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Topic: Control experiment

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Experiment

Experiment

	Experiment - Wikipedia, the free encyclopedia
		A controlled experiment generally compares the results obtained from an experimental sample against a control sample, which is practically identical to the experimental sample except for the one aspect whose effect is being tested.
		In many laboratory experiments it is good practice to have several replicate samples for the test being performed and have both a positive control and a negative control.
		The negative control demonstrates the base-line result obtained when a test does not produce a measurable positive result; often the value of the negative control is treated as a "background" value to be subtracted from the test sample results.
	en.wikipedia.org /wiki/Experiment (2106 words)

	Experimental control - Wikipedia, the free encyclopedia
		Experimental controls are used in scientific experiments to prevent factors other than those being studied from affecting the outcome.
		In this example, and in medical trials generally, the experimental control comes in the form of a control group, a group that is observed under ordinary conditions while another group is subjected to the treatment (or other factor) being studied.
		In other cases, an experimental control is used to prevent the effects of one variable from being drowned out by the known, greater effects of other variables.
	en.wikipedia.org /wiki/Control_experiment (387 words)

	Control article - Control Control experiment variable Control theory engineering Control - What-Means.com (Site not responding. Last check: 2007-10-09)
		A Control experiment is an experiment where the variable that is being investigated is kept constant.
		Control (album) is a 1986 album by Janet Jackson
		Control (novel) is a 1982 novel by William Goldman
	www.what-means.com /encyclopedia/Control (121 words)

	Automatic Control Telelab - Remote Experiments
		Control of the angle of a DC motor.
		Control of the speed of a DC motor.
		Control of the water level in a tank.
	www.dii.unisi.it /~control/act/experiments.php (24 words)

	MIDDECK ACTIVE CONTROL EXPERIMENT (MACE)
		Since the success of such flexible control is intimately dependent upon the accuracy of the spacecraft model used for control design, MACE is essentially a spacecraft modeling validation effort where success is determined by the control performance and predictability that is achieved in earth orbit.
		Controllers are also designed based on the measurement models and, by comparing the performance obtained with that achieved using the finite element based controllers, the designer can understand the cost-benefit of further FEM refinement (Step D).
		The performance achieved by controlling the flexibility in the system is compared to standard industry practice where instrument pointing servo control is closed with a bandwidth roughly equal to one tenth of the frequency of the first flexible mode.
	www.mit.edu /people/jhow/mace.html (2268 words)

	Online Dictionary for French English, Spanish English, Italian English, and more. (Site not responding. Last check: 2007-10-09)
		A mechanism that controls the operation of a machine; "the speed control on his turntable was not working properly"; "I turned the controls over to her"; SYN: controller.
		To verify or regulate by conducting a parallel experiment or comparing with another standard, of scientific experiments: "Are you controlling for the temperature?"; SYN: verify.
		An attempt to control conception by refraining from intercourse during the period when ovulation is most likely to occur; SYN: rhythm method, rhythm, calendar method of birth control, calendar method.
	www.ultralingua.net /?service=ee&text=control (813 words)

	BeeSource.com \| POV \| USDA \| Beekeeping Issues Alternative Varroa Control Experiment
		This is particularly relevant in light of failures of the currently registered compounds to control varroa that have developed resistance to these compounds.
		The food grade mineral oil was applied using an atomizer, the coumaphos was applied as a strip in the brood nest and the control was untreated.
		As I have stated elsewhere, the idea of combining multiple tactics for varroa control is one of the best long-term strategies for pesticide use reduction, minimization of resistance, and environmental safety (to bees and humans).
	www.beesource.com /pov/usda/abjsep2003.htm (698 words)

	Experiment Controller Preface
		In this type of system, experiment control is relegated to an inexpensive machine while a computer with many resources provides for general services such as word processing, laboratory information management, and analysis.
		Many computer-based experiment control systems are arrived at with what appears to be the most inescapable of deductive logic but yet don't catch on.
		The current Experiment Controller is less complex, is solder masked to virtually eliminate "solder splashes," and is silk screened with the parts placement.
	www.jsu.edu /depart/psychology/sebac/Preface.html (3523 words)

	Level Control Experiment (Site not responding. Last check: 2007-10-09)
		In response to this, the valve position increasingly oscillates and would tend towards on-off control when the valve oscillates between the fully open and fully closed position.
		At low proportional bands, the process was prone to oscillate before returning to a steady state and this oscillation in process variable tended to be away (offset) from the setpoint.
		A proportional band of 100 indicates that the control valve will move over 100% of its range for a 100% measurement sensing range.
	www.chemeng.ed.ac.uk /~igds/Control/lab/level/answers3.html (218 words)

