Faults detection and isolation using reduced-order state observers / Detecção e localização de falhas via observadores de estado e de ordem reduzida

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

The development of new faults detection techniques is necessary because of increasing demands from industries on reliability and safety in mechanical systems. They must be supervised such that occurrence of failures can be accommodated as quickly as possible because they can cause an unacceptable deterioration of the systems performance. In this work, we have developed a methodology to Detect and Isolate Faults in mechanical systems using reduced order state observers. We can monitor unmeasureble variables and the method selects the parameters from components that may fault during the process and constmcts an otimized global observer to analyze alI the system considering random noises in the excitation, in the response and sensor faults. To isolate component failures via robust observation, an automatic system with a bank of detection observers is constmcted, where each observer is only sensitive to one specified component failure while robust to alI other component failures. We have analized the transient and steady-state performance by exciting the system with impulsive force, sinosoidal force, random noise etc. The results were good when we compare them with other methods and we have verified the results through a testing rig

ASSUNTO(S)

system identification falha de sistema (engenharia) identificação de sistemas estimativa de parametro system failures (engineering) parameter estimation

ACESSO AO ARTIGO

Documentos Relacionados