The Software Of Measurement & Control System In Vehicle ABS Test-bed

The ABS used widely aboard because of the excellent instrument when vehicles in an emergent breaking. In foreign countries, there are Road Test and Bed Test in testing the function of breaking ability of whole car with ABS. The shortages of Road Test are high-investigation, high-expense, and low precision, easily affected by environment and not available for all vehicles. Thus the Road Test is not popular in domestic. However, how to practise the Bed Test is always a difficulty in China.According to the operational principle of ABS, this article raised the Bed Test that simulate the road adhesion coefficient by using the torsion controller and simulate the translation kinetic energy by flywheel group. The article not only developed a unit of dynamic brake process when the cars in various road adhesion coefficient, but also developed an experimental bed that can test the ABS working status when the wheels adhesion coefficient on road changes.On the basic of experimental bed, the article developed a system of bed auto control, auto guiding of test process, and breaking data auto-collecting, processing and analyzing. Thus, the article began with the operation principle of ABS, connected with Road Test and relating standards abroad and confirmed the test standards of the system and introduced the key Technology and operation principle of ABS experimental bed. Then the article centering on the test standards of the system and confirmed the data-collection of host computer and slave computer working independently and discussed the design of hardware and software of lower machine, including the structural whole of hardware, type-choosing if hardware equipment, building block design of CAN node. After finishing the design of slave computer, the article designed a reasonable test process according to the ABS auto test. The article also designed the software of the host computer and finished the vehicle checking and report, guidance of process, auto testing, data saving, report printing, etc. At last, the article analyzed the system function by part of the experimental data and proved that the system and complete the braking ability test for vehicles with ABS.