Study On Optimization Design And Motion Simulation For Arm-crossed Window Regulators

Motor vehicles-window glass has to ensure that drivers have sufficient security perspective. Besides that, the window glass should always be adjusted up and down for convenience and comfort. These functions are fulfilled by the motor vehicles-window regulators. As an automotive door attachment, motor vehicles-window regulator is one of the parts of automobile with high failure rate, because they usually work in tough conditions and are one of the most frequently used equipments. Most regulators are produced in small factories, which lead to the bad qualities also. With the development of the automotive industry, more and more requirements come out, such as the smaller installation space and stronger mechanical properties. Considering the manufacturing cost, the structure optimizing of motor vehicles-window glass becomes an important issue.In this paper, we are focused on the structural optimization and design in the ideal plane of the arm-crossed glass regulators.Glass regulator’s optimization design belongs to complex constrained nonlinear optimization design through analysis. The objective function is complex and the constraints are inequalities constraints. Compared with different optimization algorithms, we finally choose complex optimization method to optimize the structure of the arm-crossed window glass regulator.In this article we did force analysis and motion analysis. Motor torque equation is derived. The minimum ripple of the motor torque is used as the objective function in order to extend motors’work time and reduce the failure rate of the glass regulators. We still derived the mathematical relationship between the key points’displacement, velocity, acceleration and the various mechanism parameters. These provide a mathematical basis for the motion simulation.Based on the Visual C++6.0platform we designed a software for motion simulation and optimal design. According to the known conditions the car door provided, the software can output the results including each of the key points’displacement, velocity, acceleration curve and motor torque curve in the rise and drop process. The optimized results are much better than before. Compared to the traditional method using UG sketch constraints, the software can greatly simplify the design process and save time.Re-mold the regulator according to the optimized data and then draw the key points’ displacement, velocity and acceleration curves through the UG NX7.5motion simulation function. Compared the exported data and curves derived through the UG NX7.5motion simulation and the movement analysis, we can verify the formulas in the motion analysis are correct and the optimization results are reliable.In this subject, there are still some shortcomings yet, such as we only discussed the ideal job plane. But because the arms of the regulator are bending and many other factors, the actual work may be different from that in the ideal plane. So the scheme still needs to be improved in the future.