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When applying the permanent magnetic synchronous motors (PMSM) to refrigerant system, the suppression of speed ripples of the PMSM in low-feed range becomes the focus of consideration. The authors start with the generation mechanism and the periodical characteristics of the speed ripples to propose an adaptive control method. In the proposed method, the authors place a frequency variable resonance...
The retrofitted electro-hydraulic system and hardware architecture of control system for hydraulic robotic excavator was introduced; the model of electro-hydraulic system was derived according to the principle of LUDV system. on the base of the above and results of experiments, the model was simplified, and the reference model for control was given; An adaptive controller (AC) and the adaptive control...
This paper presents the experimental evaluation of a fuzzy sliding-mode control scheme. The control law consists of three parts: a nominal controller, a sliding-mode disturbance observer (SMDO), and an adaptive fuzzy sliding-mode controller (AFSMC) that is based on a T-S model. The nominal controller is employed to specify the desired closed-loop dynamics whereas the SMDO as well as the AFSMC are...
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