Multi-function Platform-type Testing System for Vehicle Based on Virtual Instrument Technology

In allusion to the disadvantages of traditional platform-type vehicle testing system in expansibility and repeatability of test results,the multi-purpose platform-type vehicle testing system was developed based on virtual instrument technology.The PC-DAQ structure scheme was adopted for designing testing system,the sensors and mechanical parts of traditional platform-type testing system were reserved,a new DAQ card was used and a signal recuperation box was added for improving hardware performance.The master control software of testing system was developed based on LabVIEW8.2.The measuring accuracy of suspension efficiency and other indexes were improved by using the signal filtering and smoothing functions of LabVIEW and the intelligent method presented in this paper for identifying the characteristic data.Moreover,the new function for testing suspension natural frequency was developed.The testing results about kinds of vehicles showed the multi-purpose platform-type vehicle testing system achieved the expecting functions,the accuracy and repeatability of testing results was improved,functions of testing system were enhanced.