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Topic: State space (controls)

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In the News (Sun 21 Jul 19)

  StateSpace - Portland State Aerospace Society
Sometimes state space representations are very convenient, when they are not, consider using something else.
A set of state variables is theoretically minimal if together they are sufficient to describe every aspect of the system, but elimination of any variable, singly or in combination, leaves at least some of the system unobservable.
In traditional control theory, as opposed to "modern" state space methods, transfer functions are often used.
psas.pdx.edu /StateSpace   (1791 words)

  Control theory - Wikipedia, the free encyclopedia
Controllability and observability are main issues in the analysis of a system before deciding the best control strategy to be applied.
Controllability is related to the possibility of forcing the system into a particular state by using an appropriate control signal.
Adaptive controls were applied for the first time in the Aircraft industry in the 1950s, and have found particular success in that field.
en.wikipedia.org /wiki/Control_theory   (2448 words)

 State Space -- Recommendations and Resources   (Site not responding. Last check: 2007-11-02)
To abstract from the number of inputs, outputs and states, the variables are expressed as vectors and the differential and algebraic equations are written in matrix form.
Unlike the frequency domain approach, the use of the state space representation is not limited to systems with linear components and zero initial conditions.
State variables must be linearly independent; a state variable cannot be a linear combination of other state variables.
www.becomingapediatrician.com /health/141/state-space.html   (751 words)

 Controls Overview
Controls can also provide transparent (to the client) resource management of connections, sessions, or other resources to be obtained on behalf of the client, held for an appropriate resource scope to achieve best performance, and then released.
Controls also provide an extensibility model that allows customized view of a resource to be constructed, with discrete operations defined as methods on the control.
Controls also support an extensibility model that allows operations on a resource to be defined using a customized interface that extends the base public resource interface, and defines metadata-annotated operations on the resource.
beehive.apache.org /docs/1.0/controls/overview.html   (4631 words)

 [No title]
If you disable view state on a control whose change notification event you are handling, it won't fire correctly since it must always assume that the previous value was the same as the default value in the form.
Control state is another type of hidden state reserved exclusively for controls to maintain their core behavioral functionality, whereas view state only contains state to maintain the control's contents (UI).
Technically, control state is stored in the same hidden field as view state (being just another leaf node at the end of the view state hierarchy), but if you disable view state on a particular control, or on an entire page, the control state is still propagated.
msdn.microsoft.com /msdnmag/issues/04/10/ViewState/default.aspx   (2902 words)

 Limited Test Ban Treaty
The United States continued to be unwilling to accept the Soviet basic proposition that a test ban could be agreed to and controls instituted subsequently, or to accept indefinite test suspensions that were tantamount to endorsing an uncontrolled prohibition.
Although the United States and the United Kingdom had originally proposed that the control posts should be internationally owned and operated, they later agreed to national ownership and operation of the posts, as the Soviet Union insisted, with international monitoring and supervision.
For States whose instruments of ratification or accession are deposited subsequent to the entry into force of this Treaty, it shall enter into force on the date of the deposit of their instruments of ratification or accession.
www.state.gov /t/ac/trt/4797.htm   (3898 words)

 DSpace at MIT: Hazard elimination using backwards reachability techniques in discrete and hybrid models
State machine models are very powerful, but also present greater challenges in terms of reachability, including the backwards reachability needed to implement the Hazard Automaton Reduction Algorithm.
Therefore, only a finite number of matrix manipulations is necessary to determine whether or not a state is reachable from another state, thus providing the same information that could be obtained from a complete backwards reachability graph of the state machine model.
Unlike model checking, the computational cost does not increase as greatly with the number of backward states that need to be visited to obtain the information necessary to ensure that the design is safe or to redesign it to be safe.
dspace.mit.edu /handle/1721.1/8099   (456 words)

