Servoactuators, otherwise known as electro-mechanical actuators (EMAs), are being used increasingly in vehicles. They can control both force and position and replace many of the pneumatic and hydraulic systems on board automobiles and trucks. They offer many advantages such as better controllability and efficiency. Embedded Control has become a standard technical expression in engineering. The term Motion Control is now universally adopted to describe the control of mechanical motion with the help of electric motors and electronics. It is therefore only logical to talk of Embedded Motion, whenever the electric motor and its control electronics become an integral part of the target system. EMAs are one example of the Embedded Motion applications in vehicles. Others include pumps, fans and last not least the traction motor used in electrical or hybrid powered vehicles. The EMA is being used and considered for use in the following vehicle applications: brake systems - 'brake-by-wire'; steering systems 'steer-by-wire'; suspension systems; engine valve control; stator/generator and seat and door actuation. The future for the EMA applications presented there will in many cases be an intermediate solution in electric-hydraulic form, combining the advantages of the better controllability of the electric motor with the proven reliability of hydraulic systems in the vehicle environment. For the near future the authors may therefore expect vehicles to become 'more electric'. The 'all-ectric' vehicle (excluding traction) can only be expected in a longer time frame when hydraulics and pneumatics may totally disappear. When this happens they may hope to reap the fun benefits of cost, controllability and modularity, which this technology promises.
Servoactuators for vehicle systems
Servoaktoren für Kraftfahrzeuge
2002
5 Seiten, 8 Bilder
Conference paper
Storage medium
English
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