Modeling And Simulation Research On The Anti-pinch Algorithm Of The Power Window

With the rapid development of automobile industry, the vehicles are now experiencing the transition from purely mechanical products to the electronic automation products continuously. Currently, the electronical degree of the vehicle has become 40%~50% on average, part of high-grade cars even over 60%. Despite the complexity and functionality of our domestic automobile electronic products are getting more and more enhanced, but when comes to the reliability, there is still a big gap between ours and the foreigners which restricts the further development of our electronic products to a large degree.In order to improve the reliability of the anti-pinch module, this paper uses the Model-Based development to do modeling and simulation research on the anti-pinch control algorithm of power window, puts forward an improved control algorithm which takes the double standards of the force on the window to optimize the anti-pinch control, thus improves the reliability of the control system. Firstly, build the model of the power window system based on Simulink/Simscape/SimMechanics modeling and simulation environment which innovatively add the heat transfer process to the general model of DC motor. In order to ensure the effectiveness of the parameters of the model, use the Simulink Parameter Estimation tools to estimate the critical parameters of the model. After the analysis on the major power window anti-pinch control algorithms domestic and overseas, combined with the design requirement of the control system, come up with an improved DHSCD solution using the double Hall Sensors and current detection. The force on the window can be got directly after detecting the motor current. The position of window can be got through one of the double Hall Sensors and the force on the window through the other. Moreover, the movement direction of the window also can be calculated by comparing the phase differences of the pulse signal in two Hall Sensors. Based on the idea of this control algorithm, using Simulink/Stateflow event-driven logical modeling and simulation environment to establish the DHSCD anti-pinch control algorithm model of the power window. As soon as finishing the off-line simulation and verification of power window control algorithm on Simulink software platform, this paper proceeds with the semi-physical real-time simulation and validation process on dSPACE platform. After going through the rapid control prototype, automatic code generation, the hardware-in-the-loop simulation and validation processes, the whole process of product development has been realized. The results of the off-line simulation validation test and semi-physical real-time simulation test both show that the developed anti-pinch control algorithm using the Model-Based method achieves the reliability and environmental adaptability requirements of the main engine plants.This paper provides an effective idea and method to develop the more complex vehicle electronic products which gives some reference value to improve the reliability of our domestic vehicle electronic products.