DIGITAL HYDRAULIC ACTUATOR STUDY.
Abstract
The progress is reported on the Digital Hydraulic Actuator (DHA) Study as related to a Polaris application. The purpose of the DHA Phase I Study is to establish and define the pertinent parameters which impact control system performance with Polaris as a study vehicle. If the DHA can be shown to provide suitable performance characteristics as a substitute for a continuous elec tro-hydraulic actuator servo there are some compelling reasons for considering it in many aerospace applications. These reasons include greater mechanical and electrical simplicity, elimination of D/A conversion in systems emitting digital steering commands, and performance of autopilot functions in the central data processor. Two basic study techniques have been employed; one for the purpose of establishing the stability margins as functions of sampling rate and the other for evaluating non-linear device effects in the time domain. In order to study stability margins as a function of sampling rate it has been necessary to generate a perturbed missile model at maximum q the most difficult control point. This is for the purpose of being conservative in DHA requirements evaluation in Polaris. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 08, 1964
- Accession Number
- AD0355158
Entities
Organizations
- International Business Machines Corporation (Armonk, NY)