Enhancing Occupant Safety by Pre-active Seat Control for Out-of-seat Position before Autonomous Emergency Braking Operation

The pre-active safety seat (PSS) is a recently developed active safety system for securing occupant safety in out-of-seat position (OOSP), which was applied in the Hyundai Genesis G80 in 2020. However, there has not been sufficient quantifiable verification supporting the effectiveness of the PSS. The present study was performed to determine the effectiveness of the PSS for occupant safety in OOSP and to identify areas for additional improvement. Six test conditions were considered to determine the effectiveness of the PSS for augmentation of occupant safety in OOSP. Ten healthy men participated in the tests. Compared with the no PSS condition, maximum head excursion and neck rotation were significantly decreased in the PSS condition by 0.31–0.79-fold and 0.33–0.48-fold, respectively (p < 0.05). The PSS condition in which the seat pan was moved forward to the mid position showed a greater effect in reducing the characteristic motions related to submarining, compared with the condition in which the seat pan was moved rearward to the mid position (p < 0.05). These results suggested that PSS augments occupant safety in OOSP. This study provides valuable insights in ameliorating risks to the occupant in unintended seat positions before braking and/or collision.

The multi-functional design of child safety seat based on user demands

With the improvement in laws and regulations related to children's passenger car safety and full implementation of the two-child policy in China, more and more people are going to be paying attention to child safety seats. Therefore, there will be a huge market for child safety seats of China in the future. The child safety seats withe the single function of ensuring security can no longer meet the needs of parents and children, the multi-function complex product is becoming the development mainstream gradually. And they even began to pursue appearance molding of products. Most child safety seats on the market have only one function, which can be used in specific scenarios-cars, and after purchase, low frequency of use leads to increased cost. A multi-functional child safety seat is needed to meet the more advanced and increasingly diverse needs of users on this account. This research not only takes the needs of users in different scenarios as the entry point for the design, takes the multi-function of child safety seats as the subject, and combines the behavior and psychology of the user population of relevant disciplines such as ergonomics and design psychology, but also analyzes the potential and obvious needs of the user population for child safety seats, and optimizes the existing child safety seats on the market from the aspects of child safety seat functions and appearance, so as to further meet the modern higher level of demand for child safety seats.