Dr. Suresh Reddy: Engineering Leader in Control Theory & Applications

Control Systems Theory & Applications

Nonlinear and linear control theory, Industrial and manufacturing process control, Active noise control, Control software development

Injection molding machines: GE-Fanuc control improvements

Polycarbonate sheet extrusion: GE process control (sheet ripple reduction concepts)

GE Aircraft Engine Turbine blades: Metal spray forming process control concepts

GE Reflector bulb manufacturing: silver stripping process control concepts

Relevant Experience at GE, MIT, Ohio State:

Vehicle control systems at GE and Caterpillar Inc (link)

Control of electric/hybrid powertrains and charging systems at GE, Caterpillar Inc and Fronius USA (link)

Control of electric power generation systems and microgrids at Caterpillar Inc & microgrids (link)

Manufacturing process control:

• spray forming control concepts for aircraft engine turbine blades

• GE Lexan™ polycarbonate sheet ripple reduction/ elimination - extrusion rolls control concepts (GE)

• multivariable nonlinear control design of a new process for silver stripping (GE)

• injection molding process control improvements, simulations, and control rapid prototyping (GE)

Noise control/reduction:

• simulation of active control designs for exterior and interior noise of turboprop aircraft (GE)

Nonlinear control theory and applications:

• Theory for nonlinear controls for systems with unknown dynamics (Time Delay Control), PID control for nonlinear systems (MIT & post-MIT)

• Control of active magnetic bearings - implementation of Time Delay Control and comparison to linear analog compensator (MIT)

• Control of active magnetic bearings - stability analysis and simulation of various nonlinear control systems(MIT)

• Time Delay Control stability analysis for robotic manipulators (MIT)

• Computer Aided control system design for nonlinear systems to avoid limit cycles, jump resonances and subharmonic oscillations (Ohio State)

Turboprop aircraft (OV-10A) : Active Noise Control Simulation

[Separate links for Control of Powertrains/Charging Systems; Control of vehicle systems; Control of power systems ]

Areas of Experience and Expertise

• Linear and nonlinear control systems - analysis and design

• Analysis and design of control systems with delay

• Computer aided control system design for nonlinear systems

• Control of magnetic bearings, robotic manipulators

• Industrial/chemical/manufacturing process control

• Active noise control

• Vehicle control systems (link)

• Control of electric/hybrid powertrains and charging systems (link)

• Control of electric power generation systems & microgrids (link)

• Modeling and simulation of systems and control

• Model based software development

• Software In the Loop/Hardware In the Loop (HIL)/Power HIL verification/validation

Key R&D Experience (at GE, MIT, Ohio State)

Turbomolecular Pump: Control of Active Magnetic Bearings

Robotic Manipulators (Control Analysis)

Images of industries and products used are illustrative of Dr Reddy's research and development in various companies - they are meant to be illustrative, but not necessarily identical

Sources of images of products:

Polycarbonate extrusion process - exceliteplas.com.au (illustrative); Polycarbonate sheets: acmeplastics.com (illustrative); Sheet rolling process control illustration - US Patent 6,250,904; Injection Molding machine - Wikipedia commons (illustrative); Injection molding control illustration - US Patent 6,430,466; GE aircraft engine and turbine blades - wikipedia; Spray forming process diagram - powdermetallurgy.com; Reflector light bulb - GE lighting website; OV-10A aircraft - NARA & DVIDS public domain archive; Turboprop active noise controller diagram - IEEE Conference publication; Turbomolecular pump - MIT work/photo under Ebara grant/permission; Rotor under magnetic bearings diagram - M.I.T. Ph.D. Thesis; robot manipulator - researchgate

Relevant Patent Grants

1. US12463428B2 "Systems and Methods for Multiple Energy Storage System Dispatch", Caterpillar Inc, Granted: Nov 4, 2025; Filed: Oct 4, 2023

2. US12431712B2 “Systems and Methods for Control of Distributed Energy Resources”, Caterpillar Inc, Granted: Sept 30, 2025; Filed: Sept 9, 2022

3. US11962156B2 “Systems And Methods For Constrained Optimization Of A Hybrid Power System That Accounts For Asset Maintenance And Degradation”, Caterpillar Inc, Granted: April 16, 2024; Filed: Aug 19, 2021

4. US11936184B2 “Systems And Methods For Operating Hybrid Power System By Combining Prospective And Real-Time Optimizations”, Caterpillar Inc, Granted: March 19, 2024; Filed: Aug 19, 2021

5. US11451085B2 “Fuel Cell and Battery Backup Power Sources within Power Systems”, Caterpillar Inc, Granted: Sept 20, 2022; Filed: Aug 31, 2020

6. US11404986B2 “Torque Control Based on Rotor Resistance Modeling in Induction Motors”, Caterpillar Inc, Granted: August 2, 2022; Filed: Aug 14, 2020

7. US11384629B2 “Systems and Methods for Driving a Pump using an Electric Motor”, Caterpillar Inc, Granted: July 12, 2022; Filed: Nov 30, 2020

