New Publications are available for Engineering mechanics
http://dl-live.theiet.org
New Publications are available now online for this publication.
Please follow the links to view the publication.Wood Pole Overhead Lines
http://dl-live.theiet.org/content/books/po/pbpo048e
<p xmlns="http://pub2web.metastore.ingenta.com/ns/">This book concentrates on the mechanical aspects of distribution wood pole lines, including live line working, environmental influences, climate change and international standards. Other topics include statutory requirements, safety, profiling, traditional and probabilistic design, weather loads, bare and covered conductors, different types of overhead systems, conductor choice, construction and maintenance.</p>The eccentric engineer
http://dl-live.theiet.org/content/journals/10.1049/et.2009.1217
The article features the multiple inventions of Al-Shaykh Ra'is al-A'mal Badi' al-Zaman Abu al-Izz ibn Isma'il ibn al-Razzaz al-Jazari (1136-1206), thankfully known as just al-Jazari. He was the senior engineer to Nasir Al-Din, the Artuqid king of Diyar Bakr of northern Irag. What makes al-Jazari really stand out is that he wrote a book, the intriguing 'Book of Knowledge of Ingenious Mechanical Devices' (1206). Al-Jazari's book, containing a biweldering array of machines - 50 devices in all with everything from pumps and fountains to blood-letting tools. A great builder of automata, he was one of the first engineers to turn his mind to what we today call the 'domestic appliances'.Structure design of two types of sliding-mode controllers for a class of under-actuated mechanical systems
http://dl-live.theiet.org/content/journals/10.1049/iet-cta_20050435
On the basis of sliding-mode control, two sliding-mode controller models based on incremental hierarchical structure and aggregated hierarchical structure for a class of under-actuated systems are presented. The design steps of the two types of sliding-mode controllers and the principle of choosing parameters are given. At the same time, to guarantee the system's stability, two determinant theorems are presented. Then, by theoretical analysis, the two types of sliding-mode controllers are proved to be globally stable in the sense that all signals involved are bounded. The simulation results show the validity of the methods. Therefore an academic foundation for the development of high-dimension under-actuated mechanical systems is provided.