Tag Archives | Instrumentation

Modified-Smith-Predictor-Based-Cascade-Control

Modified Smith Predictor-Based Cascade Control of Unstable Time Delay Processes

  Abstract: An improved cascade control structure with a modified Smith predictor is proposed for controlling open-loop unstable time delay processes. The proposed structure has three controllers of which one is meant for servo response and the other two are for regulatory responses. An analytical design method is derived for the two disturbance rejection controllers by […]

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Simulation-Stability-Analysis-Neural-Network-Based-Control

Simulation and Stability Analysis of Neural Network Based Control Scheme for Switched Linear Systems

Abstract: This paper proposes a new adaptive neural network based control scheme for switched linear systems with parametric uncertainty and external disturbance. A key feature of this scheme is that the prior information of the possible upper bound of the uncertainty is not required. A feedforward neural network is employed to learn this upper bound. The […]

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FIRST-ISA-Automation-Federation-STEM

Shaping the Future of Our Profession and Association

In a few days, an event will take place in two American cities that will play an important role in encouraging high school students to pursue careers in engineering and automation. The 2017 FIRST® Championship – an annual celebration of young people’s passion for science, technology, engineering, and mathematics (STEM) – will take place 19-22 […]

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DC-Servomechanism-Parameter-Identification-Closed-Loop-Approach

DC Servomechanism Parameter Identification: Closed-Loop Approach

  Abstract: This paper presents a Closed Loop Input Error (CLIE) approach for on-line parametric estimation of a continuous-time model of a DC servomechanism functioning in closed loop. A standard Proportional Derivative (PD) position controller stabilizes the loop without requiring knowledge on the servomechanism parameters. The analysis of the identification algorithm takes into account the control […]

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time-for-change

ISA Needs to Change, but How?

As you’ll recall, I stated in my February post that ISA’s long-term value and success depend on our ability to embrace change and become:  more flexible, more adaptable, faster to market, and less reactive. So how do we move ahead and work to achieve these change goals? First of all, driving organizational changes begins at […]

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Robust-SDRE-Filter-Design-for-Nonlinear-Uncertain-Systems

Robust SDRE Filter Design for Nonlinear Uncertain Systems

Abstract: In order to remedy the effects of modeling uncertainty, measurement noise and input disturbance on the performance of the standard state-dependent Riccati equation (SDRE) filter, a new robust H∞ SDRE filter design is developed in this paper. Based on the infinity-norm minimization criterion, the proposed filter effectively estimates the states of nonlinear uncertain system exposed […]

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