文档介绍：“per(k^xlureforoptiinal(-iatic;,theoptimalvaluesofsomeparametersoftheleadingfour-barmechanismarefoundinordertoensurethe(k^iralmotionofthesupportwithlnininialtraiiswr・sal(,maximaltolerancesoftheoptimalvaluesoftheleadingfour-alculated,sotherc^-barmeclianism<optimaldesigntmath ematicalprograwuiing,approximationmethod,lian-;?used,,it(le|x?n(-r;()describedbyHarl(1998)je- -l);(・mureprecisely,,isverticalwithminimaltransversaldisplacements*Ifthisisnotthecase,thehydraulicsupportwillnotworkproperlybwaiiseitisstnuidedonrcino^(Gnn1992).Thesupportexhibitedlargetr;msvcrsjil(-・-sible・Itwasdecidedtofindthelotminesforthemostproblematicpaiaincters ofthelcaxlingfour-bai*liodsofinatlieinaticalj)ro->iil(llx?necessarytochangetheproject,liaiiisniAEDB・Thesolutionofaboveproblemwillgive11sthere-)cditferentlx?causcoftolerancesofvari ousparametersofthesystem,whichiswhythenuiximalallowedtol