力单 设t=0时,q=40,q=o代入上两式得: A=19+ q a= arc ctg 0 或 q=C, coS@n t+Casin@nt C1,C2由初始条件决定为C1=qo,C2=qon g=go cos@nttsin nt9 0 0 2 2 2 0 0 , arctg q q q A q n n = + = 设 t = 0 时, q = q0 , q = q 0 代入上两式得: 或: q C t C t n n = 1 cos + 2 sin C1,C2由初始条件决定为 q n C1 =q0 , C2 = 0 / t q q q t n n n cos sin 0 0 = +