Research On The Key Technologies For The Design Of Vehicle Electromagnetic Brake And Intergated Design Environment Construction

Electromagnetic brake has been widely used in the tractor/trailer braking system abroad, as one of critical parts in automobile, the performance of it influences the safety performance of automobile directly. In nowadays, with the development of automobile, higher performance, lower cost, and shorter lifecycle have become new requirements for the designing of electromagnetic brake. Consequently, the computer aided design technology is an instant need to provide the technical support.With a purpose to establish an integrated design environment for the designing of electromagnetic brake, the key technologies related are researched in this paper. The main contents and contributions of the paper are summarized as follows:The matching technology between drum electromagnetic brake and vehicle is studied and the braking force distribution coefficient of the tractor and trailer is confirmed. According to the related standard, the mathematic model of the braking moment which the electromagnetic brake should provide has been ascertained using the matching theory. The matching technology of trailer train brake system has been introduced in the type selection and analysis of the brakes. The algorithm flow of the vehicle matching module of the intergated design environment has been given.Based on the study and analysis of mechanical theory of electromagnetic brake, an applied formula of brake factor is provided in this paper. Based on the analysis of sensibility about drum electromagnetic brake to brake factor, the structure parameters for optimization and mathematic model of the drum brake are ascertained taking the braking efficiency as optimum goal. The optimization algorithm of the structure parameters based on the tools of Matlab is also presented. The virtual prototype of electromagnetic brake is built using ADAMS. The effectiveness of optimum design method and the validity of virtual prototype are verified by comparing the braking performance around optimization.Based on the study of the brake mechanism, the work posture and wear performance of the electromagnet are analyzed, and the optimum design plan of electromagnet is proposed to realize the even wear of the electromagnet surface and decrease the revolving tendency. Based on the unsymmetrical design of magnetic circuit by means of slotting inside, the theory slot area is calculated. As the complex shape of the magnetic circuit, by using the electromagnetic analysis software Maxwell 3D for the simulation analysis, the simulation results amend the theoretical analysis to achieve the best unsymmetrical structures. By wearing comparison of the symmetrical and unsymmetrical electromagnet, the testing result indicates that the unsymmetrical electromagnet obviously surpasses the symmetrical structure and optimum design plan is reasonable. For the brake, based on going deep into analyze robust design on losing model, this paper founds mathematic model on brake, and separates all factors which can influent the quality of output into under-control factors and noise factors, then confirms the center values and fluctuations of each factor. Thereafter, via orthogonal test, works out the test results. At last, through intuitionist analyses or differential analyses, the significant degree of each factor in influent the test result and the contribute ratio of each factor in influent the quality of output can be known. For the electromagnet, based on going deep into analyze robust design on response surface model, this paper gets test results about electromagnet through orthogonal test, and gained response surface model with regressive method. Combining traditional robust design methods with modern calculate methods; this article gets robust points and output of electromagnet under correlative optimization functions in Matlab.An analysis on the electromagnetic brake design process and its influence factors are given and it is followed by an intense study on the connotation of the integrated design environment; on the basis of which this paper demonstrates the electromagnetic brake design process in the integrated design environment. In addition, the operation architecture and the system architecture of the integrated design environment are further build with an analysis of the architecture features.By analyzing the basic data elements and models of electromagnetic brake design process, this paper presents a multi-view integrated data model consisting of organization, process and product views. Meanwhile, a data consistency management method based on the databased master model is addressed. The method of the application integration based on component technology thought and the formalization definition of software components are presented. The component interface developing criterion is proposed as well. Taxonomic approach, principle of the component and implementation of component's interoperability are introduced. The technology of the integration of related software has also been discussed. At last, by applying the theories and methods studied above to practice, the research offers an integrated design environment of electromagnetic brake, the effectiveness and practicality of the research result are verified.