Mechanica 2011 - IIT Madras

April 9,10 (Mechanical)

Mechanica 2011, an annual technical festival of the Mechanical Engineering Department of IIT Madras, Chennai. At Mechanica, we present to you unparallel oppoirtunities to test your skills.

National Symposium on Rotor Dynamics - IIT Madras

December 19,20,21

Most machines have one or more rotating parts. Rotating machine elements thus form the backbone of industrial infrastructure and therefore play a pivotal role in the growth and development of the country. Rotor Dynamics is the key in design and maintenance of all such rotating machinery. This area has made tremendous strides in recent years.

ObCom 2011 - VIT

September 9

This International Conference is a major event to be conducted following the grand success of series of ObCom conferences during 2003, 2004 and 2006, which were audited by a good number of participants from Academia and Industry across the World. The past ObCom conferences received good contributions from academia, industry and research organizations. Our sponsors included governmental and non-governmental agencies like DRDO, ISTE, DIT, CSIR etc.

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Technical Papers and Symposium Details

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AUTOTRONICS

Posted by tpapers On 7:16 pm
Abstract:

The throttle cable has almost become redundant on today's motor vehicle. The drive-by-wire system has now found its way onto other vehicles with humbler routes and can be found on base models. Historically a mechanical linkage between the accelerator pedal and the throttle butterfly has always existed, be it via a cable or via rods and linkages. These have now been replaced by sophisticated electronic control modules, sensors and actuators. This system is also referred to 'Fly-by-Wire'.
In order to implement electronically variable dynamics for vehicle handling, the control System requires an accurate knowledge of the vehicle states as well as a means of actuation to precisely influence the vehicle's motion. Steer-by-wire capability conveniently addresses both of these requirements. This paper presents an approach to estimating vehicle sideslip angle using steering torque information. This method is especially suited to vehicles equipped with steer-by-wire since the steering torque can easily be determined from the current applied to the steering motor.
It seems that everything is wired these days. As technology advances, more and more mechanical systems are being replaced by electronics. With respect to undercar systems, conventional shocks and struts have been replaced with electronic dampers. Coil springs have been replaced with computer-controlled air spring suspensions. Yet most of these changes to date have been limited to high-end luxury or performance vehicles. Cost is one reason. The other is reliability. Electronics can provide significant improvements in many areas of vehicle control, but only if the new systems are trouble-free and dependable, which has not always been the case.
Today, virtually all cars come with Anti-lock braking system (ABS) as standard equipment or as an option. The typical ABS system includes wheel-speed sensors, a hydraulic control unit, and an electronic control unit. When you apply the brake pedal, the electronic control unit monitors and compares the signals from the wheel-speed sensors. If the electronic control unit senses rapid deceleration (impending lock-up) at a given wheel, the electronic control unit commands the hydraulic control unit to reduce hydraulic pressure to that wheel. 

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