This paper presents some numerical examples concerning the pantograph equation y'(t) = ay(t) -t by(qt) for different values of the parameters a, b, q, satisfying the conditions Ial + b < 0, 0 < 1 -q << 1. "Naive" interpretation of these examples could lead to wrong conclusion on the asymptotic behav
The control of the motion of a pantograph
β Scribed by Y. Yavin
- Book ID
- 104351689
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 606 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0895-7177
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β¦ Synopsis
Thii work deals with the modelling and control of the motion of a constrained multibody system which is a flexible version of a pantograph. The system is corn-of four uniform links, two torque actuated joints and three passive joints. All the links are moving in the horizontal plane, see Figure 1. In the case of a pantograph, the joint pg is attached to the point ~4. See [l] for the description and equations of motion of a pantograph. Given two configurations A and B of the system, and a time interval [O,tf]. The problem dealt with in thii work is to compute the control torques for each of the actuated joints such that the system will move during [O,t,] from configuration A to configuration B subject to various constraints on the motion.
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The general focus of this aerodynamic noise research, induced by turbulent incompressible #ow, is to improve our knowledge of acoustic production mechanisms in the TGV pantograph recess in order to be able to reduce the radiated noise. This work is performed under contract with SNCF as a part of the
Finite element and boundary element calculations are combined to predict the flow noise radiated from a 1/10thscale model of an aerodynamic cover used around the pantograph on a train at 250 km h ΓΏ1 . The solutions of the unsteady air flow over the cover and the resulting sound propagation are divid