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PID controller

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	PID controller - Wikipedia, the free encyclopedia
		In a PID loop, the correction that's added is calculated from the error in three ways, to cancel out the present error, average out past errors, and anticipate the future a bit from the slope of the error(s) over time.
		Digital implementations of a PID algorithm may have limitations owing to the sampling rate of the data, and the limits of internal calculation and precision.
		Electronic analog PID control loops are often found within more complex electronic systems, for example, the head positioning of a disk drive, the power conditioning of a power supply, or even the movement-detection circuit of a modern seismometer.
	en.wikipedia.org /wiki/PID_controller (2652 words)

	Pelvic inflammatory disease (PID): Information for students
		PID refers to the acute clinical syndrome attributed to the ascending spread of infection in women from the vagina and endocervix to the endometrium (lining of the uterus), fallopian tubes, and/or adjoining structures.
		Chlamydia is responsible for about 50% of PID cases, and gonorrhoea is the cause in 25% of cases.
		PID is usually caused by a sexually transmitted infection, but gynaecological surgical procedures such as abortion or the insertion of an intra-uterine device (IUD) can cause the infectious agents to spread upwards from the cervix and vagina.
	www.stdservices.on.net /std/pid/details.htm (893 words)

	STD Facts - Pelvic inflammatory disease (PID)
		PID occurs when bacteria move upward from a woman's vagina or cervix (opening to the uterus) into her reproductive organs.
		A prior episode of PID increases the risk of another episode because the reproductive organs may be damaged during the initial bout of infection.
		PID is difficult to diagnose because the symptoms are often subtle and mild.
	www.cdc.gov /std/PID/STDFact-PID.htm (1671 words)

	PID
		PID is inflammation caused by infections ascending from the vagina or cervix to the upper genital tract.
		PID is the most common serious infection of women aged 16 to 25 years of age.
		PID is usually a result of sexually transmitted infection and is much more common among women who have multiple partners and among women who don't use latex.
	www.brown.edu /Student_Services/Health_Services/Health_Education/general_health/wh_pid.htm (434 words)

	American Social Health Association - Learn about STDs/STIs
		Pelvic inflammatory disease (PID) is a serious infection in the upper genital tract/reproductive organs (uterus, fallopian tubes and ovaries) of a female.
		In the United States, PID is the leading cause of infertility in women (the inability to have children).
		It is possible for a woman to have PID and be asymptomatic (without symptoms), or have symptoms too mild to notice, for an unknown period of time.
	www.ashastd.org /learn/learn_pid.cfm (904 words)

	PID without a PhD
		PID (proportional, integral, derivative) control is not as complicated as it sounds.
		In a typical PID controller these elements are driven by a combination of the system command and the feedback signal from the object that is being controlled (usually referred to as the "plant").
		The elements of a PID controller presented here either take their input from the measured plant output or from the error signal, which is the difference between the plant output and the system command.
	www.embedded.com /2000/0010/0010feat3.htm (4742 words)

	Pelvic Inflammatory Disease (PID) -- familydoctor.org (Site not responding. Last check: 2007-10-29)
		Pelvic inflammatory disease (PID) is an infection in the female reproductive organs (uterus, fallopian tubes and ovaries).
		PID can also occur if bacteria infect your internal organs as a result of giving birth, or having a miscarriage, an abortion or a procedure to take a sample from the inside of the womb for laboratory testing.
		Sometimes PID can occur after the cervix is treated because of an abnormal Pap smear or after the insertion of an intrauterine device (IUD).
	familydoctor.org /213.xml (931 words)

	Pelvic Inflammatory Disease (PID) - WomensHealthChannel
		PID can be acute (short, sudden flare-up) or chronic (persistent inflammation and infection).
		PID is one of the most common and serious complications of sexually transmitted diseases (STDs) in women.
		PID caused by chlamydia is typically "silent," that is, asymptomatic and of which the woman is unaware.
	www.womenshealthchannel.com /pid/index.shtml (543 words)

	Using a PID-based Technique For Competitive Odometry and Dead-Reckoning
		The equivalent to the PID equation in [1] is derived by substituting the results from [2] and performing the appropriate integration and differentiation.
		PID Tutorial, I was able to develop a set of parameters that worked reasonably well for Peeves.
		Although we could use the PID logic to adjust for the lateral deviation (treating it as the integral error term in the PID equation), the magnitude of the error might be too large to be absorbed by the compensation logic.
	seattlerobotics.org /encoder/200108/using_a_pid.html#SteeringEquations (7136 words)

	PID Controller laboratory
		PID controllers are widely used in industrial practice more than 60 years.
		The PID controller is a standard and proved solution for the most of industrial control applications.
		PID tuning in one minute "I am always full of admiration in front of such java applet, so compact and so responsive, and also so nice looking when compared to MATLAB GUI developments.
	www.pidlab.com (535 words)

