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RC-S Real Car Simulation Bench

This system allows for the evaluation of various performance aspects of next-generation vehicles without including tire-related factors.
This system can reproduce transient behaviors that cannot be achieved with a chassis dynamometer, enabling vehicle control evaluation including regenerative braking for electric vehicles, as well as vehicle noise measurement excluding road noise. It is also a system capable of evaluating autonomous driving functions.

RC-S achieves transient testing in actual vehicles by combining real-time model calculations with low-inertia motors. By replacing the wheels of the actual vehicle with tire-type bearings and bringing the axle shaft outside the vehicle and connecting it to a low-inertia motor, it enables various evaluations that exclude the tire element.
Furthermore, by connecting to ADAS/AD verification simulation tools, autonomous driving functions such as lane keeping assist can also be evaluated on the test bench.

System Configurations

  • System Configurations

Option

system configuration diagram

By installing this system on the rotation detection gear of the torque meter used in our HIL bench system and inputting the obtained highly responsive measurement signal as a control FB signal into the control DSP, dynamo controllability can be improved.

  • system configuration diagram

Effectiveness Verification

This is a verification of the command value tracking performance when this system is adopted. This system increases the measurement resolution and significantly improves the tracking performance to the rotation speed command value.

Stability at a constant rotation

  • Stability at a constant rotation

Starting from zero rotational speed

  • Starting from zero rotational speed

Driving Examples

By adopting this system, we confirmed that it is possible to reproduce the differences in tire characteristics during starting behavior at extremely low speeds, which was difficult to verify using conventional measurement methods.

Comparison of different tire models for acceleration from a standstill

  • Comparison of different tire models for acceleration from a standstill

Case Studies

It integrates with ADAS/AD development simulation tools to simulate actual vehicle driving environments on a test bench.
By integrating with various sensor simulation devices and sensor models, we enable on-board system verification and AI training for ADAS/AD vehicles.
By enabling development and evaluation on a test bench—which was previously only possible through simulations and test courses—we can achieve safe and reliable ADAS/AD vehicle development.

  • Case Studies

Operation Example 1: Operation example of a driving scenario on an expressway.

RC-S can work in conjunction with various simulators to safely evaluate diverse driving scenarios.

* This video was produced with the cooperation of Virtual Mechanics Co., Ltd. and Rikei Corporation.

Operation Example 2: General Road Driving Scenario (Collision Mitigation Braking/Lane Departure Warning) Operation Example

The RC-S allows for safe and efficient evaluation of camera sensors and millimeter-wave radar sensors, which are widely used in ADAS functions, under actual vehicle conditions.
The example shows an operational example of a collision mitigation braking system and lane departure warning system in an evaluation scenario where a collision is possible.
Another potential use is its integration with car navigation systems, making it suitable for bench testing of ECU control technologies using navigation information.

* This video was produced by dSPACE Japan Co., Ltd. in cooperation with our company.

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