Abstract

The design of brake is one of the most initial parts in automotive design. In the period of design, road tests are not available. Therefore, simulation experiment on designed road test is conducted by specialized brake tester. Based on observable quantity and brake theories, this thesis lays out the relationship among all torques: Mb =Mz ‐Mq = J d dt   , and the differential equation model is I 20 dt Jdn    , which indicates that driving current depends on mathematical model of observable quantity. Moreover, on the given condition, the driving current is calculated as 174.205A. Next, the time is equally divided into n pieces of time segments. With the aid of k, the simulation coefficient of inertia, energy relation is founded. Then, instantaneous rotational speed in the previous time segment iterates the energy Bi J needed for current time segment by the utilization of MATLAB software. The model integral is used to draw out the relationship between current and observable quantity, and current of this time segment is calculated by previous time segment observation data.

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