A Novel Approach to Predicting the 6 Axes Pose of Engine Systems Using Optical Measurement System

Abstract

While electrification represents the biggest technological development in automotive power trains in decades, there is still significant uncertainty as to when large-scale adoption of electric vehicles will occur. The Hybrid electric vehicle, on the other hand, will have developed and produced, accounting for more than 80% of the total production volume till 2050 according to a lot of survey. The Hybrid electric vehicle (HEV) is a hybrid vehicle that combines a conventional internal combustion engine (ICE) and the electrical propulsion system. Therefore the automotive components related to the movements of the internal combustion engine are still bound to prove the durability in itself amid the growing demand of prolonged fatigue life. Sophisticated six degrees of freedom (DOFs) movement is required in Cartesian spaces. However the development span is getting shorten as the test vehicle is seldom available for the measurement and testing to achieve the cost saving. In order to cover all given conditions, new way to identify the durability of the component at initial development stage should be imposed to conduct the development without loss. Recently, the optical deformation measurement system which is the method to measure the motions of the engine was introduced to comply with this request. In order to apply this optical measurement system to the durability estimation of automotive parts connected to the engine, two important points were investigated in this study: First, a constant Jacobian method is proposed to solve the forward kinematics problem without an iterative process by calculating 6 DOFs deformations in a faster and more stable numerical method. Second, the method imposed in this paper can improve much more accurate estimation of durability when compared with the previous commercial method estimating durability with deformation induced by only the engine roll.