1 Introduction
2 Control system analysis at high altitude
3 Design of the lag-lead emendation network
3.1 Emendation unit analysis for the original system
3.2 Bode diagram design of the lag-lead emendation
3.2.1 Design requirement for emendation network
3.2.2 Procedure for emendation network design
3.2.3 Calculate the parameters of the emendation network
% Open-loop gain
K = 1/1.65; % Lag emendation unit
wc = 12; beta = 8.5;
T = 1/(0.1*wc); betat = beta*T; Gc1 = tf([T 1],[betat 1]) |
% Lead emendation unit den1 = conv([1 0 0 0],[1 1.93 121.13]); den2 = conv([7.083 1],[0.05 1]); den = conv(den1,den2); num = conv([0 4714.7],[0.8333 1]); sope = tf(num,den); gama = 50;wc = 12; [Gc] = leadc(1,sope,[gama]) |
3.2.4 Bode diagram check in frequency domain
den1 = conv([1 0 0 0],[1 1.93 121.13]); den2 = conv([0.05 1],[7.083 1]); den3 = conv(den2,[0.1225 1]); den = conv(den1,den3); num = 23.11.*[127.98 84.66 150.91 3.31]; G = tf(num,den); bode(G) margin(G) [Gm,pm,Wg,Wp] = margin(G) |