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The problem of Path-contouring Control of dual arm robot manipulators is defined by the equivalent contour errors determining the desired path. Equivalent errors approach utilizes the n − 1 equivalent contour error in terms of algebraic equation and one tangential error to obtain the new nonlinear coordinate system. It becomes the problem of stabilization of Path-contouring Control. As a result, the...
This paper proposes the combining of μ-synthesis robust repetitive control and feedforward control scheme to the design of constant sinusoidal voltage tracking for a stand-alone three-phase constant voltage inverter. The controller designed problem is defined in the form of two-degree-of-freedom feedback-feedforward controller. The D-K iterative algorithm is used to solve for both parts of the controller...
This paper shows a PI with phase-lead controller design using convex-concave optimization. The phase-lead term is added to reduce a high frequency measurement noise effect. By fixing all parameters of the phase-lead part, the optimization program searches the remain parameters subject to robustness constraints. The optimization constraints are functions in a frequency domain. The design problem can...
This paper presents the online identification method for interior permanent-magnet synchronous motor (IPMSM) drive system with the maximum torque per ampere (MTPA). The inductances of the motor are identified by recursive least square (RLS) method based on mathematical model, considering the flux saturation state. Using this technique, the improvement of the MTPA trajectory for IPMSM can be implemented...
This paper presents a robust control strategy for voltage controller of grid-connected inverter. The combining of feedback-feedforward control and ℋ− repetitive control is introduced to improve tracking performance and reduce the period disturbance. The achieved objective is robustly regulate voltage, good dynamic and tracking response. The proposed controller is tested in simulation by MATLAB/SIMULINK...
This paper presents a robust control strategy for voltage controller of grid-connected inverter. The combining of feedforward control and H∞ repetitive control is introduced to improve tracking performance and reduce periodic disturbance. The feedforward part of 2DOF controller extends gain and tracking bandwidth of the feedback controller when comparing to 1DOF controller. The proposed controller...
This paper presents an application of LPV input-output model identification and LPV controller synthesis to a turbocharged spark ignited combustion engine with experimental results. The complexity of identified LPV input-output models is reduced using parameter-set mapping in combination with nonlinear optimization. A model-structure suitable for a direct transformation to a polytopic LPV state-space...
This paper presents a system stability analysis of a grid-connected inverter from a linear system viewpoint. A Photovoltaic (PV) inverter model is derived using a system identification method, specifically the Hammerstein-Wiener model. The PV inverter is supplied by a controllable DC power supply and the inverter output is connected to a 220 V utility grid. The input and output characteristics on...
Long‐span bridge girders can show dangerous instable flutter vibrations caused by aerodynamic forces due to very strong winds. The control objective of flutter control is to enhance the structure‐dependent and control‐dependent critical wind speed of flutter onset. An active mass damper system with two eccentric rotational actuators (ERA) is presented for flutter control. By using a bridge girder...
This paper presents a precise harmonic current control for shunt active filters (SAF) based on the robust control design. To ensure robust stability causing by system uncertainties and tracking performance, the robust control employing a two-degree-of-freedom ℋ∞ control method is designed to accurately track harmonics generated by nonlinear loads in power system. The controller is synthesized by using...
This paper presents an application of linear-Parameter-Varying (LPV) control to solve the torque vectoring problem of a through-the-road hybrid electric vehicle (TtR-HEV). To achieve high performance both in reference tracking and disturbance rejection, a two-degree-of-freedom LPV self-scheduled controller is synthesized by using mixed sensitivity loop shaping. The controller is based on a single...
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