8. US12060877B2 “Hydraulic Fracturing Pump Control System”, Caterpillar Inc, Granted: Aug 13, 2024; Filed: Sept 18, 2020

9. US11188045B2 “Energy Management System with genset and energy storage”, Caterpillar Inc, Granted: Nov 30, 2021; Filed: March 18, 2019

10. US10998732B2 “System and Method for Diverse Multi-Source Energy Management”, Caterpillar Inc, Granted: May 4, 2021; Filed: March 20, 2019

11. US86263682 “Electric drive power response management system and method”, Caterpillar Inc, Granted: Jan 7, 2014; Filed: Sept 7, 2010

12. US8482238B2 “System and method for estimating generator rotor temperature in an electric drive machine”, Caterpillar Inc, Granted: July 9, 2013; Filed: Nov 30, 2010

13. US7918296B2 “Cooling system for an electric drive machine and method”, Caterpillar Inc, Granted: April 5, 2011; Filed: Sept 15, 2008

14. US7467619B2 “Apparatus and method for accurate detection of locomotive fuel injection pump solenoid closure”, General Electric Company, Granted: Dec 23, 2008; Filed: Sept 24, 2007

15. US7328690B2 “Apparatus and method for accurate detection of locomotive fuel injection pump solenoid closure”, General Electric Company, Granted: Feb 12, 2008; Filed: July 16, 2004

16. US7000598B2 “Bumpless crankshaft position sensing”, General Electric Company, Granted: Feb 21, 2006; Filed: May 27, 2004

17. US6507789B1 “Gear transmission condition monitoring method and apparatus”, General Electric Company, Granted: Jan 14, 2003; Filed: July 18, 2000

18. US6208097B1 “Traction vehicle adhesion control system without ground speed measurement”, General Electric Company, Granted: Mar 27, 2001; Filed: Dec 6, 1999

19. US6430466B1 “System for controlling clamp pressure in an automatic molding machine”, General Electric Company, Granted: Aug 6, 2002; Filed: Aug 23, 1999

20. US6250904B1 “Closed loop control of roll speeds in plastics sheet extrusion”, General Electric Company, Granted: June 26, 2001; Filed: Feb 22, 1999

21. US6449564B1 “Apparatus and method for monitoring shaft cracking or incipient pinion slip in a geared system”, General Electric Company, Granted: Sept 10, 2002; Filed: Nov 23, 1998

Relevant Academic Publications

1. American Control Conference, “Approximate Stability Conditions for Systems with Input Delay and Digital PI/PID Controller of Time Delay Control Form”, American Control Conference, May 2021

2. ASME Dynamic Systems and Control Conference, “New Analysis/Design of Generalized Discrete PI Controller via Discrete Time Delay Control for Nonlinear Systems”, Oct 2020

3. ASME Dynamic Systems and Control Conference, “New Stability Analysis and Design of Discrete Time Delay Control for Nonaffine Nonlinear Systems”, Oct 2020

4. American Control Conference, “New Stability Conditions for Time Delay Control of Nonlinear Systems”, July 2020

5. IEEE Conference on Control Applications,, “Phase Locked Loop Control of Turboprop Aircraft Engines for Cancellation of Interior or Exterior Noise”, Sept 1995

6. Journal of ASME Dynamic Systems, Measurement, and Control, “Analysis of linear time invariant systems with time delay”, 1992

7. Journal of ASME Dynamic Systems, Measurement, and Control, “Dynamic analysis and control of high speed and high precision active magnetic bearings”, 1992

8. ASME Winter Annual Meeting, “Stability analysis of time delay control with application to high speed magnetic bearings”, 1990

9. Second International Symposium on Magnetic Bearings, “A Digital Time Delay Controller for Active Magnetic Bearings”, 1990

10. IEEE Control System Magazine, “Computer-Aided Design and Analysis for a Class of Nonlinear Systems”, 1990

Relevant Patent Publications

1. US20250206176, “Electrified Machine and Charger Fleet and Microgrid Power Dispatch”, Pub June 19, 2025; Patent filed: Dec 13, 2023

2. US20250202235, “Structure for Computationally Efficient Optimization for Real Time Microgrid Dispatch”, Pub June 26, 2025; Patent filed: Dec 21, 2023

3. US20250125630, “Systems and Methods for Microgrid Asset Dispatch”, Pub April 17, 2025, Patent filed: Oct 17, 2023

4. US20250070595 , “Method and System for Configuring an Electrical Grid”, Pub Feb 27, 2025, Patent filed: Aug 21, 2023

5. WO2024054743, “Distributed micro-grid control system with a plurality of controllers connected to each other in a peer-to-peer network”, Pub March 2024, Filed: Aug 15, 2023

6. US20240405313 “Thermal management of Battery Systems”, Pub Dec 5, 2024, patent filed May 30, 2023

7. DE102021121927, “Power sources for a fuel cell and for power failure protection in power supply systems”, Patent pub Mar 3, 2022, Filed: Aug 24, 2021

Relevant Individual Awards

MIT - Research (sponsored by Ebara, NSF) & Teaching Associate awards (1989-1992)

Ohio State - University Fellowship award, Research & Teaching Associate awards (1986-88)