Lecture notes on aerodynamics

 

Animation of pole movement for mechanical rotor, gyroscopic effect

 

Animation of components of Active magnetic bearing supported flywheel

 

Animation of thrust AMB operation

Thrust magnetic bearing single axis, operation

 

Animation of the radial AMB operation

 

Radial active magnetic bearing operation 

Animation of pole movement of rigid rotor, showing precession, nutation and cylindrical modes

Movement of poles showing nutation, precession, cylindrical modes. Nutation and precession change with RPM

 

Animation of poles and zeros movements of unstable rigid rotor on AMB, with RPM

Movement of poles and zeros with RPM unstable AMB rotor

 

Animation of the pole movements of the unstable rigid rotor on AMB active magnetic bearings

Precession, Nutation and cylinder mode poles traveling on the S plane with increase in RPM

 

Animation of rigid body modes of a flywheel rotor

Nutation, forward whirl, Frequency decreases with RPM, damping is low, difficult to control as frequency is high.

Precession, backward whirl, reduces damping with RPM, frequency reduces with RPM, have to be actively controlled.

Pendulous mode, cylinder mode, does not depend on RPM, no gyroscopic effect, no tilting of disc

Pendulous mode, cylinder mode, does not depend on RPM, no gyroscopic effect, no tilting of disc

 

LQR study notes for Christopher Lum lecture, youtube

 

Contacts from Electronica India 2025, September 18 and Aero india

 

Kid friendly game sites

1. https://pbskids.org/games/engineering
2. SafeKidGames.com
3. gameforge.com Crazy Machines (2005)
4. Fantastic Contraption (2008) Miniplay.com, Kongregate 
5. The Incredible Machine (1993) Classicreload.com

IIT Palakkad facilities

1.  EOS laser 3D priting machine build volume 250 x 250 x 300 mm
2. Wire melt based machine
3. Techsol instruments supplies gas handling systems
4. ISOTECH environmental chambers
5. ARUN RAHUL is faculty incharge, does research on control alogorithms of PMSM motor using F28379D TI microcontroller
6. Rotordynamics laboratory equipment are from GUNT, German company and TQinstruments: Tecquipment

High speed motors for 30,000 RPM, 15 kW power

 E+A:

OEM name: E+A

Motor type: SYM - IPM, which i guess stands for interior permanent magnet synchronous machine, with a water cooled two pole arrangement.

Motor number: mSipW 8.5/11-6-s3r2

Balancing machine for high speed motor:

https://www.aeroexpo.online/aeronautic-manufacturer/aeronautic-balancing-machine-3081.html

IMT Classic 120 VM1

https://www.imt.de/en/products/details/classic-120-vm1-10621120

GMN spindle motor:

https://www.gmn.de/en/spindles/spindle-groups/workpiece-spindles/

Linear actuator for 18mm per min speed, 100mm stroke, 10N pull force

RS380 motor 3.6V DC brushed motor re-winding for higher torque

Disassembly of existing motor from Black and Decker drill gun: