4、sitiondetectionisdirectlyaffectstheperformanceoftheservosystem.TheresolutionofSin-Cosencodercanbeimprovedbysubdividingtheangle,sinceitsoutputsignal isanalogsignal.Inthispaper,wedesignthedecodesystembaseontheTMS320F2812DSPchipofTIcompany.Atthesametime,weusetheMultisimsoftwaretosimulatethedecode c