Simulation results demonstrate that the proposed observer can detect the faults sensitively, and the influence of unknown disturbance on residual error can be restrained to a given range.
The loss of strength due to the strong disturbance of underlaying residual soil by the excavation of foundation trench shall cause obvious settlement of cushion cap with its gravity.
由于基槽开挖对下卧层残积土的强烈扰动导致强度丧失，造成承台在自重下明显沉降。
3
Then the design of fault detection filter with robust eigenstructure assignment is investigated in a class of residual signal for the unknown input disturbance can not be completely decoupled.