Integrative Modeling Method Based on Empirical Mode Decomposition and Least Square Support Vector

Machines about Dynamic Weighing of Loaders

WANG Wei¹  WEI Hongxing²  CHEN Diansheng²  WANG Tianmiao²

(1. College of Engineering, China Agricultural University, Beijing 100083;
2. School of Mechanical Engineering and Automation, Beihang University, Beijing 100083)

Abstract: For dynamic weighing about loaders, to obtain a quick and exact measure result synchronously is a complex problem. Based on an existent dynamic weighing method about loaders, an original integrative modeling method for dynamic weighing is given. In the method, empirical mode decomposition is used to be the signal processing method for local pressure signal contaminated; and the least square support vector machines is used to be learning machine for dynamic pressure compensation varying with different lift crane velocity; also the Bayesian evidence framework for selecting and tuning parameters of least square support vector machines; Finally, after doing some simple linear proportional calculation, the weight of load is obtained. In the end, emulation analysis and test results all indicate that by using the above modeling method, measure precision within 1% can be obtained.

Key words: Loaders  Dynamic weighing  Integrative modeling method  Empirical mode decomposition  Least square support vector machines Bayesian evidence framework

CLC No: TH823

国家高技术研究发展计划资助项目(863计划，2003AA430110). Received 20070312, received in revised form 20071012