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How to Change Thinking Patterns to Generate New Ideas

Are you stretching your thinking beyond the obvious to find new solutions? We have a tendency to use the first workable idea when trying to make something work, fix a problem, or make an improvement. This has been described as “satisficing,” where we try alternatives until an acceptable solution is found and then stop looking […]

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Achieving Tight Control of Single Phase Liquid Reactors

Well-mixed liquid reactors have dynamics that offer the possibility of extremely tight control of product composition but lack some of the self-regulation in multiple phase reactors achieved by inventory control. For a reactor to achieve its full potential requires an intelligent design of the control strategy. Here we look at how to set up the […]

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ISA Training and Education Programs for March

There’s still time to sign up for ISA’s training and education program in March.  Following is a listing of automation and control class offerings, plus exam preparation and online webinars. Onsite Training In addition to taking ISA classroom training at ISA headquarters, regional locations and industry events, you can also receive customized ISA training at […]

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The Internet of Everything Delivers Smart Manufacturing

The Internet of Everything (IoE) is here now. Today it is estimated that manufacturers generate 2 exabytes of information daily—resulting in more “big data” than any other industry or sector. And when you consider that only 4 percent of the devices on the manufacturing floor are actually connected to a network, we can expect to […]

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Multivariable Control Performance: A Case for Model-less Control

Multivariable control is usually thought of as a product of the computer age, but multivariable control has always been an integral part of industrial process operation. Before the computer era, the operating team did multivariable control manually, by adjusting the available controllers and valves to keep related process variables within constraint limits and to improve […]

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Piecewise Controller Design for Affine Fuzzy Systems

Abstract: This paper studies the problem of state feedback controller design for a class of nonlinear systems, which are described by continuous-time affine fuzzy systems. A convex piecewise affine controller design method is proposed based on a new dilated linear matrix inequality (LMI) characterization, where the system matrix is separated from Lyapunov matrix such that the […]

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PD Plus Error-Dependent Integral Nonlinear Controllers for Robot Manipulators

Abstract: In framework of traditional PID controllers, there are only three parameters available to tune, as a result, performance of the resulting system is always limited. As for Cartesian regulation of robot manipulators with uncertain Jacobian matrix, a scheme of PID controllers with error-dependent integral action is proposed. Compare with traditional PID controllers, the error-dependent […]

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