Fuel tank temperature control of a time-varying CubeSat model

2019 ◽  
Author(s):  
NAWAR AL-HEMEARY ◽  
GABOR SZEDERKENYI
Keyword(s):  
Temperature Control ◽  
Fuel Tank ◽  
Time Varying

Using a comb filter to describe time-varying biological rhythmicities

1980 ◽  
Vol 48 (3) ◽  
pp. 557-561 ◽  
Author(s):  
P. J. Brusil ◽  
T. B. Waggener ◽  
R. E. Kronauer
Keyword(s):  
High Pressure ◽  
Temperature Control ◽  
Research Unit ◽  
Internal Controls ◽  
Comb Filter ◽  
Time Varying ◽  
High Pressure Chamber ◽  
Internal Temperature ◽  
Microelectrode Recordings ◽  
Continuous Perfusion

A modular high-pressure chamber is described. This chamber will allow stable microelectrode recordings to be made for a variety of intracellular preparations at pressure of 200-300 atmospheres absolute. Its features include internal temperature control, easy visibility, continuous perfusion, electrical penetrations, and manipulation of several internal controls while the system is at pressure. The small size and high versatility of the Wilson chamber make it a convenient and inexpensive research unit for experiments in the moderately high-pressure ranges that affect biological preparations.

scholarly journals The PVC Stripping Process Predictive Control Based on the Implicit Algorithm

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Shuzhi Gao ◽  
Liangliang Luan
Keyword(s):  
Real Time ◽  
Predictive Control ◽  
Temperature Control ◽  
Temperature Control System ◽  
Generalized Predictive Control ◽  
Control Law ◽  
Time Varying ◽  
Time Model ◽  
Implicit Algorithm ◽  
Online Correction

According to the nonlinear and parameters time-varying characteristics of stripper temperature control system, the PVC stripping process Generalized Predictive Control based on implicit algorithm is proposed. Firstly, supporting vector machine is adopted to dynamically modelize for the stripper temperature; Secondly, combining with real-time model linearized of nonlinear model, a predictive model is linearized for real-time online correction. Then, the implicit algorithm is used for optimal control law. Finally, the simulation results show that the algorithm has excellent validity and robustness of temperature control of the stripper.

Melt Pool Temperature Control for Laser Metal Deposition Processes—Part I: Online Temperature Control

2010 ◽  
Vol 132 (1) ◽  
Author(s):  
Lie Tang ◽  
Robert G. Landers
Keyword(s):  
Temperature Control ◽  
Process Parameters ◽  
Process Model ◽  
Dynamic Balance ◽  
Metal Deposition ◽  
Time Varying ◽  
Laser Metal Deposition ◽  
Melt Pool ◽  
Melt Pool Temperature ◽  
Deposition Processes

Melt pool temperature is of great importance to deposition quality in laser metal deposition processes. To control the melt pool temperature, an empirical process model describing the relationship between the temperature and process parameters (i.e., laser power, powder flow rate, and traverse speed) is established and verified experimentally. A general tracking controller using the internal model principle is then designed. To examine the controller performance, three sets of experiments tracking both constant and time-varying temperature references are conducted. The results show the melt pool temperature controller performs well in tracking both constant and time-varying temperature references even when process parameters vary significantly. However a multilayer deposition experiment illustrates that maintaining a constant melt pool temperature does not necessarily lead to uniform track morphology, which is an important criteria for deposition quality. The reason is believed to be that different melt pool morphologies may have the same temperature depending on the dynamic balance of heat input and heat loss.

Design of Temperature Control System of Electric Boiler

2014 ◽  
Vol 1049-1050 ◽  
pp. 992-995
Author(s):  
Yan Xin Yu ◽  
Chun Yang Wang ◽  
Rong Chun Sun
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Control Algorithm ◽  
Simulation Experiment ◽  
Serial Communication ◽  
Temperature Control System ◽  
Time Varying ◽  
Control Performance ◽  
Advanced Control ◽  
Electric Boiler

The electric boiler as object controlloed has the characteristics of nonlinear, time-varying and large lag, and the temperature control system of it has been a challenge. In order to improve the control performance, a novel temperature control system was designed. The system consists of temperature controller, temperature acquisition, temperature display, serial communication, and warning circuit. The core controller was relized by DSP 2407, which can execute advanced control algorithm. A hybird control algorithm was presented, which mergeed PID and fuzzy control. Simulation experiment of PID and presented algorithms were carried on respectively, and the simulation results showed that the system designed has good dynamic and still performance. Furthermore, the system is simple and has a certain application value.

Research on Temperature Control System of Fruit and Vegetable Processing Line Based on Fuzzy Immune PID

2013 ◽  
Vol 420 ◽  
pp. 395-400
Author(s):  
Yong Ling He ◽  
Yuan Liu ◽  
Xiang Gui Wei ◽  
Qian Feng Zhang ◽  
Jie Ping Li ◽  
...  
Keyword(s):  
Control System ◽  
Water Temperature ◽  
Temperature Control ◽  
Pid Controller ◽  
Temperature Control System ◽  
Time Varying ◽  
Fruit And Vegetable ◽  
Processing Line ◽  
Processing Water ◽  
Mouth Feel

Temperature control has direct effect on mouth feel of fruit and vegetable processing products. This paper, by analyzing the control requirements of cucumber slices processing water temperature, proposes to control the water temperature for cucumber slice processing production line by using fuzzy immune PID. With the features of time-varying, nonlinear and hysteretic nature for temperature control, this paper designs fuzzy immune PID controller by borrowing the regulating action of immune system and linking the advantages of immune PID controller.

The Temperature Control of the Preheating Tank in the Procedure of Chloroacetic Acid’s Crystallization

2014 ◽  
Vol 989-994 ◽  
pp. 399-402
Author(s):  
Zeng Fang Wang ◽  
Chao Ying Liu ◽  
Xue Ling Song ◽  
Yu Xian Gao
Keyword(s):  
Time Delay ◽  
Detailed Analysis ◽  
Temperature Control ◽  
Pid Control ◽  
Control Method ◽  
Chloroacetic Acid ◽  
Time Varying

Based on detailed analysis of crystal process in Chloroacetic Acid (MCA)’s production, a certain control method is exert on it. In order to overcome the time delay ,large inertia, time-varying ,a fuzzy Smith intelligent method is proposed.Simulation results show that this method apparently is superior to the general PID control and Smith control.

Mathematical Model of Refueling Emission for Gasoline Vehicles and Influencing Factors Analysis

2014 ◽  
Vol 1070-1072 ◽  
pp. 1917-1924
Author(s):  
Jun He ◽  
Ren He
Keyword(s):  
Mathematical Model ◽  
Mass Transfer ◽  
Emission Rate ◽  
Fuel Tank ◽  
Time Varying ◽  
Average Temperature ◽  
Factors Analysis ◽  
Gasoline Vehicles ◽  
Reid Vapor Pressure ◽  
Simulation Results

In order to analyze the emission performance during the process of refueling, the mathematical models of refueling emission for vehicle under the proper simplified conditions were established based on the principle of time-varying and mass transfer in this paper. The models were applied to calculate the refueling emission rate of the fuel tank with and without a charcoal canister respectively, and simulation results of the model were analyzed numerically. Conclusions can be obtained as follows: the refueling emission rate of the fuel tank is 1.1201g / L without a charcoal canister; and 1.0815g / L with one, which is 3 - 4% less than the former on average. In addition, the refueling emission rate is positive related to the average temperature of the fuel tank, fuel average temperature and fuel Reid vapor pressure (RVP).

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