 Space Suits
To explore and work in space, human beings must take their environment with them because there is no atmospheric pressure and no oxygen to sustain life.
US spacesuits have been pressurized at 0.30 bar (30% earth sea level pressure), but because the gas in the suit is 100 percent oxygen instead of 20 percent, the person in a spacesuit actually has more oxygen to breathe than is available at an altitude of 3,000 m without the spacesuit.
The space sled approach was dropped in preference to the shuttle manned maneuvering unit.
www.astronautix.com /craftfam/spasuits.htm   (5964 words)

 math lessons - State space (controls)
In control engineering, a state space representation is a mathematical model of a physical system as a set of input, output and state variables related by first-order differential equations.
In electronic systems, the number of state variables is the same as the number of energy storage elements in the circuit (capacitors and inductors).
x is the "state vector", y is the "output vector", u is the "input (or control) vector", A is the "state matrix", B is the "input matrix", C is the "output matrix", and D is the "feedthrough (or feedforward) matrix".
www.mathdaily.com /lessons/State_space_(controls)   (1240 words)

 Lighting Control & Design: State Energy Codes   (Site not responding. Last check: 2007-11-02)
Each space enclosed by ceiling-height partitions shall have at least one control device to independently control the general lighting within the space.
Control a maximum of 2,500 square feet (232 m²) area for a space 10,000 square feet (929 m²) or less and a maximum of 10,000 square feet (929 m 2) area for a space greater than 10,000 square feet (929 m²), and
Supplemental task lighting, including permanently installed under-shelf or under-cabinet lighting, shall have a control device integral to the luminaires or be controlled by a wall-mounted control device provided the control device is readily accessible and located so that the occupant can see the controlled lighting.
www.lightingcontrols.com /support/statecodes/excerpts/excerpts.asp?state=FL   (1303 words)

 Rutan's Rocket Plane Touches Edge Of Space
Melvill gradually took control of the craft again and from 25 kilometers (80,000 feet) altitude, it glided for about 17 minutes back to the landing.
Rutan and Allen are aiming to bring space flight within the range of the general public as well as win a prize for the first private mission beyond Earth's atmosphere.
Rutan is also eyeing a 10-million-dollar prize for the first privately funded space vehicle that can carry two passengers and a pilot to an altitude of 100 kilometers (62.5 miles) twice in two weeks.
www.rense.com /general54/ruit.htm   (593 words)

 WI DPI: Division for Libraries..., Public Library Space Needs: A Planning Outline
Final space allocations will be based on further evaluation of the specific routines to be accomplished at each work station and the amount of furniture and equipment necessary to support those routines.
Special use space typically constitutes about 10 percent of the overall or gross area in a public library building, but depending on a library’s anticipated service program, the allocation of special use space may be a little larger or a little smaller.
The NCES works with state library agencies across the country to assemble the annual report data submitted by all of the nation’s public libraries into one consolidated database, which is on the NCES’s site.
www.dpi.state.wi.us /pld/plspace.html   (7739 words)

 Attachment S: Site Accessibility
There should be one lavatory which is accessible (30" x 48" clear floor space in front; maximum of 19" depth under the lavatory; rim no higher than 34"; minimum of 29" from the floor to the bottom of the lavatory apron; with hardware operable with one closed fist).
Doors to the guest room and bathroom should be 32" wide, have 18" of clear wall space on the pull side of the door, be easy to open (5 pound force maximum; hardware no higher than 48" and operable with a closed fist); with thresholds no higher than 1/2" beveled.
The lavatory should have 30" x 48" clear floor space in front; maximum of 19" depth under the lavatory; rim no higher than 34"; minimum of 29" from the floor to the bottom of the lavatory apron; with hardware operable with one closed fist.
www.state.hi.us /health/dcab/psmanual/attachments.htm   (1930 words)

