Comparative Study on Cab’s H Point Design Model Based on Human Factors Engineering

In order to determine a suitable relative location of AHP and H point in the vehicle cab and improve the SAE standard design model, this paper modeled the H point which is suitable for Chinese according to human factor engineering principle. First, this paper optimized the location of H point by theoretical analyzing. It can be found that the dimension parameter of human body had an impact on H point location. Besides this, when compared this relationship with the SAE empirical formula, the reasonable ranges of vertical dimension between H point and AHP point are different. Then JACK was used to create Chinese male’s digital model models and their human percentile was set to 5, 50, and 95% which are representative. These models were used to simulate the location of AHP point and H point by evaluating, Comfort, Vision Zones, and Reach Zones. Least square method was used to process the location data and find the optimal H point. The result showed that the model to design H point for Chinese male in this paper was more reasonable than that in SAE. It can be used to design the driving cab for Chinese vehicles.