Structural and Mechanical Conceptual Design forQUBIC Mount
Pablo Ringegni, Luis Mariano Mundo
UID - GEMA Aeronautics DepartmentSchool of Engineering
Universidad Nacional de La PlataArgentina
IAR Meeting Apr 12 - 2016
QUBIC QU Bolometric Interferometer for Cosmology
Topics
1. Introduction
2. Mount Requirements
3. Conceptual design
4. Future Works
P Ringegni, M. Mundo School Of Engineering - UNLP
QUBIC Mount conceptual Design
Introduction: The Conceptual Design of the Qubic Mount
Instrument Weight: 700 Kg. Instrument diameter: 1600 mm. Instrument height (Included forebaffle): 1800 mm. Three rotation axes: azimuth, elevation and the optical axis.
P Ringegni, M. Mundo School Of Engineering - UNLP
QUBIC Mount conceptual Design
Mount Requirements:( All the requirements must be checked and confirmed)
Mount dimension shall not exceed a diameter of 2500 mm and a height of 2500 mm.
Mass of the mount shall not exceed 2300 kg. The mount shall be able to rotate the instrument around the
azimuth, elevation and optical axis simultaneously. The mount shall have a pointing accuracy better or equal to 20
arc seconds in all axis of rotation.
P Ringegni, M. Mundo School Of Engineering - UNLP
Mount Requirements:
Angular Displacements: Azimuth between -220° and +220°. Elevation between +30° and +70° (zenith is
at +90° and horizon at 0°) Optical axis between -30° and +30°
Angular Velocities: It should be adjustable between 0°/s and 5°/s with steps no larger than 0.2 °/s for all axis of rotation.
Environment temperature -85°C to -25°C Operational temperature -30°C to 0°C
Azimuth
Elevation
Optical Axis
QUBIC Mount conceptual Design
P Ringegni, M. Mundo School Of Engineering - UNLP
Particular Mount Requirements: ??
Frequency requirements Environment data. Operative and Non Operative conditions Others.
QUBIC Mount conceptual Design
P Ringegni, M. Mundo School Of Engineering - UNLP
Conceptual Design: Overview
1st Arm (Optical axis rotation and
elevation)
2nd Arm (Azimuth
rotation)Base
QUBIC
QUBIC Mount conceptual Design
P Ringegni, M. Mundo School Of Engineering - UNLP
Conceptual Design: 1st Arm
Metal Sheets
(Structural Steel)
QUBIC Mount conceptual Design
P Ringegni, M. Mundo School Of Engineering - UNLP
Conceptual Design: 1st Arm – optical Axis Rotation
QUBIC Mount conceptual Design
Driver motor
Curved Guide
P Ringegni, M. Mundo School Of Engineering - UNLP
Concept Design: 2nd Arm
Metal Sheets
(Structural Steel)
Truss Structure
(Structural Steel)
P Ringegni, M. Mundo School Of Engineering - UNLP
QUBIC Mount conceptual Design
Concept Design: 2st Arm – Elevation movement
P Ringegni, M. Mundo School Of Engineering - UNLP
QUBIC Mount conceptual Design
Concept Design: 2st Arm – Azimuth movement
Azimuth servomotor
P Ringegni, M. Mundo School Of Engineering - UNLP
QUBIC Mount conceptual Design
Drive SystemSystem description for the three axes
Servomotor PulleyGear unit Synchronous
Belt
ShaftResolver
External Encoder
Servomotor with gearbox
Type: asinchronous.
Electromagnétic brake.
Absolut encoder.
P Ringegni, M. Mundo School Of Engineering - UNLP
QUBIC Conceptual DesignFuture works: Define the main structure configuration. Define driving system for the three axis rotation. Analyze new requirements compliance. Preliminary structural and mechanical design of main components
acording to those requirements. (Load cases and frequency analisys). Preliminary analysis of systems integrations (electric/mechanical ). Costs Estimation:
Design and analisys Materials for the structure: Driving Mechanisms: Manufacturing: Concrete foundation ? Shiping to site: ? Manpower for instalation on site: ? Tuning: ?
P Ringegni, M. Mundo School Of Engineering - UNLP