Question

此刻，我很困惑，建议在开发代码时遇到一些缺陷。我正在尝试实现一个函数，该函数可计算出以下角度和距离（距离=观察者到刀片的距离），如图所示：这些值是转子的一个叶片部分的值。最终目标是具有一种功能，该功能需要转子的观察者位置和轮毂位置，然后为转子叶片的一整圈旋转计算所有段的所有角度和距离。下面是我想出的代码。如果我的代码正确与否，如果有人可以给我任何提示，那将是极大的帮助！顺便说一句，有没有更容易/更快的方法？提前非常感谢！

clc
clear all 
close all

% Number of rotation increments
userInput.azNum = 8;  
% Number of blade segments                                                      
userInput.segNum = 20;   

% Airfoil chords per segment
userInput.c = [0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121 0.121];

% Airfoil's radial distance per segment
userInput.distRad = [0.440;0.520;0.600;0.680;0.760;0.840;0.920;1;1.08;1.16;1.24;1.32;1.40;1.48;1.56;1.64;1.72;1.80;1.88;1.96]';

% Observer position
userInput.xObsG = 0;
userInput.yObsG = 0;
userInput.zObsG = 0;

% Rotorhub position
userInput.xRothubG = 0;
userInput.yRothubG = 0;
userInput.zRothubG = 2;

% Intialise vectors
userInput.r = zeros(userInput.segNum,userInput.azNum);
userInput.phi = zeros(userInput.segNum,userInput.azNum);
userInput.theta = zeros(userInput.segNum,userInput.azNum);

% Compute angles for a complete revolution and get the distance to each
% trailing edge segment and the needed angles
for i =1:1:userInput.azNum
    userInput.psi(i) = i*2*pi/userInput.azNum;
    [~,userInput.r(:,i),userInput.phi(:,i),userInput.theta(:,i)] = ...
        DirectComp(userInput.xObsG,userInput.yObsG,userInput.zObsG,userInput.xRothubG,userInput.yRothubG,userInput.zRothubG,userInput.c,userInput.distRad,userInput.psi(i));
end

% Plot results
figure(30)
subplot(3,1,1)
plot(rad2deg(userInput.psi),userInput.r,'*-')
subplot(3,1,2)
plot(rad2deg(userInput.psi),rad2deg(userInput.theta),'*-')
subplot(3,1,3)
plot(rad2deg(userInput.psi),rad2deg(userInput.phi),'*-')

% Actual function
function [r,r_norm,phi,theta] = DirectComp(xObsG,yObsG,zObsG,xRothubG,yRothubG,zRothubG,chord,distRad,psi)

            for d = 1:1:length(distRad)                

                % Observer vector in global coordinate system
                observerVector_global = [xObsG,yObsG,zObsG];

                % Hub vector in global coordinate system
                hubVector_global = [xRothubG,yRothubG,zRothubG];

                % Observer vector in hub coordinate system
                observerVector_hub = -observerVector_global + hubVector_global;                

                % Blade vector at psi = 0 in hub coordinate system
                bladeVectorStart_hub = [chord(d)/2, distRad(d),observerVector_global(3)];

                % x vector at beta = 0, in hub coordinate system
                xStart_hub = [0,1,0];                 

                % Blade and x vector in function of beta
                v1 = bladeVectorStart_hub(1)*cos(psi) - bladeVectorStart_hub(2)*sin(psi);
                v2 = bladeVectorStart_hub(1)*sin(psi) + bladeVectorStart_hub(2)*cos(psi);
                v3 = bladeVectorStart_hub(3);

                x1 = xStart_hub(1)*cos(psi) - xStart_hub(2)*sin(psi);
                x2 = xStart_hub(1)*sin(psi) + xStart_hub(2)*cos(psi);
                x3 = xStart_hub(3);

                x = [x1,x2,x3];
                bladeVector_hub = [v1,v2,v3];

                % Vector from blade to observer in hub coordinate system
                r(d,:) = observerVector_hub - bladeVector_hub;

                r_norm(d) = norm(r(d,:));

                % theta
                theta(d) = atan2(norm(cross(r(d,:),x)), dot(r(d,:),x))';

                % phi
                n = cross(r(d,:),x); % vector perpendicular to r and x

                z = [0,0,1];

                phi(d) = atan2(norm(cross(z,n)), dot(z,n))';

            end

end

计算转子叶片的角度和距离

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