New simulator motion-cueing architecture

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Cruden will present a new approach to motion-cueing, combining vehicle side-slip angle and dynamic varying yaw pole, when it exhibits at the Automotive Testing Expo Europe 2014, next month (June 24th-26th; Messe Stuttgart, Germany; stand 1169).

Following the introduction last year of enhancements to the company’s ePhyse external physics package, which allowed new levels of motion-cueing customization on its simulators, Cruden will present its own interpretation of the new interface. Adding vehicle side-slip angle and dynamic varying yaw pole to existing motion cues overcomes the limits of traditional acceleration cues and is particularly useful in providing realistic feel of oversteer and understeer.

“There are limits to how well a motion based simulator can cue acceleration on the longitudinal and lateral direction because the available space is used quickly and the feeling cannot be sustained. We understand that some vehicle dynamics teams, particularly in motorsport and performance car applications, need more,” explains Edwin de Vries, senior vehicle dynamics engineer at Cruden.

“Our novel cueing method imposes the vehicle’s side slip angle – a signal that fits, unmodified, within the motion space – on the platform’s yaw angle to avoid washout- and high pass cueing filters, enriching the driver’s handling perception.

“We can show a reduction of the latency of platform motion with respect to simulated vehicle; the yaw response is more crisp than with the traditional cueing,” says de Vries.

With the new ePhyse add-on, users are able to bypass the standard cueing algorithms and command direct platform set points from within the Simulink environment; the motion base software continues to manage the system’s inverse kinematics, workspace and safety aspects. This opens up opportunities for advanced cueing techniques like model predictive control or prepositioning.

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About Author

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Graham Heeps is a regular contributor, and knows the dynamics industry well, having previously edited the title. Graham also writes regularly on automotive and motorsport subjects for other magazines from Vehicle Dynamics International’s publisher, UKi Media & Events (as well as editing Tire Technology International), and contributes to a range of online and print publications in the UK, USA and Canada.

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