Thermal sensation evaluation of passengers in vehicle based on SVM method

• 1、Automotive Engineering School,Chongqing University,Chongqing 400030
• 2、China Automotive Engineering Research Institute Co., Ltd, Chongqing 401122

Abstract：The evaluation model of the occupant\'s thermal sensation in cabin is an important aspect to study the thermal environment of the car and the comfort of the occupants in it. Through the subjective and objective tests of the occupant\'s thermal sensation in the real environment, the distribution and change of the thermal environment in the passenger compartment when heating through air-conditioning were tested, and the subjective thermal sensation of each part of the occupant was evaluated. According to the experimental results, the thermal environment of the passenger cabin and the subjective thermal sensation of the occupant were analyzed. It was found that the thermal environment in the passenger compartment showed transient inhomogeneity in the horizontal and vertical directions, and the subjective thermal sensation scoring rule of the occupant is basically the same as the air temperature distribution in the passenger compartment. The support vector machine(SVM) method was used to establish a dynamic thermal sensation evaluation model of the human body with those objective parameters (eg: air temperature around the human body, humidity in the vehicle, radiation temperature of the black sphere, metabolic rate of the human body, thermal resistance of the garment) in the cabin. The root mean square error (MSE) and the determinable coefficient (R2) were used to quantify the prediction effect of the evaluation model.The evaluation model can effectively predict the dynamic thermal sensation of various parts of the human body in the passenger compartment of the vehicle.

Keywords： Vehicle engineering Thermal comfort evaluation model Support vector machine Subjective evaluation