	PID (pelvic inflammatory disease) definition - Medical Dictionary definitions of popular medical terms
		PID refers exclusively to ascending infection of the female upper genital tract (the female structures above the cervix).
		PID is the most common and serious complication of sexually transmitted diseases (STDs), aside from AIDS, among women.
		A prior episode of PID increases the risk because the body's defenses are often damaged during the initial bout of upper genital tract infection.
	www.medterms.com /script/main/art.asp?articlekey=4898 (776 words)

	Murph's Silvia PID Page (Site not responding. Last check: 2007-10-29)
		As the boiler approaches the desired temperature, the PID turns the heating element on for shorter intervals -- like a driver braking harder the closer he gets to the stop sign (this is where the proportional, integral and derivative calculations come in).
		Once the boiler is at the desired temperature, the PID cycles the heating element on and off at intervals calculated to hold the boiler very close to that temperature.
		Actually mounting the PID in the enclosure is simple enough once the opening is prepared: Slip the white mounting collar over the PID, slide the PID into the enclosure, then cinch the mounting collar up tight against the inside of the enclosure.
	www.murphyslawonline.com /silvia (3266 words)

	Pelvic Inflammatory Disease, NIAID Fact Sheet (Site not responding. Last check: 2007-10-29)
		Pelvic inflammatory disease (PID) is a general term that refers to infection and inflammation of the upper genital tract in women.
		PID is the most common preventable cause of infertility in the United States.
		PID can be difficult for a health care provider to diagnose because symptoms can be subtle and mild and are like those of some other diseases.
	www.niaid.nih.gov /factsheets/stdpid.htm (1412 words)

	Pelvic Inflammatory Disease (PID) (Site not responding. Last check: 2007-10-29)
		Pelvic inflammatory disease (PID) is a general term that refers to infection of the fallopian tubes (tubes that carry eggs from the ovary to the womb) and of other internal reproductive organs in women.
		Women on treatment for PID should be re-evaluated by their health care provider two to three days after starting treatment to be sure the antibiotics are working to cure the infection.
		A prior episode of PID increases the risk of another episode because the body's defenses are often damaged during the initial bout of infection.
	www.dhss.delaware.gov /dhss/dph/dpc/pid.html (1617 words)

	Pelvic Inflammatory Disease (PID)
		PID is a leading cause of infertility in the United States.
		Following PID, scarring will cause approximately 20 percent of women to become infertile, 18 percent to develop chronic pelvic pain, and 9 percent to have ectopic pregnancies.
		PID can cause scarring in the fallopian tubes, which can lead to tubal pregnancy (a life-threatening pregnancy in which there is no chance of producing a baby).
	www.coolnurse.com /pid.htm (668 words)

	MedlinePlus Medical Encyclopedia: Pelvic inflammatory disease (PID)
		Although sexual transmission is the most common cause of PID, bacteria may enter the body after gynecological events or procedures such as IUD insertion (intrauterine device used for contraception), childbirth, spontaneous abortion (miscarriage), therapeutic or elective abortion, and endometrial biopsy.
		However, oral contraceptives may in other cases have a protective role against developing PID because they stimulate the body to produce a thicker cervical mucous, which is harder for semen (which may contain bacteria) to penetrate.
		Early diagnosis of mild PID may be treated on an outpatient basis with antibiotics and close follow-up.
	www.nlm.nih.gov /medlineplus/ency/article/000888.htm (797 words)

	CHP - PID (Site not responding. Last check: 2007-10-29)
		This device uses ultraviolet light as a means of ionizing an analyte exiting from a GC column.
		Although most PIDs have only one lamp, lamps in the PID are exchanged depending on the compound selectivity required in the analysis.
		Since only a small (but basically unknown) fraction of the analyte molecules are actually ionized in the PID chamber, this is considered to be a nondestructive GC detector.
	www.chem.vt.edu /chem-ed/sep/gc/detector/pid.html (503 words)

	Pelvic Inflammatory Disease
		Pelvic Inflammatory Disease, or PID for short, is actually a spectrum of diseases that affect women only.
		PID rates are highest among sexually active adolescents.
		PID can be caused by a number of different bacteria.
	www.afraidtoask.com /STD/pid.html (398 words)

	PID \| RAE Systems
		The IAQRAE is the only indoor air quality (IAQ) monitor to combine a photoionization detector (PID) with traditional measures of IAQ such as temperature, humidity, carbon dioxide (CO), and a user-selected toxic gas sensor in one one-to-five sensor package.
		The RAEGuard PID is a permanently mounted photoionization detector (PID) transmitter for monitoring volatile organic compounds (VOCs).
		Housed in an explosion-proof enclosure, the RAEGuard PID is equipped with a local digital display of gas concentration and functional keys for performing calibration.
	www.raesystems.com /products/pid (823 words)

	PID Control
		PID Control (proportional-integral-derivative) is by far the widest type of automatic control used in industry.
		There are many subtly different forms of PID controller, and the structure you are working with needs to be taken into account when tuning and designing the control system.
		Basically, PID time-proportional is a way to control the CV of your PID loop using a discrete output.
	www.isc-ltd.com /resource_centre/tech_pid.html (714 words)

