scholarly journals Feedforward-Double Feedback Control System of Dual-Switch Boost DC/DC Converters for Fuel Cell Vehicles

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2886
Author(s):  
Wu ◽  
Yu ◽  
Du ◽  
Shi
Keyword(s):  
Control System ◽  
Fuel Cell ◽  
Feedback Control ◽  
High Efficiency ◽  
Control Method ◽  
Sliding Mode ◽  
Sudden Change ◽  
Step Response ◽  
Feedback Control System ◽  
Voltage Feedback

DC/DC converters for fuel cell electric vehicles need not only high boost ratio and high efficiency, but also strong anti-jamming capability. Therefore, it is especially important to devise a control method with strong robustness under the premise of an appropriate topology. In this paper, a simple dual-switch boost converter topology is adopted. We use the state space averaging method to build a small signal model, and based on this model, we propose a feedforward-double feedback control system for continuous conduction mode (CCM) mode. Simulation and experimental results show that the proposed feedforward-double feedback control system improves the robustness of the system while ensuring a high boost ratio and efficiency, and solves the problem of weak output characteristics of fuel cells. The control effect is similar to the sliding mode control, which is known for its robustness, while the rise time of step response is only 1/10 of that of the voltage feedback control system. When the output voltage of the DC/DC converter is 55 V, the DC/DC converter using feedforward-double feedback control system is more robust than the voltage feedback control system under sudden change of load.

Verifying and Simulating of the Novel Analytical Method of the Steady-State Error for Nonunity Feedback Control Systems

2011 ◽  
Vol 301-303 ◽  
pp. 1670-1675 ◽  
Author(s):  
Shann Chyi Mou
Keyword(s):  
Control System ◽  
Steady State ◽  
Feedback Control ◽  
Error Function ◽  
Step Response ◽  
Type Number ◽  
Feedback Control System ◽  
Feedback Control Systems ◽  
Definition Of ◽  
State Error

Traditionally, the first step to analyze the steady-state error of nonunity feedback control system is to convert the system into an equivalent unity feedback control system, and calculate the steady-state error by using the concept of type number for unity feedback control system. In 2011, Mou is based on the concept of old type number and the definition of new steady-state error functione(t)=(1/KH)r(t)-y(t) by Kuo to offer the method for calculating the steady-state error of nonunity feedback control system. In this paper, three typical examples will be analyzed by the calculation of step response and by the simulation of Matlab. Therefore, we can prove that the definition of new steady-state error function e(t)=(1/KH)r(t)-y(t) by Kuo and the concept of old type number are useful to solve the steady-state error of nonunity feedback control system.

Real-time feedback control system for ADITYA-U horizontal plasma position stabilisation

2021 ◽  
Vol 165 ◽  
pp. 112218
Author(s):  
Rohit Kumar ◽  
Pramila Gautam ◽  
Shivam Gupta ◽  
R.L. Tanna ◽  
Praveenlal Edappala ◽  
...  
Keyword(s):  
Control System ◽  
Feedback Control ◽  
Real Time ◽  
Feedback Control System ◽  
Plasma Position

Plasma Feedback Control System Design and the Results of JT-60U

1992 ◽  
Vol 21 (3P2A) ◽  
pp. 1624-1629 ◽  
Author(s):  
M. Matsukawa ◽  
H. Ninomiya ◽  
H. Horiike ◽  
N. Hosogane ◽  
R. Yoshino
Keyword(s):  
Control System ◽  
Feedback Control ◽  
System Design ◽  
Control System Design ◽  
Feedback Control System

Simplified feedback control system for scanning tunneling microscopy

2021 ◽  
Vol 92 (10) ◽  
pp. 103705
Author(s):  
Francisco Martín-Vega ◽  
Víctor Barrena ◽  
Raquel Sánchez-Barquilla ◽  
Marta Fernández-Lomana ◽  
José Benito Llorens ◽  
...  
Keyword(s):  
Control System ◽  
Feedback Control ◽  
Scanning Tunneling Microscopy ◽  
Scanning Tunneling ◽  
Feedback Control System ◽  
Tunneling Microscopy

THE ROTATIONAL EFFECT OF MAGNETIC PARTICLES ON CELLULAR APOPTOSIS BASED ON FOUR ELECTROMAGNET FEEDBACK CONTROL SYSTEM

2021 ◽  
pp. 2150045
Author(s):  
Jia Ji Lee ◽  
Chang Hong Pua ◽  
Misni Misran ◽  
Poh Foong Lee
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Control System ◽  
Feedback Control ◽  
Cell Apoptosis ◽  
Magnetic Particles ◽  
Drug Carriers ◽  
Feedback Control System ◽  
Rotational Effect ◽  
Dynamic Magnetic Field

Objectives: Magnetic drug targeting offers the latest popular alternative option to deliver magnetic drug carriers into targeting region body parts through manipulation of an external magnetic field. However, the effectiveness of using an electromagnetic field to manipulate and directing magnetic particles is yet to be established. Methods: In this paper, a homemade cost-effective electromagnet system was built for the purpose of studying the control and directing the magnetic drug carriers. The electromagnet system was built with four electromagnetic sources and tested the capability in directing the particles’ movement in different geometry patterns. Besides that, the creation of the self-rotation of individual magnetic particle clusters was achieved by using fast switching between magnetic fields. This self-rotation allows the possibility of cell apoptosis study to carry out. The system was constructed with four electromagnets integrated with a feedback control system and built to manipulate a droplet of commercially available iron (II, III) oxide nanoparticles to steer the magnetic droplet along different arbitrary trajectories (square, circle, triangle, slanted line) in 2-dimensional. Results: A dynamic magnetic field of 25 Hz was induced for magnetic nanoparticles rotational effect to observe the cell apoptosis. A profound outcome shows that the declining cell viability of the cell lines by 40% and the morphology of shrinking cells after the exposure of the dynamic magnetic field. Conclusion: The outcome from the pilot study gives an idea on the laboratory setup serves as a fundamental model for studying the electromagnetic field strength in applying mechanical force to target and to rotate for apoptosis on cancer cell line study.

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