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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Abstract
This seminar investigates and compares the efficiencies of four different interfaces for vibration-based energy harvesting systems. Among those four circuits, two circuits adopt the synchronous switching technique, in which the circuit is switched synchronously with the vibration. In this study, a simple source-less trigger circuit used to control the synchronized switch is proposed and two interface circuits of energy harvesting systems are designed based on the trigger circuit. To validate the effectiveness of the proposed circuit ....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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Economic development cannot go without the exploration of minerals and economic development needs the support of energy, so here comes a question: what kind of mining machinery has the highest cost performance for mineral exploitation? Zenith Machinery is engaged in the research and manufacture of jaw crushers and other types of mining crushers, and after concluding the manufacturing concept of jaw crusher,German manufacturing company supply feldspar crusher our company has successfully researched and developed hammer mill crusher, impact crush ....etc

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Abstract
Swarm-bots consist of a collection of mobile robots able to self-assemble and to self-organize so to
solve problems that could not be solved by a single robot. They combines the power of swarm
intelligence and the flexibility of self-reconfiguration as aggregate swarm-bots have the ability to
dynamically change their structure to match environmental variability.
SWARM-BOTS, a project funded by the Future and Emerging Technologies program of the
European Community (project IST-2000-31010), focuses on the design and the imp ....etc

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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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