 NOVA Features Penn State Space Scientists on 31 October | SpaceRef - Your Space Reference
A NOVA video crew visited Penn State earlier this year to film scientists working at the control center for the Swift satellite, which is dedicated to studying the formation of fl holes throughout the universe.
Penn State controls Swift's science and flight operations for NASA from the Penn State Mission Operations Center, and Penn State led in the development and assembly of two of Swift's three telescopes.
The X-ray Telescope resulted from Penn State's collaboration with the University of Leicester in England and the Brera Astronomical Observatory in Italy, and the Ultraviolet/Optical Telescope from a collaboration with the Mullard Space Science Laboratory of the University College-London.
www.spaceref.com /news/viewpr.html?pid=21152   (1211 words)

 Space Station Construction Resumes with Successful Atlantis Mission
Washington -- Space shuttle Atlantis and its six-member STS-115 crew glided to a landing early on September 21 at Kennedy Space Center in Florida, completing a successful mission to resume construction of the International Space Station and a journey of 7.8 million kilometers.
All 12 astronauts in space at that time were able to have a conversation.
Commander Michael Lopez-Alegria and cosmonaut Mikhail Tyurin of the 14th International Space Station crew docked at the station in the early morning hours of September 20 to begin a six-month stay on the orbiting laboratory.
usinfo.state.gov /xarchives/display.html?p=washfile-english&y=2006&m=September&x=20060921123000lcnirellep0.7709162   (1204 words)

The State of Being sound is a strong blend of electro-rock, infused with elements of Goth and Electronica.
It's interesting that State of Being's first release ten years ago was titled "Dysfunctional Vision." SOB brainchild and lead singer Christopher Foldi has remained true to his original vision, while allowing it to evolve and mature.
State of Being music can also be found on the soundtrack of the independent film, "Cemetery Days" (Head2Head productions) and the supernatural comedy-feature film, "So, You've Downloaded A Demon" (Accidental Films).
www.myspace.com /stateofbeing   (1000 words)

 China Space News
The launch of the Chang'e I, envisaged in the second half of 2007, would be a landmark for China's space programme, China's space agency chief Sun Laiyan was quoted as saying by the official Xinhua news agency.
Seventeen "space peonies" that sprouted from seeds that orbited the Earth on the Shenzhou-III spaceship in 2002 are in full bloom in Heze, in East China's Shandong Province.
China is on schedule to have a man walk in space for the first time next year after engineers finished the design of a home-grown suit for the mission, state press reported Monday.
www.spacedaily.com /dragonspace.html   (1138 words)

 [No title]
This control is referred to as resonance because the harmonic content of the original signal is accentuated when the control is advanced.
The resonance control circuit simply applies from ground to -10 volts to R46 that controls the "amp bias input" of U6-A and thus its transconductance linearly.
The resonance control signal XRES is expected to be -5V to +5 volts.
www.musicfromouterspace.com /analogsynth/STATEVARVCFFEB2006/STATEVARVCFFEB2006.html   (2233 words)

 K-State Undergraduate Catalog 2006-2008: Mechanical and Nuclear Engineering
Control of Mechanical Systems I. Introduction to modeling and control of dynamic systems encountered by mechanical engineers.
State space-control theory fundamentals are presented in addition to an introductory treatment of several major systems areas.
Topical material of importance in nuclear engineering, such as controlled thermonuclear reactions, numerical analysis, Monte Carlo methods in radiation transport, effects of nuclear explosions, etc. Pr.: Consent of head of department.
courses.k-state.edu /catalog/undergraduate/en/mne.html   (1767 words)

 Sarbanes Oxley Internal Controls   (Site not responding. Last check: 2007-11-02)
Paul Sarbanes 1: 3: '''Paul Spyros Sarbanes '''(born February 3, 1933) is the senior 6: Paul Sarbanes was born in the Maryland Eastern Shore city of 8: and, graduating first in his class in 1957.
The controls for rotory wing aircraft (helicopter or aut 4: wing position of aileron, flap and slat '''flight controls '''.
The Throttle controls the volume of fuel/air mixture delivered to the c 18: *Carburetor Heat Control - Controls the application of heat to the carburetor venturi 27: *Fuel Boost Pump Switch - Controls the operation of the auxiliary electric fuel pump
www.relativeaccess.com /File/38805-Sarbanes.Oxley.Internal.Controls.Html   (619 words)

