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8、www.sabre.orgPrefaceApproachControlsystemsareanintegralpartofeverydaylifeintoday’ssociety.Theycontrolourappliances,ourentertainmentcenters,ourcars,andourofficeenvi-ronments;theycontrolourindustrialprocessesandourtransportationsystems;theycontrolourexploration
9、ofland,sea,air,andspace.Almostalloftheseappli-cationusedigitalcontrollersimplementedwithcomputers,microprocessors,ordigitalelectronics.Everyelectrical,chemical,ormechanicalengineeringseniororgraduatestudentshouldthereforebefamiliarwiththebasictheoryofdigitalcont
10、rollers.Thistextisdesignedforaseniororcombinedsenior/graduate-levelcourseindigitalcontrolsindepartmentsofmechanical,electrical,orchemicalengineering.Althoughothertext
