P11565: ITT Mirror Steering System

Generate Product Concepts

The following page demonstrates the approach our team took in selecting the best design concept we generated.

Step 1. Clarify The Problem

The system design was divided into two main components: the actuators that create a force to move the mirror, and a type of mounting device that allows the mirror to flex into position. We will need to design or purchase actuators that can generate enough force to tilt the mirror to the desired position. It will also be necessary to design the mounting device to have a certain spring constant, k, that will allow the pivot component to flex enough with respect to this amount of force.

Step 2. Search Externally

Our group performed research on similar devices that are commercially available. The most common actuators used are voice coils and piezoelectric. For each type, there are several different layouts that could be selected for this project. For the mechanical structure, various designs also exist. The designs we selected to focus on include a flexure hinged mount, a dual-ring system, and a lever arm that tilts the mirror into position.

The following image is an idea for the block layout of our project. This was created based off our external research.

Block Diagram of Project

Block Diagram of Project

Step 3. Generate Concepts

Based on the designs our group thought were potential solutions for our problem, several concepts were generated. Some ideas were eliminated right away however. For example, after speaking with the customer, it was determined that piezoelectric actuators were to be avoided. Other factors such as power consumption, hysteresis, and frictional effects eliminated additional designs.

A document of our remaining concepts can be seen below. A total of 3 voice coils and 3 mounting devices must now be considered for our final design. The next step to choosing our final design is to create a concept selection matrix, which can be viewed on the "Select Product Concepts" page.

Design Concepts