a r t i c l e i n f o Keywords: Marine snow Aggregates Biogeochemistry Density gradients Density interfaces Fluid dynamics Marine snow aggregates are often a dominant component of carbon flux and are sites of high bacterial activity; thus, small-scale changes in the settling behavior of marine snow can affect the vertical locations of carbon export and remineralization in the surface ocean. In ...

In this paper, we present a design procedure of composite nonlinear feedback control for general multivariable systems with actuator saturation. We consider both the state feedback case and the measurement feedback case without imposing any restrictive assumption on the given systems. The composite nonlinear feedback control consists of a linear feedback law and a nonlinear feedback law without...

This paper presents comparison among methods of determination of the characteristic polynomial coefficients. First, the resultant systems from the methods are compared based on frequency criteria such as the closed loop bandwidth, gain and phase margins. Then the step responses of the resultant systems are compared on the basis of the transient behavior criteria including overshoot, rise time, ...

The paper presents a new method for obtaining fast response to set point changes by using a nonlinear feedforward which is obtained by solving a nonlinear equation. Pulse-step control is simple and gives a settling time close to the time where the impulse response reaches its maximum. The fact that the response time is matched to the process dynamics makes the method more robust than time-optim...

This paper proposed control strategies for the modern mechatronic Continuously Variable Transmission (CVT) System using three different techniques; The Ziegler-Nichols, Linear Quadratic and Pole-Placement methods. The results of the system responses of the designed control schemes were successfully simulated using MATLAB. Comparing the results showed that controller implemented using the Pole-P...

Proportional Integral Derivative (PID) Controller is a primary component in industrial control systems nowadays. Its gain parameters have a powerful effect on its transient response criteria such as integral squared error (ISE), settling time, rise time and overshooting. Tuning gain parameters of PID to reach the optimal transient response of control systems is a hard problem. The standard meth...

A novel homogeneity approach to obtain an upper bound on the settling time for a robust second order sliding mode controller is presented. The stability analysis is substantiated by a global non-smooth Lyapunov function. The proposed method is applied to the ‘twisting’ controller and is based on a combination of global exponential stability and global finite time stability of switched systems. ...

Variable structures with sliding mode control (SCM) are one of the best techniques for analyzing the dynamics of nonlinear systems, not only in continuous domain but also in discrete domain. This paper presents a redefined discrete quasi-sliding mode control strategy. The reaching law condition defined in the presently available technique is redefined in this paper. For systems with both time i...

Closed form solutions for the 50% delay, rise time, overshoot characteristics, and settling time of signals in an RLC tree are presented. These solutions have the same accuracy characteristics as the Elmore delay for RC trees and preserves the simplicity and recursive characteristics of the Elmore delay. The solutions introduced here cover all damping conditions of an RLC circuit including the ...