Feature sponsored by Test & measurement
Global engineering technologies company Renishaw and encoders specialist RLS provided magnetic encoders provided technical support to British-based Dynisma for its latest dynamic motion simulator designed for applications in motorsport and beyond.
I
n aviation, flight simulators are a vital tool for both pilots and engineers. They allow testing and pilot training to take place in safety on the ground. For customers in elite motorsport and the automotive sector, Dynisma has pioneered a new class of motion
generator, DMG-1, that accurately simulates motion cues in minute detail to provide a totally immersive driving experience. DMG-1 is also designed for vehicle dynamics testing and NVH (noise, vibration, and harshness) applications in automotive development. Dynisma was founded by Ash Warne who previously ran the simulator teams at the F1 racing divisions of McLaren and then Ferrari. Dynisma's aim is to develop high performance driving simulators that deliver realistic vehicle motion cues to both championship winning F1 drivers and automotive engineers evaluating the ride of an upcoming passenger car before it has been built. “Our DMG-1 motion generator is used in automotive testing and motorsport,” explains Ash Warne, chief engineer and CEO of Dynisma. “It is a technology that enables, for the first time, motorsport teams and automotive customers to carry out more realistic and higher fidelity tests than ever before. For example, the unique characteristics of this technology are its high bandwidth and very low latency; this means that our customers can put more information through their motion generator providing a more realistic and immersive scenario than they have ever been able to before.” The motion system of DMG-1 is split into two parts: a high frequency platform (HFP) which delivers high fidelity and high bandwidth motion, and a low-frequency platform (LFP) which enables larger movements. A visual system is synchronised with the motion system to
provide visual cues to the driver.
“Integrated with the motion generator is the visual system,” says Joshua Bell, Dynisma’s DMG-1 engineering lead. “When the driver is sitting in the chassis, they are fully emersed in the world that they see. When they are driving around, they are feeling both the motion cues from the simulator and seeing the visual cues from the visual system too. The two systems work in lockstep with each other.”
CHALLENGE
Many motion simulators for high-end professional use in the commercial aviation and military sectors are large, heavy, complex, and expensive. A significant effort is now underway to make systems that are smaller and lighter, without sacrificing performance. Low latency is also critically important, especially in motorsport, where a driver is trying to drive a racing car on the limit of grip. Latency is the delay between sending motion commands to the motion simulator and the actuation of the commanded motion. When the driver corrects for oversteer, they can only do so as quickly as the motion system provides feedback. The driver can drive the simulated car in a more accurate fashion because of low latency. For example, in some simulators, where the latency is higher, extra understeer might have to be programmed into the vehicle model just to make the vehicle controllable. Low latency enables a fully correlated vehicle model to be used which gives the driver an accurate simulation of the real-world driving experience. In automotive design, the simulation of an accurate full vehicle model is essential in representing the behaviour of the vehicle related to its dynamic system performance such as ride comfort and handling.
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June 2023 Instrumentation Monthly
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