Journal
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
Volume 63, Issue 10, Pages 3434-3441Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAC.2018.2794826
Keywords
Digital communication channel; sliding-mode observer (SMO); state estimation
Funding
- National Nature Science Foundation of China [61473096, 61773131, 41676088, U1509217]
- Natural Science Foundation of Heilongjiang [JC2015015]
- Self-Planned Task [SKLRS201617B]
- State Key Laboratory of Robotics and System (HIT) [SKLRS2016KF03]
- Australian Research Council [DP170102644]
- 111 Project [B17048, B17017]
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This paper addresses the actuator fault estimation sliding-mode observer (SMO) design problem of linear continuous-time systems over digital communication channels. This problem frequently occurred in a network environment where data has to be quantized before being transmitted via digital communication channels. Traditional observers (linear Luenberger observer, Walcott-ZaK SMO) are not effective to solve this design issue since the effects of signal quantization will degrade estimation performances evidently. In this paper, a new descriptor SMO method is presented to overcome this difficult problem. It is shown that, if the quantizer density is larger than root 2 - 1, the designed observer can compensate quantization errors completely, and the fault vector can be reconstructed despite of signal quantization. Finally, a simulation example with the F-404 aircraft engine model is proposed to demonstrate the effectiveness of the proposed robust digital observer design approach.
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