Application Analysis of the Fuel Viscosity and Temperature Control System Based on the Sliding Mode Theory

2012 ◽  
Vol 503-504 ◽  
pp. 1116-1119
Author(s):  
Zhuan Zhao Liu ◽  
De Shang Chang ◽  
Xin Jian Liu
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Sliding Mode ◽  
Variable Structure Control ◽  
Variable Structure ◽  
Fuel Oil ◽  
Temperature Control System ◽  
Structure Control ◽  
Heat Transfer Theory ◽  
Sliding Mode Variable Structure

With the shortage of the petroleum resources day by day, the fuel oil price is becoming higher and higher. The ship companies want to use the heavy diesel oil and inferior fuel with lower price for the marine diesel. Temperature is a variable with great inertia. Using the PID control algorithm, which will lead to the consequence of over correction in the controlling process, the advantage of sliding mode variable structure control is the small over correction. In this paper, based on thermodynamics and heat transfer theory, the mathematical model of temperature control system is built, the sliding mode movement equation and the sliding mode variable structure controller is obtained. This makes the application of temperature control take the advantage of sliding mode variable structure control.

scholarly journals An Investigation of a Nonlinear Fuel Oil Viscosity and Temperature Control System for Ships

2019 ◽  
Vol 95 ◽  
pp. 03006
Author(s):  
Zhuohang Ye ◽  
Xiaobing Mao ◽  
Hai Huang ◽  
Xianzhen Liu
Keyword(s):  
Heat Transfer ◽  
Control System ◽  
Sliding Mode ◽  
Variable Structure ◽  
Fuel Oil ◽  
Temperature Control System ◽  
Transfer Model ◽  
Oil Viscosity ◽  
Single Input ◽  
Sliding Mode Variable Structure

In this paper, the differential equation of the fuel oil viscosity and temperature control system was derived, according to the working processes and principles of the heating of heavy oil in ocean vessels. By analyzing the characteristics of the heat transfer model, a multi-input coupling nonlinear heat transfer model was developed, in which the temperatures at the inlet and the outlet of the heavy oil heater were used as the state variables, while the openings of the regulating valve of the mixed oil tank and the steam flow rate regulating valve of the heater were used as the control inputs. This model can be decomposed into a single-input nonlinear system and single-input second-order linear system for further investigation, and the sliding mode variable structure controller can then be solved by performing linear reductions on the nonlinear model. Finally, using KING VIKW software, experiments were performed in order to examine the controlling performances of the PID and sliding mode variable structure ( SMVS ) controller respectively. The results show that the sliding mode variable structure controller exhibits a series of superiorities, which mainly include a small overshoot, fast response and strong anti-interference capability.

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