Pi Research Papers - Academia.edu (original) (raw)

The epidermal growth factor receptor 1 (EGFR) is overexpressed in various malignancies and is associated with a poor patient prognosis. A small, receptor-specific, high-affinity imaging agent would be a useful tool in diagnosing malignant... more

The epidermal growth factor receptor 1 (EGFR) is overexpressed in various malignancies and is associated with a poor patient prognosis. A small, receptor-specific, high-affinity imaging agent would be a useful tool in diagnosing malignant tumors and in deciding upon treatment and assessing the response to treatment. We describe here the affinity maturation procedure for the generation of Affibody molecules binding

Boiler control in a power station is a very important criteria in regulation of uninterrupted electricity. In existing power plants, the control of its features and parameters are done by PI and PD controllers. The parameters that control... more

Boiler control in a power station is a very important criteria in regulation of uninterrupted electricity. In existing power plants, the control of its features and parameters are done by PI and PD controllers. The parameters that control the regulation of boiler conduction are drum level, steam flow, feed water flow, steam temperature and light intensity. It is necessary to produce the steam required to run the generator. When the load in the generator changes, there must be corresponding change in the steam volume. This may cause adverse effect in the boiler. In order to avoid the effect in the boiler, the parameters mentioned above must be maintained constant, which is attained by regulating the corresponding valves. This project work has a feasibility of using fuzzy logic controllers in the place of conventional controllers is done by using embedded system. It is found that the rule based fuzzy logic technique can be implemented by stringent operating conditions.

This paper proposes the artificial neural network based controller for speed control of a separately excited DC motor. The Artificial Neural Network controller allows controlling both type of systems i.e. linear and non-linear... more

This paper proposes the artificial neural network based
controller for speed control of a separately excited DC motor.
The Artificial Neural Network controller allows controlling both
type of systems i.e. linear and non-linear system by training the
network. So it is a novel approach to study and a broad research
area.
In this paper three controllers “PI, PID, ANC” have been
designed and implemented in the MATLAB /Simulink model to
examine the performance of DC motor with different loads. The
results show that the ANC give better response compared to PI &
PID controller.

Vedat Güntay ve Gamze Yılmaz Güntay tarafından kaleme alınan 2019 tarihli makale ve Alev Fatoş Parsa ve Ersin Akçora tarafından 2016 tarihinde yazılan makaleler Dijital Efekt Uygulamaları kapsamında değerlendirilmeye çalışılmıştır.... more

The design of intelligent control systems has become an area of intense research interest. A promising direction in the design of intelligent systems involves the use of Fuzzy logic controller to discover the abilities of... more

The design of intelligent control systems has become
an area of intense research interest. A promising direction in the
design of intelligent systems involves the use of Fuzzy logic
controller to discover the abilities of intelligent control systems
in utilizing experience via rule-based knowledge.
The most commonly used controller in the industry field is
the proportional plus- integral-plus- derivative (PID). PID
controller requires a mathematical model of the system while
Fuzzy logic controller (FLC) provides an alternative to PID
controller, especially when data are not available or partly
available for the system.
For comparison purpose, three controllers PI, PID and FLC
have been designed and implemented in the MATLAB/Simulink
model to examine the performance of DC motor with different
loads. The results show that the FLC give better response
compared to PI &PID controller.

This Review Paper introducing the modeling of Brushed DC motor and different PID control techniques. A brushed DC motor is commutated an internally which is electric motor designed to be run by a direct current power supply. A Brushed... more

