Mechanics of Machines 6 min read
Cam Design
The translational or rotational displacement of the follower is a function of the rotary angle of the cam. A designer…
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Classification of Cam Mechanisms
We can classify cam mechanisms by the modes of input/output motion, the configuration and arrangement of the follower, and the…
Mechanics of Machines 1 min read
Layout of plate cam profiles
· Drawing the displacement diagrams for the different kinds of the motions and the plate cam profiles for these different motions…
Mechanics of Machines 6 min read
KINEMATICS OF CAM MECHANISMS CAMS
INTRODUCTION A cam is a mechanical device used to transmit motion to a follower by direct contact. The driver is…
Uncategorized 2 min read
Types of Kinematic Pairs
Kinematic pairs can be classified according to i) Nature of contact. ii) Nature of mechanical constraint. iii) Nature of relative motion. i) Kinematic…
Mechanics of Machines 3 min read
BASICS OF MECHANISMS
Introduction: Definitions : Link or Element, Pairing of Elements with degrees of freedom, Grubler’s criterion (without derivation), Kinematic chain, Mechanism,…
Mechanics of Machines 3 min read
Kinematic Inversions of 4-bar chain and slider crank chains
· Types of Kinematic Chain: 1) Four bar chain 2) Single slider chain 3) Double Slider chain · Four bar Chain: The chain…
Intelligent Transportation System 13 min read
Introduction to How to Provide Accurate and Robust Traffic Forecasts Practically?
With the development of our modern cities, growing traffic problems adversely affect people’s traveling convenience more and more, which has become one of the most crucial factors considered in urban planning and design in recent years. Urban traffic congestion is a severe problem that significantly reduces the quality of life in particularly metropolitan areas. However, frequently constructing new roads is not realistic and untenable in social and economic aspects. In the effort to deal with this intractable problem, so-called intelligent transportation systems (ITS) technologies are successfully implemented widely throughout the world nowadays. ITS with two important components advanced traffic management systems (ATMS) and advanced traveler information systems (ATIS) aim to relieve the…
Intelligent Transportation System 31 min read
Introduction to Active Traffic Management as a Tool for Addressing Traffic Congestion
Recurrent and non-ecurrent congestion in urban areas continues to be a major concern due to its adverse impacts on delays, fuel consumption and pollution, driver frustration,…
Intelligent Transportation System 31 min read
Introduction to Deploying Wireless Sensor Devices in Intelligent Transportation System Applications
A recent study by the UK Government’s Office of Science and Innovation, which examined how future intelligent infrastructure would evolve to support transportation over the next 50 years looked at a range of new technologies, systems and services that may emerge over that period (UK DfT, 2006). One key class of technology that was identified as having a significant role in delivering future intelligence to the transport sector was wireless sensor networks and in particular the fusion of fixed and mobile networks to help deliver a safe, sustainable and robust future transportation system based on the better collection of data, its processing and dissemination and the intelligent use of the data in a fully …
Intelligent Transportation System 16 min read
Introduction to Investigation of Measurement for Travel Time Variability
Congestion has grown over the past two decades making the travel time highly unreliable. The Federal Highway Administration (FHWA), US Department of Transportation (USDOT) indicated travel time as an important index to measure congestion. Frequent but stochastic, irregular delays increase the challenge for people to plan their journey – e.g. when to depart from the origin, which mode(s) and route(s) to use so the on-time arrival at the destination can be ensured. In addition to average travel time, the reliability of travel time has been deemed as an index for quantifying the effects of congestion, which can be applied to the areas of transportation system planning, management and operations as well as network modeling. Travel time reliability has been classified into two categories: probability of a non-failure…
Intelligent Transportation System 25 min read
Introduction to Microwave Beamforming Networks for Intelligent Transportation Systems
An Intelligent Transportation System (ITS) is a system based on wireless communications which has been investigated for many years in order to provide new technologies able to improve safety and efficiency of road transportation with integrated vehicle and road systems. It combines all aspects of technology and systems design concepts in order to develop and improve transportation system of all kinds. ITS, which utilise information and communications technology in vehicle as well as within the roadside infrastructure, can also be used to improve mobility while increasing transport safety, reducing traffic congestion, maximising comfort, and reducing environmental impact (Andrisano et al., 2000). Intelligent transportation systems and applications can improve the quality of travel by selecting routes with up-to-the-minute information data, giving priority to response vehicle teams, notifying drivers…