Anuradha M Annaswamy

US Patent:

8042483, Oct 25, 2011

Filed:

Sep 18, 2009

Appl. No.:

12/562542

Inventors:

Stephen A. Huyer - Saunderstown RI, US
Daniel L. Macumber - Thornton CO, US
Anuradha Annaswamy - West Newton MA, US
David N. Beal - Providence RI, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

B63G 8/08

US Classification:

114337, 440 66

Abstract:

The invention as disclosed is an apparatus that controls the wake of stator blades on an underwater vehicle. The apparatus comprises one or more stator blades each with a movable trailing edge that when actuated in a controlled manner produces a periodic flapping motion upstream of a propulsion rotor. The controlled periodic flapping of the trailing edge the fills the stator blade wake enough to overcome the stator blade's own drag and fill its wake deficit. This has the effect of reducing the blade rate tonal noise of the propulsion rotor.

US Patent:

20060256080, Nov 16, 2006

Filed:

Mar 17, 2006

Appl. No.:

11/378151

Inventors:

Mandayam Srinivasan - West Newton MA, US
Anuradha Annaswamy - West Newton MA, US
Joono Cheong - Pohang, KR

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G09G 5/00

US Classification:

345156000

Abstract:

Systems, methods and computer-executable code stored on computer readable media for synchronizing the evolving state of a dynamic object in a shared virtual environment among a plurality of geographically separated computers connected in a communications network including data communications links introducing time delays in the propagation of data between said computers. The synchronization scheme utilizes an advanced feedback controller to compensate for the state error between sites, comprised of a linear compensator and a Smith predictor based internal model, to determine correct control forces creating a smooth input while maintaining high levels of responsiveness and consistency. A recovery filter for restoring the natural motion of the virtual object distorted by synchronization control is also described.

US Patent:

20130035885, Feb 7, 2013

Filed:

Jul 26, 2012

Appl. No.:

13/558711

Inventors:

Yoav Sharon - Brighton MA, US
Anuradha Annaswamy - West Newton MA, US
Amit Chakraborty - East Windsor NJ, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA
Siemens Corporation - Iselin NJ

International Classification:

G06F 19/00
G06F 17/50
G01R 21/00

US Classification:

702 61, 703 13

Abstract:

A statistical technique is used to estimate the status of switching devices (such as circuit breakers, isolator switches and fuses) in distribution networks, using scares (i.e., limited or non-redundant) measurements. Using expected values of power consumption, and their variance, the confidence level of identifying the correct topology, or the current status of switching devices, is calculated using any given configuration of real time measurements. Different topologies are then compared in order to select the most likely topology at the prevailing time. The measurements are assumed as normally distributed random variables, and the maximum likelihood principle or a support vector machine is applied.

US Patent:

20210226448, Jul 22, 2021

Filed:

Jun 3, 2019

Appl. No.:

15/734901

Inventors:

- DUBLIN 4, IE
- CAMBRIDGE MA, US
Yigang Wang - Maple Grove MN, US
Damrongrit Piyabongkarn - Plymouth MN, US
Anuradha Annaswamy - West Newton MA, US

International Classification:

H02J 3/16
H02J 3/00
H02J 3/46
G05B 13/02
H02J 3/38

Abstract:

An electrical grid control system includes a number of load tap changers (), a number of voltage regulators (), a number of capacitor banks (), a number of distributed generators (), and a centralized control unit () structured to generate settings information for the load tap changers (), the voltage regulators (), the capacitor banks (), and the distributed generators () based on forecasted data. The distributed generators () are structured to use the settings information and a distributed algorithm to control power provisioning from each of the distributed generators (). The load tap changers (), the voltage regulators (), and the capacitor banks () are structured to adjust their settings based on the settings information and local voltage measurements.