	What is PID - Tutorial
		Note that manufacturers are not consistent and often use reset in units of time/repeat or integral in units of repeats/time.
		With a PID controller the amplitude ratio now has a dip near the center of the frequency response.
		In general, for the tightest loop control, the dynamic controller gain should be as high as possible without causing the loop to be unstable.
	www.expertune.com /tutor.html (801 words)

	PlanetMath: PID
		is irreducible (and prime since any PID is also a UFD).
		This is version 4 of PID, born on 2001-11-04, modified 2006-02-07.
		Object id is 674, canonical name is PID.
	planetmath.org /encyclopedia/PID.html (110 words)

	eMedicine - Pelvic Inflammatory Disease : Article by Stephanie Abbuhl, MD (Site not responding. Last check: 2007-10-29)
		Pathophysiology: PID is caused by organisms ascending to the upper female genital tract from the vagina and cervix.
		Depending on the severity of the infection, patients with PID may be minimally symptomatic or may present with toxic symptoms of fever, nausea, vomiting, and severe pain.
		Diagnosis also is complicated because a subset of women with PID appear to exhibit subtle symptoms that often are undiagnosed by a health care provider or are unappreciated by the patient.
	www.emedicine.com /emerg/topic410.htm (2831 words)

	PID (Site not responding. Last check: 2007-10-29)
		PID (pelvic inflammatory disease) is an infection of a woman's pelvic organs (uterus, fallopian tubes, and ovaries).
		The major symptoms of PID are lower abdominal pain and abnormal vaginal discharge.
		PID may become a chronic and relapsing condition as a woman's immune system deteriorates.
	www.4woman.gov /HIV/oispid.cfm (379 words)

	Pelvic Inflammatory Disease (PID)
		Pelvic inflammatory disease, sometimes called PID, is a progressive (meaning it becomes worse over time) infection of the fallopian tubes, uterus, cervix, or ovaries.
		PID can cause scarring in a girl's ovaries, fallopian tubes, and uterus, and widespread scarring may lead to infertility (the inability to have a baby).
		If someone who has had PID does get pregnant, scarring of the fallopian tubes may cause the fertilized egg to implant in one of the fallopian tubes rather than in the uterus.
	kidshealth.org /teen/sexual_health/stds/std_pid.html (439 words)

	ONLamp.com -- Discovering System Processes
		Usually, the PID will be associated with, and have the same permissions as, the user who started the program and that user's primary group.
		The numbers under the TTY column are the PIDs of the processes.
		PID TT STAT TIME COMMAND 2100 v0 Ss 0:00.13 -csh (csh) 2286 v0 R+ 0:00.00 ps 313 v1 Is+ 0:00.13 -csh (csh) 314 v2 Is+ 0:00.21 -csh (csh) 315 v3 Is 0:00.12 -csh (csh)
	www.onlamp.com /pub/a/bsd/2000/11/15/FreeBSD_Basics.html (1095 words)

	Sexually Transmitted Diseases: Part 1
		About 10-20% of cervical infections result in gonococcal pelvic inflammatory disease (PID) due to upward spread of the bacteria resulting in endometritis, salpingitis, tubovarian abscesses; image 1 and image 2, pelvic peritonitis and other local complications.
		Pelvic inflammatory disease (PID) is a disease of women defined as the clinical syndrome resulting from the ascending spread of microorganisms from the vagina and endocervix to the endometrium, the fallopian tubes and/or to contiguous structures.
		Close medical follow-up is essential in PID patients due to the higher failure rates of therapeutic regimens.
	www.kcom.edu /faculty/chamberlain/Website/lectures/lecture/std.htm (3472 words)

	sci.engr.* FAQ on PID Controller Tuning
		Although many architectures exist for control systems, the PID controller is mature and well-understood by practitioners.
		In motion control, a full PID might include a first-order filter in front of the SP memory, to separate the system poles.
		This is essential if you choose PID on single loops instead of some multivariable method for motion control.
	www.tcnj.edu /~rgraham/PID-tuning.html (2105 words)

	Technical Reference - Tuning a PID Controller
		The NEWPORT MICRO-INFINITY® is a full function “Autotune” (or self-tuning) PID controller which combines proportional control with two additional adjustments, which help the unit automatically compensate to changes in the system.
		A PID (three-mode) controller is capable of exceptional control stability when properly tuned and used.
		Normally an AUTO PID tuning feature will eliminate the necessity to use this manual tuning procedure for the primary output, however, adjustments to the AUTO PID values may be made if desired.
	www.newportus.com /Products/Techncal/techncal.htm (2919 words)

	CTM: PID Tutorial
		This error signal (e) will be sent to the PID controller, and the controller computes both the derivative and the integral of this error signal.
		The signal (u) just past the controller is now equal to the proportional gain (Kp) times the magnitude of the error plus the integral gain (Ki) times the integral of the error plus the derivative gain (Kd) times the derivative of the error.
		When you are designing a PID controller for a given system, follow the steps shown below to obtain a desired response.
	www.engin.umich.edu /group/ctm/PID/PID.html (1195 words)

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