000			03795nam a22004815i 4500
001			978-0-387-78793-0
003			DE-He213
005			20251006084419.0
007			cr nn 008mamaa
008			100301s2008 xxu| s |||| 0|eng d
020			_a9780387787930
020			_a99780387787930
024	7		_a10.1007/978-0-387-78793-0 _2doi
082	0	4	_a629.8 _223
100	1		_aGawronski, Wodek. _eeditor.
245	1	0	_aModeling and Control of Antennas and Telescopes _h[electronic resource] / _cedited by Wodek Gawronski.
264		1	_aBoston, MA : _bSpringer US, _c2008.
300			_bonline resource.
336			_atext _btxt _2rdacontent
337			_acomputer _bc _2rdamedia
338			_aonline resource _bcr _2rdacarrier
347			_atext file _bPDF _2rda
490	1		_aMechanical Engineering Series, _x0941-5122
505	0		_aModeling -- Analytical Models -- Models from Identification -- Model Reduction -- Wind Disturbance Models -- Control -- Preliminaries to Control -- PI and Feedforward Controllers -- LQG Controller -- H ? Controller -- Single Loop Control -- Non-Linear Control -- RF Beam Control -- Track-Level Compensation.
520			_aModeling and Control of Antennas and Telescopes presents the author's research and field experience in the area of antenna modeling, dynamics, and control. The required spacecraft tracking accuracy of 1 mdeg was the impetus for the new approaches to the antenna controls that use model based controllers (LQG and H¥ ). Consequently, modeling also required a new approach using system identification techniques. Most of the material presented is new in the telescope industry. The methods have been not only analyzed and tested, but actually implemented, giving confidence in the final result, which is significantly increased antenna pointing accuracy. The author explains two different approaches to telescope modeling: analytical and experimental. The analytical approach combines the structural and drive model, using Matlab and Simulink. The experimental, uses the test data to obtain the equations of the antenna model. Both models are excessively large and the model reduction techniques included make the model size small enough for the controller design purposes. The book also covers the wind models based on the wind tunnel data (steady-state), and on the field data (gusts) since wind gusts are the main antenna disturbance. The book shows the PI and feedforward controller tuning and their performance as a benchmark for measuring the pointing improvement when the LQG and H¥ are implemented. The properties, performance, and tuning of the LQG and H¥ are also presented. The material explains the nonlinear control issues such as velocity and acceleration limits, friction, and backlash. It also covers RF beam control techniques (scanning and monopulse), and the open loop control of the track level unevenness. Modeling and Control of Antennas and Telescopes serves as a useful reference for students and engineers in the area of antenna modeling, dynamics, and control.
650		0	_aENGINEERING.
650		0	_aMECHANICAL ENGINEERING.
650		0	_aMICROWAVES.
650	1	4	_aENGINEERING.
650	2	4	_aCONTROL, ROBOTICS, MECHATRONICS.
650	2	4	_aSTRUCTURAL MECHANICS.
650	2	4	_aMICROWAVES, RF AND OPTICAL ENGINEERING.
650	2	4	_aMECHANICAL ENGINEERING.
650	2	4	_aASTRONOMY, OBSERVATIONS AND TECHNIQUES.
710	2		_aSpringerLink (Online service)
773	0		_tSpringer eBooks
776	0	8	_iPrinted edition: _z9780387787923
830		0	_aMechanical Engineering Series, _x0941-5122
856	4	0	_uhttp://dx.doi.org/10.1007/978-0-387-78793-0 _zVer el texto completo en las instalaciones del CICY
912			_aZDB-2-ENG
942			_2ddc _cER
999			_c59110 _d59110