首先来个简单9 T0 L5 \& @' L8 q: e
* r$ b l5 x. h7 g
>> syms t r a b q
* U0 `0 k/ k, S1 l% u; y>> x=r*cos(t)+a;$ D! I0 z4 D# F/ o% g) |
>> y=r*sin(t)+b;
9 z0 g* F% i( L$ _>> X=-x*cos(q)-y*sin(q);+ b L, R+ G* E
>> simplify(X), R+ R j! c8 }" i* O
4 c! P5 \8 c2 m$ p; C9 I6 J, E9 L
ans =' Z: \% e* ~: f
1 }& l: W5 @' b0 m1 ]8 n- a*cos(q) - b*sin(q) - r*cos(q - t) 3 j$ B. e, ?, M
# {" Z; K* t1 y复杂点 就不化简了+ {2 K# j: l1 S* ^& a
>> syms t r a b k q A+ [0 k3 a8 b" x Y* ^
>> x=r*cos(t)+a;1 t3 B3 _ g* q; {, I
>> y=r*sin(t)+b;, R# F6 ~+ ~7 g3 ^; n
>> N=[-cos(k*q) -sin(k*q) cos(q);-sin(k*q) cos(k*q) sin(q)];
+ U0 a* C4 U+ @>> M=[x;y;A];
( T2 E% j2 Z: J# {% y' v8 _>> NM=N*M
5 \' \ M& u; o1 q5 z
) g$ b ^ Y% n5 l7 mNM =
4 q+ M2 Q6 t- v+ V2 n. j9 [: T ( B- [2 ]0 E6 k i: j; Y* ?
A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t))
; o+ b4 h" b# I$ K cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q)9 C9 x+ L7 P3 m2 q- @& X
9 U( U% y+ f) o- l
>> x1=A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t));" e5 W& z2 e" ~$ z# H% D
>> simplify(x1). _! b/ e( g# X& r; S' ]0 T9 U
. n) V$ h( e) Q3 [( S' m% u2 Z
ans =
$ N! M. c3 @, f# e* N # P0 [! j4 \) K3 m5 j/ Q/ `# ^
A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t)) 化简无效果 按正常应该是
D3 M* D+ c! l. R- |8 M: d
f5 W! }: ^5 R- b. u( WA*cos(q) - a*cos(k*q) - b*sin(k*q)-r*cos(k*q-t)5 M, ]7 p+ z' r& j
6 F8 K# i l: G
>> y1=cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q);5 S0 h8 a4 b+ Z; E
>> simplify(y1)
2 O; G% D" s/ g# W( N0 N: R9 N* W # c5 v8 k* s% p' z: ^$ }2 U/ f" E2 d
ans =
- H+ G1 G$ U6 R5 F' K
5 N) T; Q- C( y/ ]cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q)
0 C' u/ A% \1 x; _7 E
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