Abstract
This paper develops a trajectory planning algorithm for a
four-wheel-steering (4WS) vehicle based on vehicle
kinematics. The flexibility offered by the steering is
utilized fully in the trajectory planning. A two-part
trajectory planning algorithm consists of the steering
planning and velocity planning. The limits of vehicle
mechanism and drive torque are taken into account.
Simulation results are presented to illustrate the
application of the proposed algorithm.
Introduction
Research works on Autonomous ....etc

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The front wheel steering system of conventional vehicle fails to keep the vehicle stable at high speeds and prove futile for heavy vehicles like tracks and trailers, especially in tight space. But if the rear wheels too could be steered, manoeuvrability of the vehicle will be enhanced. This results in the evolution Four-wheel steering (4WS). In 4WS, rear wheel are also steered in combination with the front wheels. This system helps in achieving superior cornering stability, improved steering responsiveness and precision, high -speed straight-li ....etc

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please i want seminar material with diagrams on this topic completely explaining the mechanism involved. ....etc

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Hi i am Mohammed i would like to get details on FOUR-QUADRANT CHOPPER DRIVE FOR UNIVERSAL DC MOTOR .Through google search i came to know that this site has detailed info on how to make a  FOUR-QUADRANT CHOPPER DRIVE FOR UNIVERSAL DC MOTOR will be available here. Would really appreciate the help I managed some pdf's but those were lacking the appropriate item description.I need help on this matter. ....etc

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FOUR-QUADRANT CHOPPER DRIVE FOR UNIVERSAL DC MOTOR


#G-5, Ratna Complex, Ameerpet,
#310, OPP. Kalaniketan, Dilshukh Nagar



AIM:
The main aim of the project is to develop a speed control system for DC motor using four-quadrant chopper. Using four-quadrant chopper it is possible to demonstrate forward &reverse motoring and braking.
PURPOSE:
The purpose of the project is to implement a simple and cost effective process to control the speed of DC mot ....etc

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demerit and merit of four quadrant d.c
drive
....etc

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please do send me the ppt of the project(pendrive to pendrive data transfer without using pc)
....etc

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Difference between the chopper fed and converter fed drives ....etc

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FOUR WHEEL STEERING SYSTEM
ABSTRACT
This paper deals with the details of four wheel steering (4WS) system. With the help of this system all the four wheels can be turned to any direction using the steering. Thus the vehicle can be controlled more effectively especially during cornering and parking. Also the speed of the vehicle can be increased or decreased.
There are three types of production of four-wheel ¬steering systems:
1. Mechanical 4WS
2. Hydraulic 4WS
3. Electro/hydraulic 4WS
The mechanical 4WS uses two separate s ....etc

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Four-wheel steering, 4WS, also called rear-wheel steering or all-wheel steering, provides a means to actively steer the rear wheels during turning maneuvers. It should not be confused with four-wheel drive in which all four wheels of a vehicle are powered. It improves handling and help the vehicle make tighter turns.

Production-built cars tend to understeer or, in few instances, oversteer. If a car could automatically compensate for an understeer/oversteer problem, the driver would enjoy nearly ....etc

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