Design Of Test Rig For Pedal Control Mechanism And Research On Its Key Technologies

Take the test rig for pedal control mechanism of automobile as the research object. The studies have been carried out in depth on innovative mechanical system design and on the electrical control system that based on the virtual instrument technology and on the pedal force servo control strategy based on the brake system of automobile. The main research contents are in the following aspects:Based on the communication with the enterprise, and combined with the step device performance requirements and bench test method QC/T788-2007 and vacuum booster detection requirements QC/T307-1999 and so on, designed a new type of test rig. Which is highly integrated that can detect performance of such as pedal control mechanism, vacuum booster, master cylinder and wheel cylinder. And it has a four freedom movement system to make the testing work of different kinds of pedal system convenient. This test rig was been analyzed by ANSYS finite element software, and the results had verified the reliability of the experimental platform solutions.The electric control system that based on the man-machine engineering and LabVIEW virtual instrument technology has been completed, including hardware circuit design and upper and lower controller software system development. Making full use of modular design method, divided the test rig into nine project testing module and one adjustment module to make the test operation interface friendly and intuitive for the convenience of users. Mining the advantage of LabVIEW graphical programming language to realize the real-time display and storage of the test data and make each project can generate standardized testing report for print or storage. And it was designed with a malfunction self-monitoring system that can prompt users how to solve the problems.The brake pedal force servo loading control strategy was studied. from the loading force then analyze the brake pedal system performance. According to the complexity such as large displacement of actual operating, this study introduced artificial immune controller into the single neuron PID (SNPID) to constitute the immune single neuron PID controller (ISNPID) to control the loading force. Simulation and experimental results indicate that the ISNPID has improved the system robustness. And to some extent, ISPID solved the contradiction of SNPID system between response speed, robust and control accuracy.