LG.m文件:
function y = LG( params, rho, phi )m = abs(params(1))
p = params(2)
w = params(3)
t = rho./w
y = sqrt(2*factorial(p)/pi/factorial(m+p)) / w ...
.* (sqrt(2)*t).^m ...
.* L([p m], 2*t.^2) ...
.* exp(-t.^2 + 1i*m*phi)
function y = L(params, x)
fact = @(x)arrayfun(@factorial, x)
n = params(1)
k = params(2)
m = 0:n
a = factorial(n+k)*ones(1,length(m))
b = fact(n-m)
c = fact(k+m)
d = fact(m)
e = (-1).^m
y = zeros(size(x))
for s = 1:n+1
y = y + a(s) ./ b(s) ./ c(s) ./ d(s) .* e(s) .* x.^m(s)
end
end
end
主敏搭雀程序:
clear allclose all clc
[X, Y] = meshgrid(linspace(-4, 4, 100))
Rho = sqrt(X.^2 + Y.^2)
Phi = atan(Y./X)
params = [0 0 1]
Z = LG([0 0 1], Rho, Phi)
surf(X, Y, Z)
shading interp
% 你没告诉我u怎么设置
u = @(rho, phi)exp(-rho.^2) % 待修改
a = @(n, rho)quadv(@(phi)u(rho, phi)*exp(-1i*n*phi), 0, 2*pi)/sqrt(2*pi)
C = @(n)quadgk(@(rho)a(n, rho).^2.*rho, 0, inf)
t = -20:20
Cs = arrayfun(C, 枝誉t)
P = Cs/sum(Cs)
P = P(t>=-10 &桥早 t<=10)
plot(-10:10, P, 'o-')
一种举磨态量化的方式,轨道不平顺的正源测量是以几种弦长来进行的,比如10m弦、20m弦、30m弦、70m弦、300m弦等,也就是楼主说的波长,每种波长有对应的轨道不平顺允许偏差,在一定范围内,短波长游中的偏差对于低速行车影响较大欢迎分享,转载请注明来源:内存溢出
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