Cummins Chair Professor of Mechanical Engineering at Cummins College of Engineering, Pune and Visiting Professor at IIT Dharwad.

Prof. Puneet Tandon is a joint Professor of Mechanical Engineering and Design Disciplines at PDPM Indian Institute of Information Technology, Design and Manufacturing, Jabalpur, India. His primary research interests include CAx technologies, including CAD/CAM/CAE, BioCAD, and Human Factors in CAD; Innovative Product Design; and Advanced Manufacturing Technologies, including Hybrid, Dieless, Additive, and Smart Manufacturing. He graduated in Mechanical Engineering from the National Institute of Technology Kurukshetra, India. He received his Master and Doctoral degrees in Mechanical Engineering from the Indian Institute of Technology Kanpur, India. He has more than 33 years of experience in engineering research and education. He has more than 300 publications in peer-reviewed journals/book chapters/ international/national conferences, besides being the author of 2 books and 20 patents. He has been editor/guest editor of a few Journals. He has been awarded the 2020 DUO-India Fellowship Award with Padova University, Italy. He has also been awarded prizes in various IMTEX, organized by Indian Machine Tool Manufacturers' Association. Some of his research papers have been among the most downloaded and cited articles and awarded "Certificate of Merit". He was also the organizer of the International Conference on Innovations in Design and Manufacturing (InnDeM) 2012 and Design Workshop (DeW) 2010. He is a fellow of the International Association of Computer Science and Information Technology (IACSIT) and a member of ASME, SME, ACM SIGGRAPH, IAENG, IE and ISTE.

Dr. M. Zahid Ansari is an Associate Professor in Mechanical Engineering Discipline at PDPM IIITDM Jabalpur. He received his BTech degree from the Aligarh Muslim University, India, in 2001, and MTech and PhD degrees in 2006 and 2010, respectively, from the Department of Mechanical Engineering, Inha University, South Korea. He is having more than 15 years of teaching and research experience and published more than 100 journal and conference papers and three patents. His research interests include vibration, design, MEMS and smart materials & structures.