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1. Position control study
The subject is approached through a simplified approach to the calculation of a position servo with mechanical input and translational output (cylinder). This approach provides information on the response speed of the servo system, but does not allow us to predict the instability often encountered in practice.
The same servo is then studied again, taking into account the fluid's compressibility, using the classical linear method (Laplace transform); this method provides us with stability conditions. The results obtained are then extended to electrohydraulic and rotary motor position feedback.
The next two paragraphs are devoted to studying the influence of interface parameters (such as anchor stiffness) and component non-linearities (such as servo valve threshold), which are at the root of most of the tuning difficulties encountered in practice....
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Position control study
Study of force feedback
Bibliography
Organizations
France
Bureau de normalisation de l'aéronautique et de l'espace (BNAE) http://www.bnae.asso.fr
Centre technique des industries mécaniques (Cetim) http://www.cetim.fr
Comité de normalisation des moyens de production (Cnomo)...
Standardization
French Standards Association (Afnor)
- Transmissions hydrauliques et pneumatiques. Symboles graphiques et schémas de circuits. Partie 1 : symboles graphiques. - NF ISO 1219-1 - Mars 1992
- —. —. Part 2: circuit diagrams. - NF ISO 1219-2 - Juin 1998
- Aéronautique et espace. Pompes hydrauliques à débit variable régulé...
Recommendations
Comité de normalisation des moyens de production (Cnomo) (French standardization committee for production equipment)
- Transmissions hydrauliques. Règles générales relatives aux systèmes. Sélection et complément de ISO 4413:1998. - E 05.01.135.N - Juin 2001
- Réservoirs hydrauliques. About et raccord de remplissage et...
Builders, manufacturers, suppliers
This list is not exhaustive.
Accesso Ferm http://www.accesso-ferm.fr
ACHP http://www.achp.fr
...
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