Search found 12 matches

by Boran.Zhao
Wed Jun 12, 2019 9:08 am
Forum: Computer-Aided Engineering Software Tools
Topic: Does linearization provides wave disturbance matrix in the latest FAST?
Replies: 10
Views: 1535

Re: Does linearization provides wave disturbance matrix in the latest FAST?

Dear Dr. Jonkman,

Thank you very much for your further explanation.

Best
Boran
by Boran.Zhao
Mon Jun 10, 2019 10:04 am
Forum: Computer-Aided Engineering Software Tools
Topic: Does linearization provides wave disturbance matrix in the latest FAST?
Replies: 10
Views: 1535

Re: Does linearization provides wave disturbance matrix in the latest FAST?

Dear Dr. Jonkman, Thank you very much for your quick response. I look forward to the function of wave disturbance matrix generation to be released. Do you have a rough estimate of when the release will happen? I have another question. I previously used FAST 7 to simulate the NREL 5MW baseline turbin...
by Boran.Zhao
Sun Jun 09, 2019 4:52 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Does linearization provides wave disturbance matrix in the latest FAST?
Replies: 10
Views: 1535

Does linearization provides wave disturbance matrix in the latest FAST?

Hello, I am currently working on control of the NREL 5MW baseline turbine on a semi-submersible platform. I want to use FAST linearization to get a linearized model for controller design: dx_dot = A dx + B u + Bv v + Bw w, (1) where v and w are wind and wave disturbances, respectively. As far as I k...
by Boran.Zhao
Thu Jan 03, 2019 10:38 am
Forum: Computer-Aided Engineering Software Tools
Topic: Pitch to stall mode for controlling the NREL 5MW reference turbine
Replies: 6
Views: 912

Re: Pitch to stall mode for controlling the NREL 5MW reference turbine

Thanks for your quick reply. Really appreciate your patient help!

Best Regards
Boran
by Boran.Zhao
Thu Jan 03, 2019 8:37 am
Forum: Computer-Aided Engineering Software Tools
Topic: Pitch to stall mode for controlling the NREL 5MW reference turbine
Replies: 6
Views: 912

Re: Pitch to stall mode for controlling the NREL 5MW reference turbine

Dear Dr. Jonkman, Thanks again for your clarification. I found the modified airfoil data files in the post you provided. Here I wonder whether those files are exclusively for stall mode or they can also be used for feather mode as well. This concern is related to whether I need to switch between dif...
by Boran.Zhao
Wed Jan 02, 2019 8:04 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Pitch to stall mode for controlling the NREL 5MW reference turbine
Replies: 6
Views: 912

Re: Pitch to stall mode for controlling the NREL 5MW reference turbine

Dear Dr. Jonkman, Thank you very much for your quick response. I have another question. In Page 9, Section II. B of the paper you listed above, there is the following paragraph. Before pursuing the design of the pitch-to-stall controller, I decided to smooth the airfoil-data coefficients (as present...
by Boran.Zhao
Tue Jan 01, 2019 8:50 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Pitch to stall mode for controlling the NREL 5MW reference turbine
Replies: 6
Views: 912

Pitch to stall mode for controlling the NREL 5MW reference turbine

Dear Dr. Jonkman, I am working on designing and implementing a (Hinf or gain-scheduled) feedback controller for the NREL 5MW baseline turbine (described in [1]) on a semi-submersible platform. Currently, I focus on regulating both the generator speed and the platform motion in Region III. I understa...
by Boran.Zhao
Sat Feb 17, 2018 6:00 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine
Replies: 8
Views: 1409

Re: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine

Dear Dr. Jonkman,

Thanks very much for your further clarification and suggestion. Look forward to seeing the function of linearizing floating offshore wind turbines in FAST v8 and OpenFast.

Best,
Boran
by Boran.Zhao
Fri Feb 16, 2018 12:24 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine
Replies: 8
Views: 1409

Re: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine

Dear Dr. Jonkman, Thanks for your further clarification. Good to know that FAST v7 can be used to linearize offshore wind turbines. In that case, I still want to try linearize the OC4-DeepCwind SemiSubmersible (OC4 for short) in FAST v7. However, the standard test cases under the folder CertTest in ...
by Boran.Zhao
Thu Feb 15, 2018 12:46 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine
Replies: 8
Views: 1409

Re: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine

Dear Dr. Jonkman,

Thanks for your further reply. I just want to double check one more thing. When you say "While FAST v7 can be used to linearize floating offshore wind models", does it mean that FAST v7 can be used to linearize floating offshore wind turbine?

Regards
Boran
by Boran.Zhao
Wed Feb 14, 2018 6:35 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine
Replies: 8
Views: 1409

Re: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine

Dear Dr. Jonkman, Thanks very much for your quick reply. To answer your question, I got the files from one colleague in UBC Control Engineering Lab, who customized the fst file for OC4-DeepCwind semisubmersible under the direction of Dr. Alan Wright (I guess) at NREL. We can successfully run the sim...
by Boran.Zhao
Wed Feb 14, 2018 2:26 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine
Replies: 8
Views: 1409

Linearization of the NREL 5MW-OC4-DeepCwind SemiSubmersible wind turbine

Dear Dr. Jonkman, I am now working on control of the NREL 5 MW - OC4- DeepCwind SemiSubmersible wind turbine. I was wondering whether I can obtain a linearized model for this wind turbine including the semi-submersible platform at different wind speed conditions in FAST. I tried this in FAST v7.02.0...

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