首先来个简单
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9 F3 T7 _/ `( E" \3 v>> syms t r a b q
+ ? y7 G# C8 \) j! T+ {: C>> x=r*cos(t)+a;' a9 }, t, {( w' L& m
>> y=r*sin(t)+b;) ?1 B' W4 q3 L9 R H
>> X=-x*cos(q)-y*sin(q);2 y$ D$ Y5 W- o) K
>> simplify(X)" |* u4 T2 K B) p- ~
4 ]7 x O' L- C9 wans =" y* _ ~7 z$ r s$ C/ F% H
4 F/ l8 d! D' \' c/ C- a*cos(q) - b*sin(q) - r*cos(q - t)
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复杂点 就不化简了
* |6 f0 o4 f. {$ T, h >> syms t r a b k q A
! T m* v! T+ a4 w) a. v>> x=r*cos(t)+a;1 \9 V5 r5 Q; E; E$ G
>> y=r*sin(t)+b;6 l6 Q6 B2 Z+ J. K% d
>> N=[-cos(k*q) -sin(k*q) cos(q);-sin(k*q) cos(k*q) sin(q)];, c9 w/ F0 ^1 f
>> M=[x;y;A];
$ I' @+ Q" A% {' J>> NM=N*M: x7 J# _+ G/ P( b& r C
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NM =
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: g; h! b: T2 Z& l! q0 {- L A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t)): t: |5 s4 V! b- E1 E D
cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q)- ^9 a! F0 C* G% O" |
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>> x1=A*cos(q) - cos(k*q)*(a + r*cos(t)) - sin(k*q)*(b + r*sin(t));
. ]: S/ a3 Q# W! _1 p( w5 P4 ]( U>> simplify(x1)4 t f/ o$ a0 S7 _* L1 o
5 d3 H3 z; l0 b2 {ans =4 Y/ _- w2 E3 r A( x
2 R$ J! _1 g, `( ]6 U
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 0 w: m$ R' @% O7 {
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A*cos(q) - a*cos(k*q) - b*sin(k*q)-r*cos(k*q-t)
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; w+ G& G- l9 v7 B2 O>> y1=cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q);
+ V- P- Q- W7 [; C>> simplify(y1); w- R7 m- K7 ]7 o2 P2 D9 K9 E
2 S. v) [9 Z4 B, q, Z
ans =
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cos(k*q)*(b + r*sin(t)) - sin(k*q)*(a + r*cos(t)) + A*sin(q)
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