PID controllers are the most popular group of controllers in practical applications. Many theoretical techniques and procedures have been developed for PID controllers with the aim to optimize the function of the control circuits. However, these techniques are seldom applied, except in cases where there are some extreme requirements for the safety and the operational quality of the control loop...

There are two main components in the sender-side implementation of TCP Autotuning socket buffers [SMM98]. The first component determines what socket buffer size a connection desires based on its congestion window, which reflects this connection's round trip time and its share of the available bandwidth. The second component is the algorithm that is used to determine a connection's fair share of...

This paper describes a self-tuning Neuro-fuzzy Controller by Genetic Algorithm (NFCGA) applied to a coupled-tank fluid level control. The controller use a simplified fuzzy algorithm which based on the Radial Basis Function neural network (RBF). Genetic Algorithm (GA) is used to tune simultaneously all the parameters of controller from a random state. A plant model is used initially to tune the ...

Natural systems maintain steady internal, physical, and chemical conditions (i.e. they exhibit homeostasis) keep control over their local environment by creating many mini-homeostatic modules. In comparison, synthetic materials are typically formed under equilibrium or kinetically trapped do not usually change properties with time. Hence, devoid of self-regulation, self-correction self-monitori...

control of well drilling operations poses a challenging issue to be tackled. the loss of well control could lead to the occurrence of blowout as a severe threat, involving the risk of human lives and environmental and economic consequences. conventional proportional-integral (pi) controller is a common practice in the well control operation. the small existing margin between pore pressure and f...

objective: this study aimed to investigate the prediction of asthma control on the basis of perceived stress, locus of control, and self-efficacy in adult patients with asthma.  methods: this was a descriptive-correlative and cross-sectional study.the solecty of this study is all asthmatic patients in tehran. our sample consisted of 100 participants who were selected by purposeful sampling meth...

Performance assessment and monitoring of control systems can be used to improve the performance of industrial processes. In this paper, a novel relay feedback based method for monitoring and automatic retuning of a class of proportional-integral (PI) controllers is proposed for the systems with gain nonlinearity. For performance assessment of the closed loop system, a time domain evaluation cri...

Self-tuning optical systems are of growing importance in technological applications such as mode-locked fiber lasers. Such self-tuning paradigms require intelligent algorithms capable of inferring approximate models of the underlying physics and discovering appropriate control laws in order to maintain robust performance for a given objective. In this work, we demonstrate the first integration ...

Suspension system plays an imperative role in retaining the continuous road wheel contact for better road holding. In this paper, fuzzy self-tuning of PID controller is designed to control of active suspension system for quarter car model. A fuzzy self-tuning is used to develop the optimal control gain for PID controller (proportional, integral, and derivative gains) to minimize suspension work...