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3 results on '"Amlashi, Nader Jamali Soufi"'

1. Robust Second Order Sliding Mode Control for A Quadrotor Considering Motor Dynamics

Author

Amlashi, Nader Jamali Soufi

Abstract

In this paper, a robust second order sliding mode control (SMC) for controlling a quadrotor with uncertain parameters presented based on high order sliding mode control (HOSMC). A controller based on the HOSMC technique is designed for trajectory tracking of a quadrotor helicopter with considering motor dynamics. The main subsystems of quadrotor (i.e. position and attitude) stabilized using HOSMC method. The performance and effectiveness of the proposed controller are tested in a simulation study taking into account external disturbances with consider to motor dynamics. Simulation results show that the proposed controller eliminates the disturbance effect on the position and attitude subsystems efficiency that can be used in real time applications.

Published
2020
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3. Nonlinear System Identification of Laboratory Heat Exchanger Using Artificial Neural Network Model.

Author

Amlashi, Nader Jamali Soufi, Shahsavari, Amin, Vahidifar, Alireza, and Nasirian, Mehrzad

Subjects
HEAT exchangers, SYSTEM identification, MATHEMATICAL models, ARTIFICIAL neural networks, NONLINEAR systems, TEMPERATURE measurements
Abstract

This paper addresses the nonlinear identification of liquid saturated steam heat exchanger (LSSHE) using artificial neural network model. Heat exchanger is a highly nonlinear and non-minimum phase process and often its working conditions are variable. Experimental data obtained from fluid outlet temperature measurement in laboratory environment is used as the output variable and the rate of change of fluid flow into the system as input too. The results of identification using neural network and conventional nonlinear models are compared together. The simulation results show that neural network model is more accurate and faster in comparison with conventional nonlinear models for a time series data because of the independence of the model assignment. [ABSTRACT FROM AUTHOR]

Published
2013

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