P07110 Vertical Test Stand. Concept Review

Transcription

1 P07110 Vertical Test Stand Concept Review

2 Last year, a Senior Design team designed and built a horizontal rocket test stand. Many useful lessons were learned from this effort and there exists the potential for improvement with this design. We have been given the task to improve upon the current horizontal stand and data acquisition system, as well as the challenge to design and build a vertical test stand. Some problems that have been encountered: The data acquisition system is extremely time consuming to set up The calibration and rail systems do not work as efficiently as they could and need to The orientation of the rocket does have an effect on its performance, so a vertical test stand is essential

3 We went to a closed linear bearing for better support We performed analysis to verify that the rails would not deflect too much ¾ rails are sufficient The current rod connecting the rocket and load cell is susceptible to buckling Using a thin-walled structural shape would solve this problem (i.e. If a 1 x1 x thick aluminum square section is used, the maximum length for a 200lb f load is 130.) Data Acquisition system will be more efficient and easy to use Ignition system will be controlled by three simple switches

4 Temperature readings at the fuel grain are necessary for other METEOR teams The plan is insert K thermocouple wires between the steel rocket body and the fuel grain Temperatures within this region are not expected to be beyond the limits of these thermocouples

5 Vertical Thrust Reading Lateral Force Plume Removal Option for Roll Movement Acceleration Readings on Rocket Body Rocket must be restrained safely Pressure & Temperature Readings Simple Set Up Need Amplifiers for Sensors Plug & Go Data Acquisition System/Terminal Blocks

6 Rails on Rails Ethan2 Orthogonal Frame

7 Ball-Bearing Tube Axis Pivot

8 Single Cantilever Double Cantilever Gimbal

9 ! Concepts for Vertical Stand A B C D E F G H I Ethan1 Ethan2 Brian1 Brian2 Brian3 Kevin1 Kevin2 Kevin3 Mike1 (Benchmark) Rails on Rails Orthagonal Frame Axis Pivot Ball-Bearing Tube Single Cantilever Gimbel Dual Cantilever Selection Criteria Rating Rating Rating Rating Rating Rating Rating Rating Rating Axial Force Measurement Lateral Forces Plume Removal Safety Ease of Construction/Use Torsional Force Ability to be Modified for Different Rocket Sizes Cost Sum +'s Sum 0's Sum -'s Total Score Rank Continue? No Yes Yes No No Combine No Combine Revise

10 "! Gimbal & Tube Combination Thrust Bearing Cone

11 # B C Concepts for Vertical Stand FH I AA E2 Orthagonal Frame Gimbal with Tube Dual Cantilever Thrust Bearing Cone Selection Criteria Weight Rating Weighted Rating Weighted Rating Weighted Rating Weighted Rating Weighted Score Axial Force Measurement 15% Lateral Forces 15% Plume Removal 5% Safety 25% Ease of Construction 5% Ease of Use 5% Torsional Force 15% Ability to be Modified for Different Rocket Sizes 10% Cost 5% Total Score Continue? 2.45 Score Rank Score Score 0.30 No No Yes No Yes Score 0.5

12 $ % &!

13 $ % &#

14 $ % &# '

15 %( )% Battery Packs Amplifier and Power Regulator Circuits Inside The Box Sensor Plugs Power Switches RS232 Faceplate Sensor Power Future Sensor Plugs Sensor Plugs Op-Amp Power Future RS232 RS232

16 (% Input from Load Cell Output to A/D Converter

17 ) Oxidizer Ignition Purge 12 V 12 V 12 V Power for Purge and Oxidizer solenoids Power for Ignition RL Circuit for Ignition

18 * Data Aqusition Sensors Test Stand Structure Item Notes Budgeted Cost Electrical Plugs and Connectors Connects sensors on horizontal and vertical stands to DAQ. $50.00 Custom PCB Boards Connects sensors on horizontal and vertical stands to DAQ. $ x USB or Serial DAQ Units Interface between the test stand sensors and the computer(s). $ x Older Laptop Computer(s) Reads data from the DAQs. Hope to get these donated if possible. $1, Misc. Electrical Components Restistors, capacitors, inductors, and ICs used in the DAQ circuits. $ lbf Load Cell Already have this item from last year. $ x 25 lbf Load Cells Needed for lateral force measurements. $2, K Type Thermocouple Wire For temperature mearsurements on the rocket body. $60.00 Thermocouple Amplifiers / Junctions Transforms the thermocouple signals into something readable by DAQ. $ Pressure Sensors METEOR project already has these. $0.00 Rails / Bearings for Horizontal Stand Materials to improve horizontal test stand for more testing. $ Universal Joint Provides freedom of motion in the vertical test stand. $ Bearings Reduces friction in the movement of vertical test stand. $ Shaft Coupling Provides the capability to test with or without roll capability. $ Metal Stock Needed to build the structure of final test stand. $1, Metal Cutting Tools Cutting tools the ME machine shop does not have but are needed. $75.00 Total: $6,415.00

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