Sensors, Actuators
AS-i bus cuts cycle time in half for cleaning equipment manufacturer
BUS OF THE MONTH: AS-i Bus
Control Valves: Sizing, Design, Characteristics
C ontrol valves are devices with movable, variable, and controlled internal elements for modulating fluid flow in a conduit. The valve restricts flow in response to the command signal from a process measurement control system. Basically, a control valve consists of a pressure containment enclosure body and various internal elements–fixed and movable–commonly called the valve trim. While there are uncommon exceptions, control valves are designed to function in either a push-pull or linear sliding-stem manner, or in a rotary-stem manner.
PCs, Flowcharts, and SDS Speed Production at Silicon Graphics
Smart Distributed System
Multivariable Controllers Balance Performance with Cost
Controllers that juggle multiple process variables are neither simple nor common, but they can handle some of the most complex control problems.
Sampled Control, Better Results With Less Data
Control Engineering classic: In this article, the consequences of performing feedback control with sampled rather than continuous data are examined.
Control Engineering Highlights the 40 Best Products of 2000
Control Engineering editors— in the 14th annual process—highlighted the best products of the year, based on technological advancement, impact on the market, and service to industry.Editors selected from among thousands of products mentioned in Control Engineering and Control Engineering Online during year 2000, in nine product categories: Control components; Human-machine interface...
Model, Simulate, Execute Simulation in Discrete Control
KEY WORDS PC-based control Machine control Software for control Flowchart programming Simulation Imagine a product design, completed in software, and rendered in 3-D graphics. This rendering allows designers to strip away layers to view and work on components underneath. Next, manufacturing engineers can design the machines, fixtures, and processes required to produce components and completed ...
Smart two-way diaphragm valves
Irvine, Calif. —Two-way diaphragm valves from Burkert are available with intelligent On/Off , continuous proportional, or manual control. Available in either plastic or stainless steel, Types 2030/2031 are designed for automated process control and Types 3232/3233 for manual control applications requiring two-way flow control of ultra-pure, sterile, aggressive, or abrasive gases, slurrie...
Pressure Sensing: It’s Everywhere!
KEY WORDS Process control and instrumentation Process sensing Pressure sensing One of the most-used sensors, pressure instrumentation is found nearly everywhere now. The old process standby is still there—chemical change-of-state monitoring still requires tracking such mundane variables as pressure and temperature—but it now can be found, however tiny, in manufactured goods from au...
