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In this paper, an Active Disturbance Rejection Controller (ADRC) is introduced into the system named the dredger cutter motion control, aiming at achieving the cutter motor synchronous speed control precisely. Because the load power of cutter motor may changes drastically at work, it is important that the parallel drive of two cutter motors is designed to keep the system secure and ensure its reliability...
In order to improve the efficiency of the Radar circuit maintenance, in this paper, based on PXI & GPIB Hybrid Bus and virtual instrument technology, a fault diagnosis platform for Radar circuit is developed, and also a fuzzy fault tree reasoning algorithm is presented. This platform is composed of two parts: hardware and software. The hardware consists of a built-in controller and 3 kind of virtual...
In order to improve the ability of fault prognostic and the efficiency of fault diagnosis for certain AEW (airborne early warning) radar, in this paper, an APSO-LSSVM (adaptive particle swarm optimization- least squares support vector machine) fault prognostic algorithm and a fuzzy reasoning algorithm are presented, and an expert knowledge database is constructed too. Based on the APSO-LSSVM fault...
The paper analyzes the theory of generating short circuit current during three-phase fault to research the low voltage ride through (LVRT) control of doubly fed induction generator (DFIG). The approximate analytical expressions of short circuit current are given in the condition of no load and synchronous speed to simplify the analysis. Based on this, the influences of different pre-fault conditions,...
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