This paper proposes a simple approach to design a PID controller for an uncertain SISO system that will guarantee closed loop stability when the input is varied between 0 and 60 % of its working range. The Robust Controller design method used here is based on Small Gain theorem. A family of transfer functions corresponding to different working ranges is used to describe the uncertain plant for ...

in this paper, we introduce λκ−closed sets and study its properties in generalized topological spaces.

This paper presents a new sensor arrangement and feedback controller for hysteresis, creep and vibration in piezoelectric actuators. A force and strain sensor is combined to provide both extremely low noise and high stability. The proposed technique is demonstrated on a nanopositioning platform with a range of 10 μm and a resonance frequency of 2.4 kHz. In closed-loop, the controller damps the ...

We consider the problem of stabilizing uncertain systems with quantization. The plant uncertainty is dealt with by the supervisory adaptive control framework, which employs switching among a finite family of candidate controllers. For a static quantizer, we quantify a relationship between the quantization range and the quantization error bound that guarantees closed loop stability. For a dynami...

Enclosed weapon bays on modern aircraft interfere with prelaunch, Flight Termination System verification during training test launches. Range safety personnel need to verify the functionality of the flight termination system prior to missile launch. The missile telemetry RF is highly attenuated when the aircraft missile bay doors are closed, limiting the range for which the aircraft can fly dur...

OBJECTIVE To assess the possibility of improving nocturnal glycemic control as well as meal glycemic response using closed-loop therapy in children aged <7 years. RESEARCH DESIGN AND METHODS This was a randomized controlled crossover trial comparing closed-loop with standard open-loop insulin pump therapy performed in an inpatient clinical research center. Ten subjects aged <7 years with type...

This paper presents improved empirical representations of a general class of open-loop unstable systems using closed-loop system identification. A multi-axis magnetic-levitation (maglev) nanopositioning system with an extended translational travel range is used as a test model to verify the closed-loop system-identification method presented in this paper. A closed-loop identification technique ...

Abstract Four types of magnets were used in this study: neodymium NdFeB (grade N35 and N52), ferrite (Y10), samarium-cobalt SmCo (XG30 2:17). They chosen to represent a wide range volumes from 0.035 19 cm 3 (540 times), radius R 1.5 12.5 mm (8 ×), length L 0.5 40 (80 aspect ratio L/R 0.051 17 (330 contact forces 0.2 250 N (over 1000 ×). The study shows that previously reported closed-form equat...