首先来个简单% N0 B0 v/ {/ O5 b C, t
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>> syms t r a b q . n. U- \8 | i4 R
>> x=r*cos(t)+a;& m$ @- }0 E/ ?9 g) \
>> y=r*sin(t)+b;# }2 h1 K; G* j( X. {
>> X=-x*cos(q)-y*sin(q);
- s' M1 Q" t( ~) U) I>> simplify(X)
: x" L, g9 c+ l" W7 Q5 Q
+ V/ t( U0 P1 c: rans =
* L8 v7 ^5 y y/ Z) g9 L
1 O" o. D" W" d7 l& x. x- u; F- f- a*cos(q) - b*sin(q) - r*cos(q - t)
+ @ z& @" s) c5 A* b
; R" M F2 h: s K1 l( ]1 \复杂点 就不化简了
- Z( B! E5 P5 p+ |$ O$ _- g& J% F >> syms t r a b k q A
! j& E- X) Y# b: ^# S: b2 I" x8 w>> x=r*cos(t)+a;
2 ?9 r' V3 e7 { t! f# ~- F$ Z>> y=r*sin(t)+b;
3 e8 E; W, j+ ?3 Q* R) }! F>> N=[-cos(k*q) -sin(k*q) cos(q);-sin(k*q) cos(k*q) sin(q)];+ ^8 n! N5 g! P4 Y" S2 V
>> M=[x;y;A];" ]* Y+ S$ }5 N( O) F& T i
>> NM=N*M
& j% K+ A6 H& [- E, E1 u* r ! p% ~" X" Z- j8 \% L! w8 Y; `
NM =
" a: r( H* H( M6 E
9 ^2 J0 h' I: ?/ m) Y A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t))/ ?1 ]& J: [2 O# w4 v& S5 P
cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q)
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8 @ @6 P* v( E' ]1 M$ s& H>> x1=A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t));) N" e: P2 Y- I7 a% [9 M5 ^
>> simplify(x1)
- M I3 Y/ ]4 L0 k
$ [4 @( F8 j2 y$ D7 Q9 P- tans =
4 U5 B& \/ ?- H 9 e* i+ m: p1 a$ S" r
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 ( B+ ^$ `. d& @* `2 `
' c! Y! ?6 w2 x) K( q
A*cos(q) - a*cos(k*q) - b*sin(k*q)-r*cos(k*q-t); `5 L4 [ w( m3 O. \
6 _. b, y7 ?# h5 _>> y1=cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q);. P8 y' K* ^9 C/ g7 X# _+ e ?
>> simplify(y1)
$ U$ U+ W* n9 d
, F/ I) q' w+ q+ m8 wans =
$ D( V2 q9 r+ y& a1 R/ ]' f , G& a) I6 X! N! b: j
cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q)
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