Fed-Batch Process for Chili

What are the Inherent Differences in the Performance of Pure Batch, Fed-Batch and Continuous Reactors?

In pure batch operations, changes in feed conditions, disturbances, or demand show up as changes in the profile of key process variables. For a bioreactor, variability in the seed culture, indeterminacy of cell response and changes in the demand for air, substrate (e.g. glucose), and reagent cause the variation in the batch profile for dissolved […]

Print Friendly
Continue Reading · 0
CNC punching machine with metal sheet

A Fast Converging Robust Controller Using Adaptive Second Order Sliding Mode

Abstract: This paper proposes an adaptive second order sliding mode (SOSM) controller with a nonlinear sliding surface. The nonlinear sliding surface consists of a gain matrix having a variable damping ratio. Initially the sliding surface uses a low value of damping ratio to get a quick system response. As the closed loop system approaches the desired […]

Print Friendly
Continue Reading · 0
Maintenance engineer

ISA Training and Education Programs for February

February training and education from ISA feature special programs including the Integrator Version of the Automation Engineering Survival Training course and the Process Automation Boot Camp. ISA’s Automation Engineering Survival Training course is designed for system integrators and focuses on concepts important to automation engineers and others involved in a project design and commissioning role. […]

Print Friendly
Continue Reading · 0
Knowledge is power

Leverage New Knowledge to Avoid Being Blindsided

The idea that knowledge is power, coupled with the massive amount of information available to all of us today, should mean everyone should be powerful. Never before in human history has so much information been available. Movable type and the printing press in 15th-century Europe is generally considered the first “information revolution,” followed by the […]

Print Friendly
Continue Reading · 0
Tank equipment

An Overview of the Control Loops for Batch, Fed-Batch and Continuous Reactors

Nearly all reactors have temperature and pressure control since these affect reaction rate. Concentration control is desirable but depends upon the feasibility, accuracy, and reliability of analyzers and inferential measurements. For at-line analyzers, there is the additional consideration of the dead time added to the loop. To date offline analyzers have only been used to […]

Print Friendly
Continue Reading · 0
Jet engine turbine (3D xray blue transparent)

Static Feedback Stabilization of Nonlinear Systems

Abstract: This paper considers a single sensor and single actuator approach to the static feedback stabilization of nonlinear systems. This is essentially a remote control problem that is present in many engineering applications. The proposed method solves this problem that is less expensive to implement and more reliable in practice. Significant results are obtained on […]

Print Friendly
Continue Reading · 0
Abstract illustration of business network grid

Creating Working Information Capital Within Your Enterprise

Conversations in recent months with manufacturing professionals across a range of industries highlight a common challenge and opportunity. The most competitive professionals are looking for seamless and secure working information capital—not simply more data—to drive better decision making, expose process inefficiencies, facilitate best-practice collaboration, and uncover new business opportunities. At Rockwell Automation, we can relate. […]

Print Friendly
Continue Reading · 0
Communication towers.

Wireless Process Instrumentation: An End-User’s Perspective

Wireless technology adoption in many industrial sectors, including process automation, has been growing during the past decade. Industry consortiums, standards organizations, vendors, and end users have been pursuing the technology with varying degrees of interest. We explored wireless solutions for suitability with the potential to bridge gaps in process automation, especially in asset management, remote […]

Print Friendly
Continue Reading · 0
Packaging machine in brewery

Bi-Objective Redundancy Allocation Problem

Abstract: Traditionally, in the redundancy allocation problem (RAP), two general classes of optimization problems are considered; reliability optimization and availability optimization. Contrary to reliability optimization, fewer researchers have studied availability optimization to find out the optimal combination of components type and redundancy levels for each subsystem in a system for maximizing (or minimizing) the objectives. […]

Print Friendly
Continue Reading · 0
Teamwork Collaboration People Diversity Concept

Leveraging Industry Silos to Develop New Business Opportunities

There has been a great deal of discussion about isolated silos in industry creating barriers to growth, but they also offer opportunities for those willing to take the initiative. The term silo thinking is used in business to describe the mindset when departments do not share information and collaborate with others in the same company. […]

Print Friendly
Continue Reading · 0