Low Speed Control of an Autonomous Vehicle by Using a Fractional PI Controller

Optimization techniques are increasingly used in research to improve the control of three-phase induction motor (TIM). Indirect field-oriented control (IFOC) scheme is employed to improve the efficiency and enhance the performance of variable speed control of TIM drives. The space vector pulse width modulation (SVPWM) technique is used for switching signals in a three-phase bridge inverter to minimize harmonics in the output signals of the inverter. In this paper, a novel scheme based on particle swarm optimization (PSO) algorithm is proposed to improve the variable speed control of IFOC in TIM. The PSO algorithm is used to search the best values of parameters of proportional-integral (PI) controller (proportional gain (kp) and integral gain (ki)) for each speed controller and voltage controller to improve the speed response for TIM. An optimal PI controller-based objective function is also used to tune and minimize the mean square error (MSE). Results of all tests verified the robustness of the PSO-PI controller for speed response in terms of damping capability, fast settling time, steady state error, and transient responses under different conditions of mechanical load and speed.

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Design and Fabrication of Two Step Speed Control of a Cylinder Circuit using Pneumatics

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f1149.0886s219 ◽

2019 ◽

Vol 8 (6S2) ◽

pp. 512-516

Keyword(s):

Flow Control ◽

High Speed ◽

Air Flow ◽

Control Valve ◽

Speed Control ◽

Flow Control Valve ◽

Push Button ◽

Low Speed ◽

Flow Through

The main aim of our project is to design and fabrication of pneumatic two step speed control of a cylinder. Initially the flow from the FRL retracts the cylinder when the push button is in its spring offset position. When it is pushed the flow pilots actuate. The air passes through the flow control and shuttle valve. Then the cylinder extends with high speed as the valve allows more air to enter the cylinder. When the piston reaches the position it operates the cam push button and pilot air flow through this and actuate 5/2 pilot operated valve and reaches flow control valve which permits less air. Then the flow through enters the shuttle valve to cylinder and allows the cylinder to extend at relatively low speed. At the end of extension stroke deactivating push button retracts the cylinder. Thus the speed of cylinder is controlled and project can be achieved

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Design and Simulation DFIM Driven Electrical Vehicles Based on IP Controller

AIUB Journal of Science and Engineering (AJSE) ◽

10.53799/ajse.v17i2.8 ◽

2018 ◽

Vol 17 (2) ◽

pp. 43-50

Author(s):

Al-Mayhedee Zubair ◽

Mohammad Abdul Mannan ◽

Junji Tamura

Keyword(s):

High Performance ◽

Speed Control ◽

Pi Controller ◽

Human Beings ◽

Environment Friendly ◽

Fundamental Goal ◽

Electrical Vehicles ◽

Electrical Vehicle ◽

High Performance Application ◽

Control Application

The environment friendly blessings of Electrical Vehicles (EV), human beings are becoming extra involved in the use of them alternatively than the usage of mechanical differentials. In electrical vehicles distinct sorts of electrical machines are used among them DFIM is used in this work. The challenging work is to design of a controller as the output of the motor has to match with vehicle input. So, far, most of the mentioned works have utilized Proportional-Integral (PI) controllers as the speed control. But, the negative aspects of PI controller are properly known, as its design depends on the specific motor parameters and the overall performance is sensitive to system disturbances. The fundamental goal of this paper is to replace the conventional PI controller by means of an IP controller which is successful of dealing with exceedingly non-linear DFIM motor for high performance application in Electrical Vehicle. The effectiveness of designed IP controller of an electrical differential for an EV system is evaluated through Matlab/Simulink software. In simulation work different road conditions for EV are considered. After the simulation the designed controller is found to be strong for the speed control application of Electrical Vehicle.

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