BACKGROUND Hypertension is one of the recognized risk factors of cardiovascular diseases in adult diabetic patients. High prevalence of suboptimal blood pressure (BP) control has been well documented in the majority of studies assessing BP control in diabetic patients in sub-Saharan Africa. In Uganda, there is a dearth of similar studies. This study evaluated the prevalence and correlates of su...

In this paper, a complete solution on the suboptimal feedback control law synthesis for underactuated systems, based on the general optimization framework of the Dynamic Programming Theory is introduced. Control method proposed keeps the general structure of a suboptimal control approach, while the functional defining performance index is based on the underactuated system energy. Some numerical...

This paper presents the central finite-dimensional H∞ regulator for nonlinear polynomial systems, that is suboptimal for a given threshold γ with respect to a modified BolzaMeyer quadratic criterion including the attenuation control term with the opposite sign. In contrast to the previously obtained results, the paper reduces the original H∞ control problem to the corresponding optimal H2 contr...

In this paper singular H 1 suboptimal control for a class of two-block interconnected nonlinear systems is addressed. Under the assumption that the regular H 1 suboptimal control problem is solvable for one of the blocks, an auxiliary nonlinear system is deened. Then it is shown that a feedback solution to the singular H 1 suboptimal control problem for the auxiliary system also applies to the ...

Background: The link between glycaemic control of type 1 diabetes and family functioning is complex, with the existing literature largely focussing upon the association between clear patterns of disturbances in family functioning and suboptimal diabetic control. The more subtle changes to family function that might influence the degree of successful management of a child’s diabetes have been le...

A suboptimal active disturbance rejection controller (S-ADRC) is proposed for second-order systems with unknown time-varying nonlinear dynamics. The output-feedback guarantees a global convergence to the vicinity of an optimal solution by means dynamic control gains, based on estimated main and extended state variables obtained through high-gain observer. Three numerical examples compare perfor...