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In this paper, a mechanical model for a half-tracked vehicle with eight degrees of freedom is established. A scheme of active disturbance rejection control (ADRC) is first presented to control the vertical motion and pitching angle of the tracked vehicle. The inner parameters uncertainty and the external disturbances are estimated as the total disturbances by using extended state observer (ESO) and...
This paper concerns with the condition for absolute stability of nonlinear active disturbance rejection control (ADRC) for SISO systems. Firstly, a nonlinear ADRC system for a linear plant is transformed into the form of a Lurie system, for which the off-axis circle criterion is applied and a sufficient condition is obtained. Furthermore, for comparison, the circle criterion and Popov criterion are...
The paper brings forward the way of semiautomatic semantic annotation of emergency event case, give out the upper ontology, mid-level ontology and domain ontology of emergency event, provide a mechanism of annotating key elements in an emergency event case, such as concepts/instances, relation among concepts/instances, and geo-spatial information.
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