abb-control-systems

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    變信號我想創建信號r(t),使得: r(t) = 1.......0<t<=30 sec r(t) = -(1/16)*(t-30)+1 ...... 30 to 34 sec r(t) = 0.75 ..... 34 to 50 sec r(t) = +(1/16)*(t-54)+1......50 to 54 sec r(t) = 1 ....54 to 60 sec Signal