question on simulation of a CTSDM with SCR feedbacks

soupdawn

I'M working on a system simulation of a CTSDM with SCR feedbacks,the picture uploaded shows the simulink model,scope1 and scope3 show the half Ts delayed exponential slopes with different time constants,the s function is used to generate a pluse whose level changed at Ts,the simulation step is 0.01,and Ts=1.
" h/ x! ?3 ?3 [$ _3 F$ Ibut the simulation result is not right,i need help.