Non-recursive augmented Lagrangian algorithms for the forward and inverse dynamics of constrained flexible multibodies

A technique is presented for solving the inverse dynamics of flexible planar multibody systems. This technique yields the non-causal joint efforts (inverse dynamics) as well as the internal states (inverse kinematics) that produce a prescribed nominal trajectory of the end effector. A non-recursive global Lagrangian approach is used in formulating the equations for motion as well as in solving the inverse dynamics equations. Contrary to the recursive method previously presented, the proposed method solves the inverse problem in a systematic and direct manner for both open-chain as well as closed-chain configurations. Numerical simulation shows that the proposed procedure provides an excellent tracking of the desired end effector trajectory

Stress stiffening and dynamic stress computation in flexible multibody dynamics : formulation

http://deepblue.lib.umich.edu/bitstream/2027.42/6186/5/bac7157.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/6186/4/bac7157.0001.001.tx

Evaluation of bushing dissipation rates and component flexibility in the dynamic analysis of the DN101 lower control arm mounted on nonlinear elastic bushings

http://deepblue.lib.umich.edu/bitstream/2027.42/6185/5/bac7473.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/6185/4/bac7473.0001.001.tx

A nonlinear viscoelastic bushing element in multibody dynamics

http://deepblue.lib.umich.edu/bitstream/2027.42/6187/5/bac7168.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/6187/4/bac7168.0001.001.tx

Glide symmetry applied to printed common-mode rejection filters

In this article, we present a novel application of glide symmetry to differential lines with common-mode (CM) rejection filter properties. Two different topologies are investigated. First, glide symmetry is applied to a pair of differential lines where ground-connected mushrooms are employed as a CM rejection structure. The same idea is also used in a pair of differential lines where defective ground structures are introduced to stop the CM propagation. It is demonstrated that the CM rejection bandwidth is drastically increased when glide symmetry is exploited in both topologies when compared with their corresponding structures without glide symmetry. Furthermore, we show that the differential-mode propagation is hardly affected by the use of glide symmetry, ensuring the good integrity of the transmitted information. Experimental demonstration for both mushroom and defected ground structure is provided. Good agreement between simulations and measurements results is observed