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MATLAB: PID controller

Written by Paul Cracknell

Updated at February 21st, 2025

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Example MATLAB script to implement the PID Controller (plotting)

Example MATLAB script to implement the PID Controller (plotting)

%% Plotting PID Controller Example
% %  This example demonstrates how you can configure the PID Controller instrument, %  and view triggered time-voltage data frames in real-time. % %  (c) 2021 Liquid Instruments Pty. Ltd. % % Connect to your Moku and deploy the PID controller instrument i = MokuPIDController('192.168.###.###'); try         %% Configure the PID controller     % Configure the control matrix     i.set_control_matrix(1,1,0);     i.set_control_matrix(2,0,1);     % Enable all input and output channels     i.enable_input(1,true);     i.enable_input(2,true);     i.enable_output(1,true,true);     i.enable_output(2,true,true);         % Configure controller 1 by gain     i.set_by_gain(1,'prop_gain',10, 'diff_gain',-5,'diff_corner',5e3 );     % Configure controller 2 by frequency     i.set_by_frequency(2, 'prop_gain', -5, 'int_crossover',100, 'int_saturation',10);             % Place 2 monitor points, one at input 1, one at output 1     i.set_monitor(1,'Input1');     i.set_monitor(2,'Output1');     % Configure the timebase to -2 ms and 2 ms     i.set_timebase(-0.002,0.002);         % Configure the trigger     i.set_trigger('type',"Edge", 'source',"ProbeA", 'level',0);         %% Set up plots     % Get initial data to set up plots     data = i.get_data();         % Set up the plots     figure     lh = plot(data.time, data.ch1, data.time, data.ch2);     xlabel(gca,'Time (sec)')     ylabel(gca,'Amplitude (V)')     grid on     grid(gca,'minor')     %% Receive and plot new data frames     while 1         data = i.get_data();         set(lh(1),'XData',data.time,'YData',data.ch1);         set(lh(2),'XData',data.time,'YData',data.ch2);         axis tight         pause(0.1)     end catch ME     % End the current connection session with your Moku     i.relinquish_ownership();     rethrow(ME) end i.relinquish_ownership();
moku:lab control system

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