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We met with Sean Hinze and Dr. Stearman, over lunch, to discuss the previous work of the Spring 2002 group on the Active Wing Design.
We have decided that Basil Philip is the team leader and is going to obtain the keys to WRW 319, WRW 202, and the LRC.
The following is a tentative division of the project work:
Naoki Sato - Mechanics
David Fuentes - Avionics
Basil Philip - Hydraulics
We also looked over sketches of the wing model and are in the process of choosing which sketches we are going to commit to AutoCAD drawings. |
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Dr. Stearman went out to Austin Hydraulics and discovered that the power supply was still in pieces after six months of promises to get it fixed.
After discussing the matter, it was decided that rather than going through the frustration of putting together the 20 yr old power supply; it would be to our advantage if we began anew and buy a new, modern power supply.
We are currently in the process of finding reference material for a hydraulic control system to aid in understanding the new power supply.
Furthermore, it was decided to scrap the old analog control system and begin work on the digital control system. Dr. Craig is supposed to be here this Friday and he will know where to locate the manuals for the digital control system.
We also reviewed the previous work done on the Active Wing project by the group from the previous semester.
It was decided that the references that they found the Limited Cycle Oscillations, the Active Aeroelastic Wing, and the control reversal is sufficient for our purposes. |
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Preliminary Oral Presentation |
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On Monday we also spoke with Frank Weiss. He told us to type in:
Hydraulic power supply
on the internet to search for a power supply to power the wing model system.
Some of the desired specifications for the power supply is:
・Pressure - 1000psi
・Volumetric Flow Rate - 7.082 cc/s = .007082 Liter/s
The next major steps that we feel that we must accomplish involve:
・Understand and work with the System ID toolbox on Matlab and find a Controls teacher to
work w/ us
・Get the Hydraulic Power Supply Ordered
・Decide what we are going to do about the missing stabilator |
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This week the ethics paper and the CAD project slowed progress on the Active Wing Design project. However, we are looking forward to see if we can use the CAD drawing of the stabilator to build a new stabilator.
On Monday we also spoke with Frank Weiss.
Last week the possibility of scrapping the entire hydraulic system was discussed. The possible replacement is a MSM material device made of Magnetic Shape Memory material.
With the upcoming Midterm Presentation, we are concerned about having enough content for the report. |
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With the upcoming midterm and midterm presentation we have a few questions.
・The control law implementation section in Bolding's Masters Thesis is very hard to follow. The majority of the section it seems as if he is describing how he built the electronics to have the desired transfer function to control the system. Furthermore, understanding the control laws implemented in the master's thesis is beyond the level of what is taught in ASE 370
・According to a EE book that David has, the system that Dr. Craig would be considered an analog system. A digital system uses a computer to control the process. Dr. Craig's system is a PID controller type that utilizes variances in the electronic circuits to implement the desired controller.
・We want to make sure that we can consider the hydraulics system, the pizo-electric system, the electro-mechanical system, and the MSM actuator system as independent ways of powering the wing tail actuator. |
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Midterm Oral Presentaiton |
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Last week was spent on preparing for the Midterm presentation and writing the final reports.
We are meeting with Dr. Juan Senent this week to discuss possible implementation schemes for a digital controllers as well as acquiring the hardware. We will get quotes for power supply systems next week. |
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We have chosen the main topics that we are going to discuss in our final presentation and report:
First of all, we are going to include more background in our final presentation than we did in our midterm presentation. Also, we plan to provide a review of the main topics discussed in our midterm.
Naoki will investigate methods to the increase of maximum lift coefficient of the airplane. His final presentation will focus on presenting the theory developed by the Israeli researchers and implementation schemes relevant to our project.
Basil will work on Cad drawings of active control surface implementation and the implementation of Dr. Craig's equipment into the model. Basil is investigating camshaft designs for oscillation control and gear-crank systems for position control.
David will talk about using an analog controller for wing sweep position control; for this topic Op Amps will be discussed. David will also discuss the controller implementation process as given to us by Dr. Juan Senent:
・Theoretical model
・System ID
・Controller Design
・Implementation |
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