	An inxpensive experiment control interface for IBM PCs
		Its prototypical niche is the control of inputs and outputs for an operant experimental chamber ("Skinner box").
		Our implementation strategy for the experiment control system was based on the notion of a network of "smart" apparatuses, rather than a complex interface that enables a single computer to control events in multiple experimental stations.
		In this network arrangement, experiment control programs are transferred from a general-purpose computer to the experimental stations, and data are returned to the "supervisory" computer across the serial line.
	www.jsu.edu /depart/psychology/sebac/fac-sch/p-w-c/p-w-c.html (1105 words)

	Experiment (Site not responding. Last check: 2007-10-09)
		The purpose of this experiment is to demonstrate active noise control.
		In the real world, the implementation of active noise control is much more complex due to phase and spatial matching, efficient transducers, system identification, etc., as explained in the paper "Active Control of Sound and Vibration," by C.
		By activating the control (pushing on the control button in the program), sound wave of equal amplitude and opposite phase is sent to the left speaker to cancel the noise.
	www.val.me.vt.edu /Experiment/experiments.html (451 words)

	:: NASA Quest > Archives :: (Site not responding. Last check: 2007-10-09)
		This activity is designed to allow students to explore the basic control surfaces of the orbiter and the motions they affect by having the students perform a hands-on experiment that will demonstrate the orbiter's movement during flight.
		It is primarily a hands-on experiment complemented by a student informational reading, comprehension worksheet, experiment guidesheet and a series of photos displaying the experiment's set-up.
		Students will construct pre-fabricated space shuttle orbiters with movable control surfaces that will be used to demonstrate the motions of roll, pitch and yaw.
	quest.arc.nasa.gov /space/frontiers/activities/aeronautics/control.html (272 words)

	[No title]
		The existence of a long control integration (greater than several hundred years) with minimal drift is an important pre-condition for the successful design and interpretation of climate variability and change experiments.
		The output from a long, stable control experiment such as ctrl_06 provides a database for assessing the possible range of internal variability in a model, and hence the significance of the model's response to external forcing.
		The three GFDL R30 coupled model experiments named gps_01, gps_02 and gps_03 were all forced by the same IS92a-like forcing scenario, but differ in that they were initialized from different points in the long-running ctrl_06 experiment.
	www.gfdl.noaa.gov /~kd/ClimateDynamics/NOMADS/DecCenDoc3.html (997 words)

	Position control experiment - module 2
		This second module is a progressive experiment which starts from the very simplest interface for computer control of a motor, investigates velocity feedback and progresses to a bidirectional drive circuit.
		When you use the equipment of the position control experiment, however, the potentiometer to use is already mounted at the other end of the apparatus from the motors.
		Control will be a bit more 'wobbly', overshoots will be harder to avoid and the control may have to be softer.
	www.usq.edu.au /course/material/ENG3905/MPLAB2.htm (3481 words)

	Chapter 567 — Experiment Stations
		The Astor experiment station shall be under the control and management of the State Board of Higher Education as a branch of Oregon State University.
		The director of the Oregon experiment stations may conduct in Umatilla County crop rotation experimental and demonstration work for the purpose of establishing a profitable cropping system that will reduce the summer fallow acreage, decrease the present size of the farm unit necessary to make a living and stabilize land values.
		The station shall be under the control and management of the State Board of Higher Education through its director of the Oregon agricultural experiment station, as a branch station of the Oregon agricultural experiment station.
	www.leg.state.or.us /ors/567.html (2411 words)

	Middeck Active Control Experiment
		The Middeck Active Control Experiment (MACE) is a United States Space Shuttle flight experiment manifest for launch on STS-67 in February, 1995.
		Space Systems The performance achieved by controlling the flexibility in the system is compared to standard industry practice where instrument pointing servo control is closed with a bandwidth roughly equal to one tenth of the frequency of the first flexible mode.
		Since this model was used to design modern state-space controllers, it had to include all the sensors and actuator dynamics, the reaction and gimbal servo controls, and the effects of using a digital controller.
	ssl.mit.edu /flight/mace.html (3146 words)

	International Journal of Electrical Engineering Education: A computer-based voltage control experiment for advanced ... (Site not responding. Last check: 2007-10-09)
		Using the experiment the student is trained in understanding power system voltage performance in operation and the control measures in abnormal conditions.
		For an N bus power system with M control measures, the relationship between the bus voltages and the control measures can be represented as shown in Fig.
		The programme provides a better understanding of voltage control and remedial action in power system operation without the need to perform hardware experiments which are time consuming and expensive to set up.
	www.findarticles.com /p/articles/mi_qa3792/is_200107/ai_n8981364 (653 words)

	Automatic Control Telelab - User Manual
		The only difference with respect to the predefined controller is that now, to run an experiment, it is needed to upload to the server a Simulink model which implements the user controller.
		For each controller it is then possible to see some general data and a time plot of the experiment.
		Rules about how to write a controller are the same as for user-defined controllers (how to design a controller).
	www.dii.unisi.it /~control/act/guide.php (1083 words)

