Showing 4 results for Soltanpour
Mohammad Veysi, Mohammad Reza Soltanpour,
Volume 14, Issue 4 (JIAEEE Vol.14 No.4 2018)
Abstract
The camera stabilizer stabilizes the camera’s line of sight by isolating the camera from the model uncertainties, disturbances of operating environment and system movements. This paper presents a voltage-base optimal adaptive fuzzy sliding mode control for camera stabilizer. In this proposed control method, a voltage-base sliding mode controller is applied. But unfortunately, undesirable control input chattering is caused by employing the sliding mode control. In the following, for the prevention of incidence of the control input chattering, a first order TSK fuzzy approximator is employed. Although fuzzy sliding mode control prevents the chattering phenomenon, it has some disadvantages such as disability in estimating the bounds of the existing uncertainties and lack of stability proof of the closed-loop system. In what follows, to overcome the aforementioned problems, an adaptive fuzzy system is designed such that it can estimate the bounds of the existing uncertainties. Ultimately, the chicken swarm optimization algorithm is utilized to determine the optimal values of coefficients of the adaptive fuzzy sliding mode control and to decrease the control input amplitude. To investigate the desirable performance of the optimal adaptive fuzzy sliding mode controller, simulations in four steps are implemented on a camera stabilizer.
Mohammad Veysi, Dr. Jamshid Aghaei, Dr. Mohammad Reza Soltanpour,
Volume 16, Issue 3 (JIAEEE Vol.16 No.3 2019)
Abstract
Takagi and Sugeno have proposed a fuzzy model for a continuous system in which disturbances are also considered as a time-dependent variable function in the consequent part of the fuzzy model rules. To eliminate the disturbances effect on the output of a system with a Takagi and Sugeno fuzzy model, researchers have proposed a linear matrix inequality-based minimization problem in which system parameters are directly present in the problem constraints. In electromechanical systems, the existence of parametric uncertainties such as uncertainties in the moment of inertia matrices and inaccuracy of actuators parameters cannot be neglected in any way. In this paper, at first, by solving an optimization problem, the upper bound of the uncertainties in the system parameters is determined, and the fuzzy model with disturbances is extracted in the presence of uncertainties. In the following, in order to eliminate disturbances in the presence of parametric uncertainties using a stable fuzzy controller based on the parallel distributed compensation, a minimization theorem based on the new obtained fuzzy model is proposed and its validity is proven. Finally, to evaluate the performance of the proposed controller, a boat-mounted camera stabilizer is used as a case study. The simulations results well demonstrate the favorable efficiency of the proposed controller in eliminating disturbances by taking into account the parametric uncertainties.
Dr Mohammadreza Soltanpour, Dr Hamidreza Radmanesh, Davoud Yousofian,
Volume 19, Issue 4 (JIAEEE Vol.19 No.4 2022)
Abstract
In the event of voltage sag at the nearing of a wind park, severe currents may pass through the power electronic devices of the Doubly Fed Induction Generators (DFIGs). Hence, according to the Low Voltage Ride Through (LVRT) requirements, the wind parks are allowed to disconnect from the network after a certain time. Therefore, to avoid such actions, the LVRT requirement of wind parks is considered to be enhanced in this paper. This aim is achieved by offering a novel objective function in order to find the optimum impedance of Superconducting Fault Current Limiter (SFCL). To evaluate the effectiveness of the proposed method, it is verified in MATLAB/SIMULINK and its great performance to amend the LVRT of such wind parks is corroborated by the simulation results.
Dr. Mohammadreza Soltanpour, Davoud Yousefian,
Volume 21, Issue 4 (JIAEEE Vol.21 No.4 2024)
Abstract
In this paper, a new designing procedure is proposed for the static ground power unit of airplanes. The proposed structure is generally made up of an input and output section, introduced as the dc and ac sides. In order to reach a superior rectifying operation, both six pulse rectifier and injection of third harmonic current have been considered at the dc side of the proposed ground power unit. In the ac side, a neutral point clamped inverter has been implemented to reach a high performance output required by the GPU. Every single part of the proposed configuration has been discussed, designed and presented including third harmonic injection method, inductors, dc link capacitors, the output filter and the isolation transformer. The proposed ground power unit has been simulated in Matlab/Simulink environment. The simulation results confirmed its superior performance by providing a standardized ac voltage at the output for GPU applications.
