Ok, thanks so much for answering. quinta-feira, 4 de Agosto de 2016 às 00:57:12 UTC+1, Jason Moore escreveu: > > Nuno, > > Simplification of very large expressions is typically not a good idea due > to the time needed for computation. Unless you have a specific need to > simplify the resulting equations, I'd avoid it. > > > Jason > moorepants.info > +01 530-601-9791 > > On Tue, Aug 2, 2016 at 5:25 PM, Nuno <nmi...@gmail.com <javascript:>> > wrote: > >> I have created a jupyter notebook where I'm defining a multibody system >> in order to obtain its kinematics and dynamics. >> >> I use the KanesMethod (from sympy) in order to obtain the equations of >> motion of the system. >> >> >> However when I try to use trigsimp() on the mass matrix obtained, it >> seems to get stuck there forever (displaying an 'In[*]' next to that line). >> >> >> The line is: 'mass_matrix = trigsimp(kane.mass_matrix)' >> >> Here's a screenshot:https://gyazo.com/8c6ac6cefd87b889a4ed8f9a9c3077d9 >> >> (The python process is using ~30% of the processor) >> >> >> The matrix is a 6x6 matrix, but some of the elements have lot's of >> trignometric functions since there are 3 reference frames with 3D rotations >> in order to each other. >> >> >> So what's happening? I have no experience with sympy, so I'm a little >> lost. >> >> (I'm sorry if this is a duplicate, but I couldn't find my first publish >> and I wanted to add more info) >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sympy+un...@googlegroups.com <javascript:>. >> To post to this group, send email to sy...@googlegroups.com <javascript:> >> . >> Visit this group at https://groups.google.com/group/sympy. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/0f1d7a62-4f2e-473d-8a44-fe6aaf403f22%40googlegroups.com >> >> <https://groups.google.com/d/msgid/sympy/0f1d7a62-4f2e-473d-8a44-fe6aaf403f22%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > >
-- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/acd36b6a-47d3-4e27-a4b3-578c785e2c80%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
