23 lines
931 B
Matlab
23 lines
931 B
Matlab
function [Cb2n_312, Cb2n_321] = eul2m(att)
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% 将欧拉角转换为姿态阵
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% 复用严龚敏老师的a2mat
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%
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% Input: att 单位：rad
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% 对于312((Z->X->Y))顺序，对应att = [pitch(绕X轴) roll(绕Y轴) yaw(绕Z轴)]
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% 对于3211(Z->Y->X)顺序，对应att = [roll(绕X轴) pitch(绕Y轴) yaw(绕Z轴)]
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% Outputs:
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% Cb2n_312: 312欧拉角顺序下转换后的Cb2n
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% Cb2n_321: 321欧拉角顺序下转换后的Cb2n
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s = sin(att); c = cos(att);
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si = s(1); sj = s(2); sk = s(3);
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ci = c(1); cj = c(2); ck = c(3);
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Cb2n_312 = [ cj*ck-si*sj*sk, -ci*sk, sj*ck+si*cj*sk;
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cj*sk+si*sj*ck, ci*ck, sj*sk-si*cj*ck;
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-ci*sj, si, ci*cj ];
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if nargout==2 % dual Euler angle DCM
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Cb2n_321 = [ cj*ck, si*sj*ck-ci*sk, ci*sj*ck+si*sk;
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cj*sk, si*sj*sk+ci*ck, ci*sj*sk-si*ck;
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-sj, si*cj, ci*cj ];
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end
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