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| Future trends in vehicle dynamics | |
June 2008 |
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| TRW Frank Lubischer, vice-president steering and suspension engineering "We always consider the vehicle's entire ride and handling potential, with all its inter-related performance and safety characteristics. We analyse the OEM’s requirements, identify the critical aspects and then assess the vehicle’s potential for ways of improving it beyond the specification. "Simulation tools are part of our standard process, especially in baseline setups. They give us instant parameters – specific dynamic manoeuvres such as double lane changes define the critical performance parameters and so determine motor sizes for electronic steering and stability systems. "We gather data on the full range of use – centres of gravity, loads and tyres – to define boundary conditions. Developing systems for many OEMs, vehicles and markets means we keep adding data sets to our application libraries. Customers can then start from a recommended baseline, tailoring performance to the vehicle’s specific need and potential. "Safety will remain a key driver in the next few years. We’ll see more suspensions that take full advantage of control systems for convenience, comfort and safety. An increasingly "active" chassis can make many safety related features available to the buyer, based on existing technology. Adding just radar, laser or ultrasonic sensors and electronic "rumble strips" in the steering can alert the driver to hazards. "The next generation of winning automotive technologies will be safety-enhancing functions linked to object detection and lane guidance technologies – emergency braking, lane guidance assistance and GPS information. "Pure electric steering and electric powered hydraulic systems will become mainstream. The need to reduce hydraulic systems’ parasitic losses will drive growth, along with safety and convenience features. "Torque vectoring is interesting as it can influence a vehicle's cornering capabilities for agility and stability. As a steering and braking system developer, we can influence the driving- and braking-torque distribution to the individual wheels in combination with the steering- angle and -torque. We can also provide data to other systems such as active transfer-cases and differentials."
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Frank Lubischer,
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