Structural and Mechanical Conceptual Design for QUBIC Mount · Define the main structure...

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.



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.


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



Particular Mount Requirements: ??

Frequency requirements Environment data. Operative and Non Operative conditions Others.



Conceptual Design: Overview

1st Arm (Optical axis rotation and

elevation)

2nd Arm (Azimuth

rotation)Base

QUBIC



Conceptual Design: 1st Arm

Metal Sheets

(Structural Steel)



Conceptual Design: 1st Arm – optical Axis Rotation


Driver motor

Curved Guide


Concept Design: 2nd Arm

Metal Sheets

(Structural Steel)

Truss Structure

(Structural Steel)



Concept Design: 2st Arm – Elevation movement



Concept Design: 2st Arm – Azimuth movement

Azimuth servomotor



Drive SystemSystem description for the three axes

Servomotor PulleyGear unit Synchronous

Belt

ShaftResolver

External Encoder

Servomotor with gearbox

Type: asinchronous.

Electromagnétic brake.

Absolut encoder.



Synchronous Belt

Drive System

Servo motor

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: ?


Structural and Mechanical Conceptual Design for QUBIC Mount · Define the main structure...

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Transcript of Structural and Mechanical Conceptual Design for QUBIC Mount · Define the main structure...