本帖最后由 shouce 于 2015-12-9 23:18 编辑 ( G2 i, U$ v" h% F g
# T, g; ?9 u2 e) G- A) e2 }% i阴圆弧推阳包络线 >> syms r t a b k q i A
) B+ ^) K7 Y; n% Z>> x2=r*cos(t)+a;y2=r*sin(t)+b;/ d9 z4 t" r9 a/ u
>> x1=-x2*cos(k*q)-y2*sin(k*q)+A*cos(q);) A& z6 q6 ~) V8 ?$ T7 F6 m
>> y1=-x2*sin(k*q)+y2*cos(k*q)+A*sin(q);; [% L: k% A8 W, U) v
>> simplify(diff(x1,t))
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ans =
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2 Q9 Z3 o/ ?/ R& Br*sin(t - k*q)4 B/ L6 Y! [( a) `
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>> simplify(diff(y1,t))
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r*cos(t - k*q)
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>> simplify(diff(x1,q))& o0 b" C4 p( Z1 w5 E- B) y# H' v
, m' }7 ?' y: J/ a$ xans =# a: Z l% A' `8 E
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k*sin(k*q)*(a + r*cos(t)) - A*sin(q) - k*cos(k*q)*(b + r*sin(t))
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3 p# t- C8 K3 n>> simplify(diff(y1,q))& ?7 Q1 I3 ~3 [7 w! W3 ]
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ans =( ^( T. K5 a8 p# D' w) `) S( _8 s% [7 y
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A*cos(q) - k*cos(k*q)*(a + r*cos(t)) - k*sin(k*q)*(b + r*sin(t))
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>> f=sym('(r*sin(t - k*q))*(A*cos(q) - k*cos(k*q)*(a + r*cos(t)) - k*sin(k*q)*(b + r*sin(t)))-r*cos(t - k*q)*(k*sin(k*q)*(a + r*cos(t)) - A*sin(q) - k*cos(k*q)*(b + r*sin(t)))') 7 L1 M: S9 w- U1 e9 V* B! C
2 a! k. P* o6 R+ V5 q7 @! R B>> simplify(f)
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ans =
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A*r*sin(q + t - k*q) + b*k*r*cos(t) - a*k*r*sin(t)
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f1=sym('A*r*sin(q + t - k*q) + b*k*r*cos(t) - a*k*r*sin(t)=0')
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>> pretty(solve(f1,q)). h: i" t# ^1 R" `# _
/ / b k cos(t) - a k sin(t) \ \2 l5 c3 ]( @, [3 a8 b0 i
| t + asin| ----------------------- | |
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| ----------------------------------- |
, I/ R0 ]0 |0 N! @0 i, v" \| k - 1 |) ]1 L1 [9 Q g* U: N
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(t + asin((k*(b*cos(t) - a*sin(t)))/A))/i; j; G% W* b$ m1 h4 j
& b* |( l# z: G* J% M阳圆弧推导 阴转子包络线 t + asin((k*(b*cos(t) - a*sin(t))/(A*i))- L* ~/ s) j. F9 E: V B$ S9 {5 B
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