This work deals with the control of the human immune system. A standard immune system model is modified by introducing control signals corresponding to drug cocktail and immune suppressor treatments. The ultimate objective is to use these control signals to ‘cure’ a chronically-ill patient. Control is challenging for this system due to nonlinearities and time delays. In fact, it is shown that f...

A constant voltage regulator, to supply constant power loads, is realized using a Switched-capacitor converter. Exhaustive studies have been carried out to find the suitability of available control schemes and finally one control scheme investigated with (i) operation of the converter at different crossover frequencies (ii) operation of the converter at different phase Margins. Various operatin...

This paper derives a family of digital non-linear waveform generators fundamental to the developement of an adaptive mixed-signal IC controller for power-factor-correction (PFC) of high-frequency switching AC-to-DC converters with the objective of significanlty lowering the cost of rectifier design. The controller application is described along with combined controller and power stage simulatio...

In this paper are presented the analysis of three-phase boost rectifier converters in close loop using PI classical controller and PI fuzzy controller. A multi-loop controller for the three-phase boost rectifier consists of an outer loop to regulate the output voltage and two inner current loops one each for the d and q axis input currents. The current loops control the decoupled channels of th...

This chapter presents the design of a controller that ensures both the robust stability and robust performance of a physical plant using a linearized identified model . The structure of the plant and the statistics of the noise and disturbances affecting the plant are assumed to be unknown. As the design of the robust controller relies on the availability of a plant model, the mathematical mode...

This paper presents a novel decoupled two degrees of freedom (2-DOF) translational parallel micro-positioning stage. The stage consists of a monolithic compliant mechanism driven by two piezoelectric actuators. The end-effector of the stage is connected to the base by four independent kinematic limbs. Two types of compound flexure module are serially connected to provide 2-DOF for each limb. Th...

This paper describes an algorithm to control a two stage hydraulic servovalve designed for aerospace applications. The valve has a piezoelectric ring bender actuating a first stage spool with a significant amount of overlap to reduce internal leakage. The piezoelectric ring bender is a less complex and lighter alternative to a conventional torque motor. The second stage has electrical instead o...

Sliding mode controller (SMC) has become a popular traditional control method in industries due to the most effective strategies employing nonlinear and ability reject disturbances, particularly for line trajectory control. However, this chattering problems high-frequency switching. To cope with shortcoming, an artificial intelligence (AI) is utilized SMC eliminate or reduce problem. This paper...