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Trajectory Generation 

Engineering Educator Academy
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Different methods of generating parametric trajectories (joint variables as a function of time) for path planning in robotics applications is explained in this video, including polynomials (cubic and quintic), trapezoidal-velocity profile and s-curve (seven segment).

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30 июл 2024

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Комментарии : 34   
@srenh-p3798
@srenh-p3798 Год назад
Very informative. I really liked how you qualified the difference between path planning and trajectory generation by giving the context of physical limitations on acceleration and torque.
@anshumansharma6758
@anshumansharma6758 2 года назад
Best descriptive explanation for S Curve. Thanks very much.
@ayaz8767
@ayaz8767 5 месяцев назад
Professor, Quite informative video. Thanks for your effort to share this clean,precise explanations. Matlab codes also much more supportive. Best wishes
@eliascorrea220
@eliascorrea220 2 года назад
Nice video, it was very clear the explanation. Thank you to share it.
@jannisbruns3677
@jannisbruns3677 Год назад
thank you very much for the explanation, very well done and understandable, it helped me a lot!
@zuhairomer9501
@zuhairomer9501 Год назад
Thanks a lot for this high value videos
@nghiakhac6530
@nghiakhac6530 2 года назад
Many thanks, It help my problem !
@AdnanAhmad-wo5jo
@AdnanAhmad-wo5jo Год назад
Good explanation
@AbdulRahman-jz3px
@AbdulRahman-jz3px Год назад
Thank you for the excellent explanation, this video really helped me understand the course material. I want to ask, can these methods be applied to a simple robot arm using a microcontroller like Arduino? if yes can you give me an idea.
@CAPTIS-3D
@CAPTIS-3D 2 года назад
Great video, great explanation and the equations really works well
@mehran1384
@mehran1384 2 года назад
Thanks. Happy that you found the video helpful. Please share this channel with your friends.
@CAPTIS-3D
@CAPTIS-3D 2 года назад
@@mehran1384 Can you share me the Matlab code?
@CAPTIS-3D
@CAPTIS-3D 2 года назад
I am having some problems with the S-curve planning, I don't get to create the q position correctly.
@mahnazandalibi3962
@mahnazandalibi3962 2 года назад
Thanks
@hollowthetop
@hollowthetop Год назад
@@CAPTIS-3D check again q1,..q7 matlab equations. They are in function of t not t1 or t2,3,4,5,6,7.
@ltd5480
@ltd5480 22 дня назад
How can I interpolate this on 2 axis for them to end at the same time?
@sgtstrolch
@sgtstrolch Год назад
Did you also solve to calculate the final time like you did in 53:14 under using the quintic polynom? Great video btw!
@asmaalahrechguendouz2447
@asmaalahrechguendouz2447 2 месяца назад
Thank you for the video, is the speed profile generated in this video valid for an autonomous vehicle testing or is it only for robotics ( angles) ?
@arulrajarulraj1671
@arulrajarulraj1671 4 месяца назад
Which trajectory planning technique and algorithms employed in robotics???
@user-fs5my7fi7t
@user-fs5my7fi7t 9 месяцев назад
Hello, sir. If I want to execute this in Simulink, how can I convert it? I would like to add PID motor position control after the S-curve.
@asmaalahrechguendouz2447
@asmaalahrechguendouz2447 2 месяца назад
hello, you can take you input i suppose the speed and add a line in your code V = timeseries(v', t'); and then go to Simulink and add a "from workspace" box and add your V (v is the vector calculated in the algorithm, and t is the time )
@user-ic6ot6tt9d
@user-ic6ot6tt9d 4 месяца назад
Hello Sir, This is a very informative video on s curve trajectory. I am using this to control the motion of a linear drive of a cartesian robot but I am having an issue with the MATLAB script when I try to generate the same trajectory. If it is possible for you can you share the script code, I would be very thankful. Also, is it possible to generate this specific type of trajectory in Simulink. Thanks.
@engineer6194
@engineer6194 Год назад
Can you tell me the source book you used?
@anghelblas
@anghelblas 8 месяцев назад
You can read this book: Trajectory Planning for Automatic Machines and Robots
@rezah336
@rezah336 4 месяца назад
at 22:58 the q-vector elements are in the wrong order
@mehran1384
@mehran1384 4 месяца назад
Thanks. I will check it.
@kevinkipkorir3132
@kevinkipkorir3132 Год назад
Hello sir, I am having trouble writing code for the seven segment, could you please send the code so I can counter check.
@kevinkipkorir3132
@kevinkipkorir3132 Год назад
solved it, It was an issue with BODMAS
@srinivasulu.vardhineni
@srinivasulu.vardhineni Год назад
@@kevinkipkorir3132 Can you please share code for seven segment profile?
@kevinkipkorir3132
@kevinkipkorir3132 Год назад
I will do it as soon as I settle down
@srinivasulu.vardhineni
@srinivasulu.vardhineni Год назад
@@kevinkipkorir3132 I just typed. It is working. Thank you for reply. Are you a researcher?
@kevinkipkorir3132
@kevinkipkorir3132 Год назад
Yes, the work we are doing is really writing software for a robotic arm we are working on.
@keeratiubolmart5207
@keeratiubolmart5207 Год назад
Hi, sir could i have your sheet please 😅
@adnanshakoor2340
@adnanshakoor2340 6 месяцев назад
corrected code %% Quintic Polynomial clear all; t0=0.5; tf=1.5; qt0=0; qtf=20; qdott0=0; qdottf=0; q2dott0=0; q2dottf=0; %%n=16; %%IL=0.2; %%IM=0.005; %%Ieq=IM+IL/(n^2); A=[1 t0 t0^2 t0^3 t0^4 t0^5;... 0 1 2*t0 3*t0^2 4*t0^3 5*t0^4;... 0 0 2 6*t0 12*t0^2 20*t0^3;... 1 tf tf^2 tf^3 tf^4 tf^5;... 0 1 2*tf 3*tf^2 4*tf^3 5*tf^4;... 0 0 2 6*tf 12*tf^2 20*tf^3]; RHS=[qt0;qdott0;q2dott0;qtf;qdottf;q2dottf]; coeffs=inv(A)*RHS; t=linspace(t0,tf,200); q=coeffs(6)*t.^5+coeffs(5)*t.^4+coeffs(4)*t.^3+... coeffs(3)*t.^2+coeffs(2)*t+coeffs(1); qdot=5*coeffs(6)*t.^4+4*coeffs(5)*t.^3+... 3*coeffs(4)*t.^2+2*coeffs(3)*t+coeffs(2); q2dot=20*coeffs(6)*t.^3+12*coeffs(5)*t.^2+6*coeffs(4)*t+2*coeffs(3); %%omega_max=max(abs(qdot))*30/pi; %%T_max=Ieq*max(abs(q2dot)); %%fprintf('using quintic polynomial, the maximum angular velocity is %4.2f rpms ',omega_max); %%fprintf('using quintic polynomial, the maximum torque is %4.2f N-ms ',T_max); figure(2); subplot(3,1,1); plot(t,q); xlabel('t(sec)'); ylabel('q(t) (rad)'); title('Quintic Polynomial'); subplot(3,1,2); plot(t,qdot); xlabel('t (sec)'); ylabel('dq/dt(t) (rad/s)'); subplot(3,1,3); plot(t,q2dot); xlabel('t (sec)'); ylabel('d^{2}q/dt^{2}(t) (rad/s^{2})');
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