 Global Network - Statement of Concern
The U.S. Space Command, headquartered in Colorado Springs, Colorado, has publicly stated that it intends "to control space in order to protect U.S. interests and investments." It is crucial that the movement to stop this new round in the arms race moves quickly ahead.
The U.S. is now exploring ways to circumvent international space law in order to "exploit" these planetary bodies so that corporate interests may secure the enormous financial benefits expected from this Mining the Sky as is described by NASA scientist John Lewis in his book by the same title.
As we prepare to move into the 21st century it is crucial for peace and environmental activists to view space as an area of concern.
www.space4peace.org /statement/concern.htm   (843 words)

 Heading 1
In essence, the model needed to have an internal state (memory) that was perpetually updated by a control loop (the processor) until a final state was reached (termination).
The state of an object can be thought of as a point in a state space.
We separate the state space and methods into a class because many objects may share the same state space and methods, even though they have different states.
www.cs.sjsu.edu /faculty/pearce/ooad/chp2/chp2.htm   (1048 words)

 Bureau of Political-Military Affairs
State Foreign Policy Advisors (POLADs) to U.S. and NATO Military Commanders
The Bureau of Political-Military Affairs (PM), led by Acting Assistant Secretary Stephen Mull, is the principal link between the Departments of State and Defense.
On any given day, the Weapons Abatement and Removal staff may be addressing a Rotary Club in Arizona, chairing a 24-nation donor meeting in New York, or donning body armor to monitor programs in minefields in some 25 countries around the world.
www.state.gov /t/pm   (333 words)

 Control Theory Encyclopedia @ NaturalResearch.org (Natural Research)   (Site not responding. Last check: 2007-11-02)
Unobservable poles are not present in the transfer function realization of a state-space representation, which is why sometimes the latter is preferred in dynamical systems analysis.
The main article for this category is Control theory.
There are 2 subcategories shown below (more may be shown on subsequent pages).
www.naturalresearch.org /encyclopedia/Control_theory   (1922 words)

 SPACE.com -- Role Reversal: Planet Controls a Star
space telescope, which recently observed slight variations in the light from tau Bootis ("tau Boo" for short) - a star 50 light years away with a planet in a tight, 3.3-day orbit around it.
MOST was designed to see changes of a part per million in the brightness of stars.
According to Matthews, this is equivalent to standing outside the Empire State Building with all its lights on and noticing when someone pulls down one window shade by half an inch.
www.space.com /scienceastronomy/050523_star_tide.html   (818 words)

 Iowa State To Unveil The Most Realistic Virtual Reality Room In The World
The public is invited to tour C6 -- Iowa State's 10-foot by 10-foot virtual reality cube that immerses users in computer-generated 3-D images and eight channels of audio -- from 9 a.m.
Iowa State's C6 opened in June 2000 as the country's first six-sided virtual reality room designed to immerse users in images and sound.
Oliver is leading the research team that's using C6 to develop a control interface for the military's next generation of unmanned aerial vehicles.
www.space-travel.com /reports/Iowa_State_To_Unveil_The_Most_Realistic_Virtual_Reality_Room_In_The_World_999.html   (1177 words)

 State space (controls)   (Site not responding. Last check: 2007-11-02)
The minimum number of state variables required to represent a given system, n, is usually equal to the order of the system's defining differential equation.
The most general state space representation of a system with p inputs, q outputs and n state variables is written in the following form:
Healthcare.com is the #1 state space controls resource.
www.guideofpills.com /State_space_%28controls%29.html   (1439 words)

 Reliable Controls - Input and Output (I/O) Devices
Input and output (I/O) devices are used by the Reliable Controls® MACH-System™ to measure and control the physical world.
Entire range of mechanical and solid state relays that have been tested and approved for use with our controller outputs.
Reliable Controls® and the Reliable Controls® logo are registered trademarks of Reliable Controls Corporation.
www.reliablecontrols.com /products/iodevices   (137 words)

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