	STS-106 Experiment: Middeck Active Control Experiment Reflight (MACE II)
		The Middeck Active Control Experiment Reflight, or MACE II, Program research will provide data on decreasing the effects of vibration in moving structures in space.
		The MIT science team is investigating the control of systems whose characteristics change over time, or due to changes in their geometry, such as when an antenna is moved through a large angle from one position to another.
		All data from the experiment is stored to removable hard drives for future analysis on the ground.
	www.shuttlepresskit.com /STS-106/experiment55.htm (550 words)

	Virtual Control Laboratory Manual (Site not responding. Last check: 2007-10-09)
		The aim of this section of the ECOSSE IGDS Control HyperCourse is to allow you to carry out actual laboratory experiments on the computer.These have been modelled to be as realistic as possible and the documentation may include photographs of the actual experimental apparatus.
		The value of the deadzone affects the accuracy of the controller, hence another aim of this experiment could be to find the relationship between the precision obtained and the amount of oscillation in the measured variable.
		The aim of the second experiment is to evaluate the gain matrix and RGA and show that there is only one way to match up these variables (the flow out from the tank does not have any effect on the concentration in the tank).
	www.chemeng.ed.ac.uk /~igds/Control/lab/intro.html (2429 words)

	Lab PR/LEV: Pressure Level Control Experiment
		To control the liquid level and gas pressure in a tank simultaneously at given set points.
		The override controller should reduce the air pressure set point in the tank so that the tank does not run empty.
		Make sure that the controller gain is not so large as to cause saturation even for small changes in the process variable.
	wuche.wustl.edu /~joseph/462/PROJECTS/PLC97.htm (934 words)

	DEC Approves Deer Tick Control Experiment (Site not responding. Last check: 2007-10-09)
		The program, conducted by a Fordham University researcher, will assess whether a pesticide applied to wild deer in the field can be useful in controlling the deer tick, which is responsible for the spread of Lyme disease and human granulocytic ehrlichiosis (HGE).
		The experimental use permit issued by DEC allows a three-year trial of Point-Guard, a pesticide containing the active ingredient amitraz, applied directly to deer by contact at bait stations located in the Town of Bedford, Westchester County.
		The pesticide is already approved in New York for direct application to swine to control mites and lice.
	www.dec.state.ny.us /website/press/pressrel/97x175.html (631 words)

	control. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
		To reduce or prevent the spread of: control insects; controlled the fire by dousing it with water.
		To verify or regulate (a scientific experiment) by conducting a parallel experiment or by comparing with another standard.
		An individual or group used as a standard of comparison in a control experiment.
	www.bartleby.com /61/0/C0610000.html (286 words)

	A Quadruple Tank Process Control Experiment (Site not responding. Last check: 2007-10-09)
		The most novel aspect of the apparatus is that it has a configuration in which the time-varying movement of a right half plane transmission zero across the imaginary axis makes it impossible to control the process with a linear feedback controller.
		This appears to be the first educational laboratory experiment designed to clearly illustrate the extreme effects that time-varying dynamics can have on controllability of the process.
		Example identification and control results illustrate the use of the experiment in an undergraduate process control laboratory.
	cee.che.ufl.edu /Journals/summer2004/rusli.html (116 words)

	SSTL : Educational Activities (Site not responding. Last check: 2007-10-09)
		Actively Controlled Buildings: A table of 33 actively controlled buildings and towers from around the world and some basic information on the buildings and towers and thier control systems.
		Bridges Employing Active Control During Erection:A table of 9 bridges which have employed active control on one or more of their bridge towers during erection of the bridge.
		Video Clip of the AMD Experiment - MPEG, 1.3 MB This video clip demonstrates the effectiveness of the Active Mass Driver System for Structural Control through use of a split screen display.
	cee.uiuc.edu /sstl/education (774 words)

	OHB-System - Advanced Thermal Control Experiment...
		The experiment is currently being tested on the US Shuttle Mission STS 107 which started on January 16th, 2003.
		OHB has the overall responsibility for experiment control and data evaluation during the mission.
		Based on the data received the experiment can be consider a major success after only five of the 16 mission days.
	www.ohb-system.de /News/presse/2201_03.html (165 words)

	Control Experiment: Damped Compound Pendulum with Motor
		Control systems design is a subject that is best learned with hands-on exercises that both motivate and reinforce theory.
		The control objective is to reach the same steady-state angle, but with faster rise and settling times.
		A general rule of thumb in control design is to sample at least 4 to 20 times the rise time.
	prism2.mem.drexel.edu /~paul/thrustTester/thrustTester.html (2194 words)

	:: NASA Quest > Aerospace :: (Site not responding. Last check: 2007-10-09)
		This part of the plane is the aileron and controls movement around the longitudinal axis.
		These are the elevators and they control movement around the lateral axis.
		This is the rudder and it controls movement around the vertical axis.
	quest.arc.nasa.gov /aero/wright/teachers/wfomanual/science/glider.html (864 words)

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