This Review Paper introducing the modeling of Brushed DC motor and different PID control techniques. A brushed DC motor is commutated an internally which is electric motor designed to be run by a direct current power supply. A Brushed motors were the first commercially important application for convert electric power to driving mechanical loads, and DC power distribution systems were used for more than 100 years to operate motors in commercial and industrial Applications. A conventional brushed DC Motor consist basically two parts,first one is the stationary body of the motor called the Stator and the other one is inner part which rotates producing the movement called the Rotor or " Armature " for DC motors. For the motion control of DC motor in almost applications, PID controller is used. The PID controllers have a long history in control engineering and they have been proven to be robust, simple and stable for many real world applications. Roughly, P action is related to the present error, I action is based on the past history of error, and D action is related to the future behavior of the error. From estimation point of view P, D, and I correspond to filtering, smoothing and prediction problems respectively.This control mode is combination of the Proportional, the Integral, and the Derivative mode. This is most powerful but complex controller mode. It provides accurate and stable control of the three controller mode. It is recommended in system where the load changes frequently. The Three-term , PID controllers are probably the most widely used industrial controller. An Even complex industrial control systems may comprises a control network whose main control building block is a PID control module. The three-term PID controller has had a long history of use and has survived the changes of technology from the analogue era in to the digital computer control system age quite satisfactorily. It was the first controller to be mass produced for the high-range volume market that existed in the process industries.

In the spring of 1985, while helping the son of an acquaintance prepare for a high school examination in Greek geometry, I experienced an overwhelming personal and compelling insight into the nature of the constant now called pi. From... more

In the spring of 1985, while helping the son of an acquaintance prepare for a high school examination in Greek geometry, I experienced an overwhelming personal and compelling insight into the nature of the constant now called pi. From two very careful experimental tests of my hypothesis, I found that the ratio cited universally as the definitive numerical value of pi, does not accurately quantify the circumference of a circle, but that pi is measurably greater than 3.14159…. Over months of personal research, I gradually focused my studies upon the nature of circular motion as described by the great Galileo Galilei, and I eventually developed a logical and mathematical argument by which I decomposed circular motion into two simultaneous rectilinear component movements, whose separate magnitudes, and whose compounded magnitude, could be determined exactly by means of Greek geometry.

The objective of this work is to utilize the effectiveness of Rice Husk Ash (RHA) material to enhance the properties of natural soil used for subgrade material in pavement. The quality of a flexible pavement depends on the strength of its... more

The objective of this work is to utilize the effectiveness of Rice Husk Ash (RHA) material to enhance the properties of natural soil used for subgrade material in pavement. The quality of a flexible pavement depends on the strength of its sub-grade soil. In view of the above the present investigation has been carried out with rice husk ash mixed individually and also in combination with locally available natural soil in different proportions stepped concentration of 5%, 10%, 15%, 20%, 25% and 30% by dry weight of the soil individually are used to stabilized of Natural Soil (CL) and to evaluate its properties like Grain Size Distribution, LL, PL, PI, OMC, MDD, CBR and Swelling Pressure. The test results indicate that the addition of RHA enhances the percentage of grain size distribution, but with addition of RHA till 10% the LL, PL, PI and swelling pressure decreases, while these parameters further increases in this limit beyond i.e. 10% to 30% of RHA while enhancement is observed above 20% to 30%, Specific Gravity and Maximum Dry Density (MDD) decrease with addition of RHA, for all percentage values, whereas OMC increases in each material. The CBR value increases with the addition of RHA till 10%, while it decreases beyond the limit 10% to 30% with addition of RHA.

The aim of this study is to design a control strategy for the angular rate (speed) of a DC motor by varying the terminal voltage. This paper describes various designs for the control of direct current (DC) motors. We derive a transfer... more

The aim of this study is to design a control strategy for the angular rate (speed) of a DC motor by varying the terminal voltage. This paper describes various designs for the control of direct current (DC) motors. We derive a transfer function for the system and connect it to a controller as feedback, taking the applied voltage as the system input and the angular velocity as the output. Different strategies combining proportional, integral, and derivative controllers along with phase lag compensators and lead integral compensators are investigated alongside the linear quadratic regulator. For each controller transfer function, the step response, root locus, and bode plot are analysed to ascertain the behaviour of the system, and the results are compared to identify the optimal strategy. It is found that the linear quadratic controller provides the best overall performance in terms of steady-state error, response time, and system stability. The purpose of the study that took place was to design the most appropriate controller for the steadiness of DC motors. Throughout this study, analytical means like tuning methods, loop control, and stability criteria were adopted. The reason for this was to suffice the preconditions and obligations. Furthermore, for the sake of verifying the legitimacy of the controller results, modelling by MATLAB and Simulink was practiced on every controller.