Nonlinear PID design is difficult if one approaches the problem from a global design perspective. In this paper, we propose coalescing the adaptive local linear modeling approach with traditional linear PID controller design techniques to arrive at a principled, intuitive, and simple nonlinear PID controller design methodology. The paper, in particular, discusses two local linear modeling appro...

With the advent of computer control, supervisory controllers such as simple cascade control, model predictive control (MPC), dynamic matrix control (DMC), etc are increasingly being used in process industries. In this study, performance of three such controllers namely simple cascade controller, ‘MPC cascaded to PID’ and ‘PID free MPC’ are compared on a continuous stirred tank heater (CSTH) sys...

OBJECTIVE Effectiveness differences between outpatient pelvic inflammatory disease (PID) treatment regimens are uncertain, but significant differences in cost exist. GOAL To examine the influence of antibiotic costs on PID therapy cost-effectiveness. STUDY DESIGN The authors used a Markov decision model to estimate the cost-effectiveness of recommended antibiotic regimens for PID and perfor...

Primary immunodeficiencies (PID) are inherited disorders of immune system function [1,2] characterised by absent or low response to infectious agents and a high prevalence of autoimmune manifestations and lymphoproliferative diseases. More than 120 PID in which a molecular defect causes the disease have been identified. The IUIS/WHO Experts Committee published a classification of all PID known ...

In this paper, an MIMO boiler control problem of Benchmark PID 2012 is studied, and a multi-loop PID control system is designed by our data-driven loop-shaping method. Our method is applicable to non-minimum phase or time-delay SISO plants very easily especially for stable plants, and a good disturbance rejection can be attained with a specified stability margin. The boiler model has non-minimu...

Stability is a crucial issue to consider for control system design. In this paper a new multi-objective approach to approximate the stabilizing region for linear control systems is proposed. The design method comprises two stages. In the first stage, a bi-objective sub-problem is solved: the algorithm aims to calculate the vertices that maximize both the volume of the decision space and the per...

Chlamydia trachomatis infection, the most common reportable disease in the United States, can lead to pelvic inflammatory disease (PID), infertility, ectopic pregnancy, and chronic pelvic pain. Although C. trachomatis is identified among many women who receive a diagnosis of PID, the incidence and timing of PID and long-term sequelae from an untreated chlamydial infection have not been fully de...

A PID-deadtime controller is realized by inserting a time delay into the integral feedback circuit. Such a controller possesses a transfer function similar to a Smith predictor or an internal-model controller. Effective tuning of PID deadtime controllers remains unsolved even though they give better regulatory performance than a conventional PID control algorithm for processes with a long pure ...

OBJECTIVES The presence and severity of pelvic inflammatory disease (PID) symptoms are thought to vary by microbiological etiology but there is limited empirical evidence. We sought to estimate and compare the rates of hospitalisation for PID temporally related to diagnoses of gonorrhoea and chlamydia. METHODS All women, aged 15-45 years in the Australian state of New South Wales (NSW), with ...

The filter term of a PID with Filter controller reduces the impact of measurement noise on the derivative action of the controller. This impact is quantified by the controller output travel defined as the total movement of the controller output per unit time. Decreasing controller output travel is important to reduce wear in the final control element. Internal Model Control (IMC) tuning correla...