7 16
Abslracts
dunng the ldentfficauon expenmenL The snnphc~ty of the algorithm allows xt to be used for on-line medelimg
106 Robustness Study Using a Distance Function E.M. Nebot, A. Desages, pp 477-482 Assuming f(s) be a Hurwtz chamaerumc polynonual, ~t ts mteresung to know the maxtmum vanauon that ~ts c~effic~antcan afford m order to remain smctly stable. This paper considers the problem of finding the maxmmm plato parameter vanauon that makes a gaven controller v~olate a performance criterion Tins criterion ~s based on the prenuse that no clmed-loop pole has to be outsad~ a given reglort. Some regtons of mterest are also presented The method comtders mdepandent confficm~ vanauon Exact and approxnnanon soluuons are presented to de~emuue the worst possible parameter combmauon
107 Parametrization of all Liaear Compmmtors for Discrete. Time Stochastic BiliMar Systems
of mteroonuect~ons among subsystems A decentralLZed control for quadraue stabilization is also given to demonstrate the feas~bdxtyof the dengn
112 Considering Social EHects in Control System Design - A Summary T. Martin, pp 503.508 Apl~ropnate automauon for apphcauon m reahsucany complex soactechmcal dornams should be based on an mtegrated undermmdmg of the techmcal, human, orgamzauonal, ecologacal, econonuc and even culmnd atmbutes It Is the engmeer's responmbthty to amslder the dtrect and md~ect dfects of the automauon technology used Intograt, on as, therefore, a question of balancing different values The ke~, quesuon for man-maclune mtarface, control room and team destsn ts. then, how to support operators so that they can be "m charge" suceassfttUy Innovauve destgn concepts, prmmples and methods are summarized Enonuragmg expanencus show how such approaches lead to better ovend] system performance. Much research remains to be done,
though
Eagin Yaz, R.E. Skeltoa, pp 483.486 For chsorete-ume stochasuc bdmear systems, thus paper presents a charactenzauon of all state ~ovanances assq~nable by linear controller schemes and a pamnemzauon of all controlIen that adueve a desued covananee These resultsmthrealy pmvule the paramemzaUon of all hnear fixed-order compensators wInch are mean-square stabdmng for flus class of systems The paper also includes robumficauen of the derived compensators
108 MultiobJective Control Design Via Linear Matrix Equations E. Yaz, K. Grigorladis, R. Skeiton, pp 487490 Vanous methods are ~pven wInch saudy muluple cnterm for control desagn These methods reduce to linear alsclxmc problems and reqmre the rattsfacuon of certain eTastence con&uons All ccetrollers that wall acineve the desired obFAmves are derived The sets of muhxple objectlvus that are allowed include pole re~on asstsmnent, stmctun~l parameter robustness, H2/I-I~ constramu, and Frobemus Hankel norm constmmu
113 Operator Roles in Advanced Manufacturing Systems L.K. Mtrtenesen, pp 509-512 Handhng unexpected events Is the key funcuon m machine-tool operauon Due to the complexay of the task, flus is a job for the hunum operator, gaven proper training Muslow's theory of human needs formed the bans for a Swe&sh study on the job content of fle~ble manufactunn 8 systems, F M S The superv~tory control model, desagned by Sheridan of MIT, used for automated produeum w~h the five operator roles of planmn~g, programming, momtormg, mtervenmg and learnm 8, Is dealt with m the paper, winch concludes that at ts essenual for the operator to be able to use Ins creauwty m tasks hke planning, programming and dtstmbance bandhn8 114 Automation Without Organizational Development Won't Do. Employee Partidpation in Small to Medium-Sized Eaterprbes Assists in Finding the Successful Derision for the Appropriate Proportion of Automation G. Strina, M. Siithoff, S. Grinda, D. Brandt, pp 513-516 The paper shows some typical pt'oblcms m the atstomm~on approach of small to mechm'n-sszedentclpnses (SMEs) Fonowmg
109 Nonlinear Estlmatloa by Covariance Assignment E Yaz, W. Na Naeara, pp 491494 The onvanance ass~nment methed ~s extended to upper-bonnd assagmnem of eatnnauon error onvanances for nonhnear stoch~uc systems. The charactenzmon of asmgnable bounds, together wgh falter gains that adueve a pamcular assignment, as presented. Exmence condmons and a ~¢urs~ve method of soinuon are 8~ven for the roam destsn equauon 110 Opthnality of Direct Velocity sad Dbplaesment Feedback for Large Spaee Structures with Collocated Semo~ am/ Actuators
M Ikeda, K. KouJitanl, T. Kida, pp 495.498 I)tw~ feedback of veluetty and chsplacement (DVDFB) ts conndered for large space structures (LSS) with collocated sensors and a~_~,~_n It as known that d the n81d modes d LSS are controllable and observable, and the feedback 8ants are nogauve defimte, then the clmed-loop system ~ stable under any permrbauons m mass. damping, and mffness Thus. DVDFB u a robust stab~h~n8 control law The objecuve of tha paper is to show that ff the gains are smtably chosen, then DVDFB ts also oixtmal m the sense of the LQ regulator theory 111 Decontralized Quadratic Stabilization of Intorconnected Systems
K. Yasuda, pp 499-502 In thts paper, the problam of quadraucally stabdszmg a hnear mtercormected system wsth p a r a m e t e r uncenamUeS by decentrahzed control is ccumdered The obtained smbthmbthty condmon Is lpven m terms of quadrauc stainhzablhty with chsturbance attonuauon for each subsystan, and the attenuation values are determmed usmg only the upper bounds of the smmgth
an m~od-,=on to the.pu~dy
f,m,~..t,,oj~ "~,~et Ruhr'. ,t
describes two case stumes xrcm me am ~Jerman moustsy regaon oI the "Ruhregebmt" These examples show how employees can be mtegrated m the design process and how they help to fmd apprcpnate soluuom for antcmauon m SMEs T h e paper ends wlth some concinslom that are to be drawn from these two examples and from smnlar ones
115 Human-Cmtorod Design of Human.Machine Systems and Examples from Air Transport T. Hancke, RJ. Braune, pp 517-$20 Tins paper ¢hscusses the nnportance of apFvopnate deslsn of automation technology. Such deugn is not onented at technology and the vmon of full automauon, winch appears less and less achievable for envLronmonts with a Ingh de~ree of uncertainty Instead, tt puts the empham on the human m the system The paper proposes the human-centered deugn phdmophy as an appropriate apprcech and as ~ of a new parad~n It outhnes t~ origins and development of tlns des~n phdol~phy and Its core prmmples Followmg tlns, the human-centered pinlosophy xs apphed to commercud air transpoa, and Is describedin more detad for flight-deckdeign
116 Automation and Development. The Need of Counting on a New ProJect of Humanity A. Pacheco.EspeJel, J. Arce.Arnez, pp 521-524 The objecuve of tins work ts to Identdy the role that automauon plays m hmnan development Tins objecuve will be accomplished atartm~ from a concept of that development, winch ts based on the defimdon of a human being as a three-pole net of needs and capamues The above leads on to the formulation of the need for a "Humamty ProJect", ooncmved on the basls of a pamcular vlew of automation