Trouble with DASSL, Wind turbine simulation 
Trouble with DASSL, Wind turbine simulation 
f.perrone 
Mar 17 2011, 12:19 PM
Post
#1

Newbie Group: Members Posts: 9 Joined: 14March 11 Member No.: 266,812 
Hello everyone,
please enclosed you might find the script of my whole work in order to simulate the behavior of a 3 bladed horizontal axis wind turbine. When I attempt to simulate the model this error command appears: Logfile of program ./dymosim (generated: Thu Mar 17 13:11:53 2011) dymosim started Model: HAWT_750KW ... "dsin.txt" loading (dymosim input file) ... "HAWT_750KW.mat" creating (simulation result file) Integration started at T = 0 using integration method DASSL (DAE multistep solver (dassl/dasslrt of Petzold modified by Dynasim)) ... Error message from dymosim At time T = 7.832031e002 and stepsize H = 2.373564e015 the code had repeated error test failures on the last attempted step. A singularity in the solution may be present. (For DAEs: Provide initial values of X and of XD which are consistent). Integration will be terminated. Integration terminated before reaching "StopTime" at T = 0.0783 CPUtime for integration : 0.567 seconds CPUtime for one GRID interval: 3.61 milliseconds Number of result points : 157 Number of GRID points : 158 Number of (successful) steps : 375 Number of Fevaluations : 3510 Number of Jacobianevaluations: 76 Number of (model) time events : 0 Number of (U) time events : 0 Number of state events : 0 Number of step events : 0 Minimum integration stepsize : 5e007 Maximum integration stepsize : 0.000436 Maximum integration order : 5 Calling terminal section ... "dsfinal.txt" creating (final states) Is there anyone able to help me? I thank you in advance. Regards, Francesco Edit: I worked it out by means of the Radau solver; Attached File(s) HAWT_750KW.txt ( 11.93k ) Number of downloads: 623 
LoFi Version  Time is now: 21st March 2019  07:42 AM 