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This paper presents a high performance torque control of Permanent Magnet Synchronous Motors using a real time simulator with a Finite Element Analysis (FEA) based motor model. This model can simulate some behaviors of the actual motor includes nonlinear characteristics such as spatial harmonics and magnet saturations. Therefore, a model based control developed with FEA based motor model takes some...
The method based on a forecast model of multivariate nonlinear regression is presented for study on influence factors of cutter head torque and solve the problem of estimating the torque accurately. By comprehensive consideration the influences of geological parameters, driving parameters and cutter head structure parameters, the regression forecast model is established based on theoretical calculation...
Single Gimbal Control Moment Gyroscopes (SGCMG) can could provide large control torque and quick attitude maneuver rate to small satellites without any increase in power, volume and mass, which will help small satellites become more powerful. Singularity avoidance and failure steering are two important problems to SGCMGs and also the main focus in this field. A new united steering law for SGCMGs with...
Purpose: to study the performance of DTC system (direct torque control) within the Motorized Spindle full-speed range, and to improve the observation precision of Motorized Spindle stator flux by adopting the Full-order stator flux observer. Method: construct a Motorized Spindle DTC system based on the mathematical model of Motorized Spindle under a static stator reference frame; revise the deviation...
Running of unstable speed exhaust turbine generator (ETG) using main engine (ME) waste heat by high turbulence intensities, in order to demand maximization of regenerative energy harvested from the ME waste heat and minimization of damage caused by mechanical losses and fatigue. ALQG control scheme for output power leveling with unknown dynamics is proposed in this paper. The control scheme applies...
This paper presents an approach to a methodology for design, analysis and optimization of haptic devices. This approach roughly divides the design process into; device requirements, conceptual design, device design, control design and finally building a prototype of the device. In addition, we have applied the first two phases of this methodology, i.e. device requirements and conceptual design on...
This paper presents a novel method in which eddy current losses in a solid rotor direct torque controlled synchronous machine are found by utilizing a combination of analytical and FEM (finite element method) simulations. The method is presented along with the results obtained. The article also briefly presents a new method in which 3D (three dimensional) current flows can be modelled using a 2D (two...
Cogging torque is a parasitic element that causes mechanical vibration, noise and undesirable starting effects in permanent magnet (PM) machines. Significant design efforts, therefore, are made to minimize cogging torque in high performance PM machines. In this paper, several cost effective displacement techniques are proposed for the design of axial-flux surface-mounted permanent-magnet (AFSMPM)...
This paper presents a switched reluctance machine model based on an invertible expression representing the torque-phase current relationship. The model can be useful for real-time control in high-performance applications when the command current is derived from the torque command. The two angular functions that the model requires as input can easily be calculated from the known static torque-position...
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