Subjective Driving Evaluation:
The use of automated driving systems from Level 1 to Level 3 is inseparable from the driver's intervention. Regardless of whether the driver is responsible for the driving control itself, the driver's subjective feelings directly affect the driving safety. Therefore, the evaluation of the driver's subjective feelings is an important indicator of such systematic evaluation. In addition, the driver's subjective feeling is crucial even for automated driving systems above Level 4. This is the most direct indicator of drive comfort. In summary, the driver's subjective evaluation is an important standard that reflects the quality of the automated driving system and even the safety indicators. Driving Simulator: The driving simulator is considered in nowadays world as one of the main ways to test and improve the driver's subjective feelings in automated driving development.The advantages of the driving simulator are:
1）The driving simulator can provide the driver with a complete driving or riding experience at the beginning of the development of an automated driving system. There is no need to build complex hardware prototypes or prototype vehicles in this process.
2）All algorithms and hardware (such as spring damping system) can be replaced and adjusted simply by parameterization without the need to change the hardware or the large amount of loading and unloading costs caused by the hardware adjustment.
However, using the driving simulator to evaluate the driver's subjective feelings challenges the reality of the representation in driving simulator. PilotD applies the latest virtual reality (AR\VR\MR) technology in the field of visual representation in the construction of the driving simulator. Combined with the driving environment simulation platform GaiA, the most realistic driving experience is represented, which makes the evaluation of driver’s subjective feeling more accurate and convincing.
The process from VR to AR to MR embodies three phases of virtual reality technology. VR VR (Virtual Reality) technology is a technology that integrates human exploration and interaction into a computer-generated three-dimensional world. VR is the beginning and foundation of AR and MR. Through VR, human beings can freely observe the world and make some behaviors in a purely virtual world to change the perspective of observation. The capabilities of VR devices limit the dimensions of behavior that humans can make in this three-dimensional environment. Generally divided into three dimensions and six dimensions. PilotD's VR reproduction can achieve six-dimensional exploration. The device supports the driver's translation and rotation on the X, Y, Z axes, providing the most realistic cockpit experience. AR AR (Augmented Reality) technology is a derivative of VR technology. If you say that VR technology is pure virtual visual representation. AR technology is the visual representation of superimposition of the virtual world and the real world. In automated driving simulation and visual representation, it is not enough to use VR vision to represent the reality. In the VR world, the driver's hands, feet, and various types of HMIs (such as the steering wheel, brake pedal, gas pedal, etc.) are three-dimensional objects that are simulated by computer. The behavior of the virtual object does not necessarily follow the driver's behavior, which brings unreality and makes the driver unable to adapt to the operation. Driving is a complex and semi-conditioned reflex-based operational behavior for humans. Any unreality will lead to differences in human subjective feelings, which will lead to differences in the quality of evaluation. PilotD also integrates AR technology into the driving simulator based on VR. The system automatically locates and reproduces the position of the off-site scene in the driver's perspective. The real HMI such as the steering wheel in the driver's view, as well as the hands or feet that operate on the real HMI, are real in the perspective. Thereby, the above discomfort is avoided, and the quality of subjective feeling measurement and evaluation is further improved. MR MR (Mixed Reality, Hybrid Reality/High Fidelity AR) technology is an improvement and enhancement of AR technology in terms of realism. Based on AR, MR will further analyze real-world information and more accurately embed the virtual world part generated in AR technology into the real world. The MR-based driving simulator will provide more powerful anti-interference capability and more perfect combination of real scenes in the cockpit and virtual scenes outside the cockpit to provide the driver with the most realistic driving experience.