nlmpc, Error using sqpInterface Nonlinear constraint function is undefined at initial point. Fmincon cannot continue. How to fix it? Help me, please, I can give you all that you want (Script,State function and so on)

6 次查看（过去 30 天）
Vincenzo Russo
Vincenzo Russo 2020-7-21
评论： ahmed sayed 2024-7-31
The error that appear, after first launch is:
Start of Error Report ------------------------------------------------------ Error using sqpInterface Nonlinear constraint function is undefined at initial point. Fmincon cannot continue. Error in fmincon (line 843) [X,FVAL,EXITFLAG,OUTPUT,LAMBDA,GRAD,HESSIAN] = sqpInterface(funfcn,X,full(A),full(B),full(Aeq),full(Beq), ... Error in nlmpc/nlmpcmove (line 157) [z, cost, ExitFlag, Out] = fmincon(CostFcn, z0, A, B, [], [], zLB, zUB, ConFcn, fminconOpt); Error in nmpcblock_interface (line 159) [mv, ~, Info] = nlmpcmove(nlobj, x, lastmv, ref, md, Options); ------------------------------------------------------ End of Error Report ------------------------------------------------------
Error occurred when calling NLP solver "fmincon". See the error report displayed above. Error in nmpcblock_interface.m (line 161) throw(ME) Error in 'HEAVYTRUCK_linearMPC/Nonlinear_MPC_Controller/MPC/NLMPC' (line 24)
Component:Simulink | Category:Model error
An error occurred while running the simulation and the simulation was terminated
Caused by:
  • Simulation stopped because of a runtime error.
I don't know how fix it, I traied more things for to fix its, but... no results!
  7 个评论
显示 5更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

George
George 2023-11-1
Hi all,
I had the same error arrise when I was attempting to create a NMPC for a hypersonic longitudinal model. To fix the issue I had found a bug in the aerodynamic data where a value was off by a factor of 10 (one decimal place to the right). Upon fixing this, the model worked correctly.
I'm not sure why exactly this would throw this error, but this could be the root cause, an error in the dynamics of the system.

类别

在 Help Center 和 File Exchange 中查找有关 Model Predictive Control Toolbox 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by