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Contouring control is crucial in high-speed and high-precision manufacturing. In this paper, a novel task polar coordinate frame (TPCF), moving along the desired contour, is proposed to naturally calculate and control the estimated contouring error by the circular approximation, a second-order approximation. The dynamics in the world Cartesian coordinate frame is transformed into radial and angular...
A novel variable structure active-disturbance rejection position controller of permanent magnet synchronous motor (PMSM) servo system is presented in this paper. Not only maintaining the original features of controller, but also reducing the adjustable parameters, based on the variable structure designing. Through the analysis of cross-axis output equation, proposing a new position variable structure...
This paper describes the MTPA (maximum torque per ampere) control strategy of Salient-pole PMSM (permanent magnet synchronous motor) and its flux-weaking control strategy. Salient-pole PMSM often used the MTPA control strategy, the method that MTPA curves obtained from look-up table is usually used, but it will reduce the real-time performance and reliability of the system. In this paper, electromagnetic...
The evidential reasoning theory is often used to process the decision information in decision support. The evidential reasoning is qualified in dealing with uncertain information. However, its combination rules always have some limitations in processing conflict information. In order to solve the conflict problem in the combination of multi-source information, this paper analyzed the conflict solutions...
This paper deals with the conceptual design and kinematic analysis of a novel 2-DOF translational parallel robot for pick-and-place operations named as T2. The proposed architecture is composed of two actuated kinematic chains in the vertical plane and a passive chains in the transversal plane to make the orientation of the moving platform unchangeable. It not only has high speed and high acceleration,...
Introduced a new type of maximum power point tracking strategy (MPPT) based on variable step hill-climb which use power perturbation to search for maximum power and record the maximum power related to the turbine speed. Besides, adopted power feedback control for maximum power control based on direct-driven wind turbine with permanent magnet synchronous generator (D-PMSG). The algorithm was proved...
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