The dynamic model of a force control system depends not only on the actuator but also on the manipulated object. Generally the object dynamics are unknown and frequently change, and it therefore is difficult to identify the actual dynamics of the system. Designing a nonadaptive controller to perform well under unknown and variant conditions is not feasible. To enhance the controller performance...

In this paper, finding the maximum load carrying capacity of mobile manipulators for a given two-end-point task is formulated as an optimal control problem. The solution methods of this problem are broadly classified as indirect and direct. This work is based on the indirect solution which solves the optimization problem explicitly. In fixedbase manipulators, the maximum allowable load is limit...

We consider nonlinear nonconvex evolution inclusions driven by time-varying subdifferentials 0(t,x) without assuming that (t,.) is of compact type. We show the existence of extremal solutions and then we prove a strong relaxation theorem. Moreover,r we show that under a Lipschitz condition on the orientor field, the solution set of the nonconvex problem is path-connected in C(T,H). These result...

In this paper, a novel path tracking control method is proposed for a nonholonomic mobile robot. The proposed controller is based on a bang-bang control technique, the concept of landing curve, and a biologically inspired neural dynamics model that is derived from Hodgkin and Huxley’s (1952) membrane equation. The acceleration constraints and the nonholonomic kinematics constraints are full res...

We consider a general class of mathematical models P for cancer chemotherapy described as optimal control problems over a fixed horizon with dynamics given by a bilinear system and an objective which is linear in the control. Several twoand three-compartment models considered earlier fall into this class. While a killing agent which is active during cell division constitutes the only control co...

In this paper, we study optimal control problems associated with a scalar hyperbolic conservation law modeling the development of ovarian follicles. Changes in the age and maturity of follicular cells are described by a 2D conservation law, where the control terms act on the velocities. The control problem consists in optimizing the follicular cell resources so that the follicular maturity reac...

The paper presents a scheme for obtaining a linear-feedback law for a linear system as a result of minimizing a quadratic-performance index; the resulting closed-loop system has the property that all its poles lie in a halfplane Re (s) < -a, where a >0 may be chosen by the designer. The advantages of this arrangement over conventional optimal design are considered. In particular, it is shown th...

A kind of wireless video transmission intelligence surveillance system is developed to perform work normally done by human being in hazardous environment, narrow space, as well as chemical and toxic places. This system consists of two main parts: a host computer with monitoring software and a mobile intelligent vehicle. The host computer software can provide real-time display of video, temperat...

&lt;p style='text-indent:20px;'&gt;In this paper, we propose a time-delayed HIV/AIDS-PrEP model which takes into account the delay on pre-exposure prophylaxis (PrEP) distribution and adherence by uninfected persons that are in high risk of HIV infection, analyze impact number individuals with infection. We prove existence stability two equilibrium points, for any positive time delay. After, an ...

We address the question of optimization of the microalgal biomass long term productivity in the framework of production in photobioreactors under the influence of day/night cycles. For that, we propose a simple bioreactor model accounting for light attenuation in the reactor due to biomass density and obtain the control law that optimizes productivity over a single day through the application o...