US Patent:

20210056657, Feb 25, 2021

Filed:

Aug 23, 2019

Appl. No.:

16/550037

Inventors:

- Dearborn MI, US
- Cambridge MA, US
Anuradha Annaswamy - West Newton MA, US

Assignee:

Ford Motor Company - Dearborn MI
Massachusetts Institute Of Technology - Cambridge MA

International Classification:

G06Q 50/30
H04W 12/06
G06Q 30/02

Abstract:

A computer-implemented method includes receiving, from a passenger mobile device, a request message indicative of a passenger request for transportation services, determining, based on the request message, an updated estimated wait time (EWT) to accommodate the passenger, determining, based on the first EWT, a probability value indicative of whether the passenger mobile device will send an acceptance of a ride offer for passenger transport, generating, based on the probability value and a reference transportation mode, a price for the ride offer, and sending a proposal message to the passenger mobile device, the proposal message comprising the ride offer, the price for the ride offer, and an itinerary comprising pickup information, and distance information.

US Patent:

20150308523, Oct 29, 2015

Filed:

Apr 25, 2014

Appl. No.:

14/261504

Inventors:

- Dearborn MI, US
DIANA YANAKIEV - Birmingham MI, US
DIMITAR PETROV FILEV - Novi MI, US
YAN WANG - Ann Arbor MI, US
ANURADHA ANNASWAMY - W. Newton MA, US
GREGORY MICHAEL PIETRON - Canton MI, US

Assignee:

FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI

International Classification:

F16D 48/06
F16D 25/06

Abstract:

A hydraulically actuated clutch is controlled based on a mathematical model that predicts the position of the clutch piston based on the profile of the commanded pressure over time. During a clutch engagement, a set of delays associated with the preparatory phase of engagement are measured and compared to predicted values. Model parameters are then adaptively adjusted based on the differences between the measured and predicted delays and on an estimate of the sensitivities between model parameters and the delays. Subsequent engagements are controlled based on the updated mathematical model to reduce the delays. Changes in the measured delays following adaptation of the model parameters are utilized to update the estimate of the sensitivities.

US Patent:

20140224054, Aug 14, 2014

Filed:

Sep 25, 2013

Appl. No.:

14/036316

Inventors:

- Dearborn MI, US
Diana Yanakiev - Birmingham MI, US
Anuradha Annaswamy - W. Newton MA, US
Gregory M. Pietron - Canton MI, US
Bradley D. Riedle - Northville MI, US

Assignee:

FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI

International Classification:

F16H 59/02

US Classification:

7447311

Abstract:

A method for controlling cylinder pressure producing piston displacement for actuating a control element of an automatic transmission during a gearshift, includes (a) applying boost pressure to the to the control valve controlling the piston, provided one of the following conditions is present a boost phase is unexpired, cylinder pressure is less than a desired pressure, and piston displacement exceeds a desired displacement; (b) applying stroke pressure to the cylinder provided piston displacement away from control element plates occurs; and (c) increasing stroke pressure provided piston displacement away from clutch plates has not occurred.

US Patent:

20140229080, Aug 14, 2014

Filed:

Feb 14, 2013

Appl. No.:

13/766829

Inventors:

- Dearborn MI, US
Sarah M. Thornton - Sacramento CA, US
Diana Yanakiev - Birmingham MI, US
James William Loch McCallum - Ann Arbor MI, US
Anuradha Annaswamy - W. Newton MA, US

Assignee:

FORD GLOBAL TECHNOLOGY OPERATIONS, LLC - DEARBORN MI

International Classification:

F16H 61/00

US Classification:

701 51

Abstract:

A method for controlling pressure applied to a displaceable piston in a cylinder, piston displacement actuating a control element of an automatic transmission during a gearshift, includes determining whether piston displacement exceeds a free length of an isolation spring located between the piston and a friction plate of the control element; calculating the pressure using A the cross-sectional area of the piston; K a coefficient of a return spring extending between the piston and a reference position in the cylinder; x the piston displacement; Fa pre-load of the return spring; xthe free length of the isolation spring; and Ka coefficient of the isolation spring; and applying the calculated pressure to the piston.