by limiting mechanical stresses

Industry

CPC
F05D2270/114

This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F05Engines, pumps F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS F05D2270/00Control

Current Industry

F05D2270/114by limiting mechanical stresses

Industries

Patents Grantslast 30 patents

Information Patent Grant
Methods and systems for operating an aircraft engine
- Patent number 12,140,075
- Issue date Nov 12, 2024
- Pratt & Whitney Canada Corp.
- Kasra Hamzehi
- G07 - CHECKING-DEVICES
Information Patent Grant
Digital shaft positioning for a turbine rotor
- Patent number 12,084,985
- Issue date Sep 10, 2024
- Kenneth Knecht
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Core turning system
- Patent number 12,018,578
- Issue date Jun 25, 2024
- RTX Corporation
- Bradley C. Schafer
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
System and method for air filtration with self-cleaning filter medi...
- Patent number 11,993,390
- Issue date May 28, 2024
- Airbus Helicopters
- Benoit Fayard
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Method for controlling the bending deformation of a turbomachine sh...
- Patent number 11,946,385
- Issue date Apr 2, 2024
- SAFRAN AIRCRAFT ENGINES
- Clément Georges Henri Gorce
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Compliant shroud designs with variable stiffness
- Patent number 11,773,741
- Issue date Oct 3, 2023
- General Electric Company
- Ravindra Shankar Ganiger
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
System and method for air filtration with self-cleaning filter medi...
- Patent number 11,661,205
- Issue date May 30, 2023
- Airbus Helicopters
- Benoit Fayard
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Cost effective manufacturing method for GSAC incorporating a stampe...
- Patent number 11,555,419
- Issue date Jan 17, 2023
- Raytheon Technologies Corporation
- Christopher W. Strock
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Gas turbine engine operating schedules for optimizing ceramic matri...
- Patent number 11,536,205
- Issue date Dec 27, 2022
- Rolls-Royce plc
- Michael J. Whittle
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method and system for mitigating rotor bow in a turbo machine
- Patent number 11,525,370
- Issue date Dec 13, 2022
- General Electric Company
- Bojan Lukovic
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method and device for detecting conditions conducive to the onset o...
- Patent number 11,512,650
- Issue date Nov 29, 2022
- SAFRAN AIRCRAFT ENGINES
- Emmanuel Mickaël Eburderie
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Transient control to extend part life in gas turbine engine
- Patent number 11,293,353
- Issue date Apr 5, 2022
- Raytheon Technologies Corporation
- Richard P. Meisner
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Gas turbine engine component
- Patent number 11,280,214
- Issue date Mar 22, 2022
- Raytheon Technologies Corporation
- Jesse M. Carr
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Bowed rotor start mitigation in a gas turbine engine using aircraft...
- Patent number 11,274,604
- Issue date Mar 15, 2022
- Raytheon Technologies Corporation
- Frederick M. Schwarz
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Method of starting a gas turbine engine
- Patent number 11,162,428
- Issue date Nov 2, 2021
- General Electric Company
- Praveen Sharma
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Turbomachine rotor and method for producing same
- Patent number 11,078,800
- Issue date Aug 3, 2021
- MAN Energy Solutions SE
- Yves Bidaut
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Apparatus, assemblies, and methods for mitigating thermal bow in th...
- Patent number 11,073,086
- Issue date Jul 27, 2021
- The Boeing Company
- Kevin Brown
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Fan stress tracking for turbofan gas turbine engines
- Patent number 11,047,395
- Issue date Jun 29, 2021
- Raytheon Technologies Corporation
- Juan A. Marcos
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Gas turbine blade flutter monitoring and control system
- Patent number 10,954,812
- Issue date Mar 23, 2021
- General Electric Company
- William Forrester Seely
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Independently controllable wheel for a turbine section of a gas tur...
- Patent number 10,907,540
- Issue date Feb 2, 2021
- Raytheon Technologies Corporation
- Daniel Bernard Kupratis
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Methods and systems for controlling operation of aircraft engines
- Patent number 10,829,235
- Issue date Nov 10, 2020
- Pratt & Whitney Canada Corp.
- Carmine Lisio
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Metered orifice for motoring of a gas turbine engine
- Patent number 10,823,079
- Issue date Nov 3, 2020
- Raytheon Technologies Corporation
- Fadi S. Maalouf
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Turbine engine for reducing rotor bow and method thereof
- Patent number 10,823,014
- Issue date Nov 3, 2020
- General Electric Company
- Tod Robert Steen
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Bowed rotor prevention system
- Patent number 10,801,371
- Issue date Oct 13, 2020
- RAYTHEON TECHNOLOGIES COPRORATION
- Jesse W. Clauson
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Control device of a variable section nozzle and the implementation...
- Patent number 10,787,995
- Issue date Sep 29, 2020
- SAFRAN AIRCRAFT ENGINES
- Pierre Caruel
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Grant
Low-power bowed rotor prevention and monitoring system
- Patent number 10,787,933
- Issue date Sep 29, 2020
- Raytheon Technologies Corporation
- Jesse W. Clauson
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Turbine engine and method of operating
- Patent number 10,724,443
- Issue date Jul 28, 2020
- GENERAL ELECTRIC COMPANY
- Robert Charles Hon
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Methods and systems for controlling operation of aircraft engines
- Patent number 10,683,099
- Issue date Jun 16, 2020
- Pratt & Whitney Canada Corp.
- Carmine Lisio
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Turbine engine exhaust casing with improved lifetime
- Patent number 10,648,366
- Issue date May 12, 2020
- SAFRAN AIRCRAFT ENGINES
- Baptiste Marie Aubin Pierre Jouy
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Airflow control for air turbine starter
- Patent number 10,634,057
- Issue date Apr 28, 2020
- Hamilton Sundstrand Corporation
- Myles R. Kelly
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Patents Applicationslast 30 patents

Information Patent Application
CORE TURNING SYSTEM
- Publication number 20240344466
- Publication date Oct 17, 2024
- RTX Corporation
- Bradley C. Schafer
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
COMPLIANT SHROUD DESIGNS WITH VARIABLE STIFFNESS
- Publication number 20230417149
- Publication date Dec 28, 2023
- GENERAL ELECTRIC COMPANY
- Ravindra Shankar Ganiger
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
SYSTEM AND METHOD FOR AIR FILTRATION WITH SELF-CLEANING FILTER MEDI...
- Publication number 20230264828
- Publication date Aug 24, 2023
- AIRBUS HELICOPTERS
- Benoit FAYARD
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
METHODS AND SYSTEMS FOR OPERATING AN AIRCRAFT ENGINE
- Publication number 20230184166
- Publication date Jun 15, 2023
- Pratt & Whitney Canada Corp.
- Kasra HAMZEHI
- G07 - CHECKING-DEVICES
Information Patent Application
GAS TURBINE ENGINE STARTER SYSTEMS AND ASSOCIATED METHODS
- Publication number 20230030319
- Publication date Feb 2, 2023
- The Boeing Company
- John Carl Szillat
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
COMPLIANT SHROUD DESIGNS WITH VARIABLE STIFFNESS
- Publication number 20220397038
- Publication date Dec 15, 2022
- GENERAL ELECTRIC COMPANY
- Ravindra Shankar Ganiger
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
DIGITAL SHAFT POSITIONING FOR A TURBINE ROTOR
- Publication number 20220154595
- Publication date May 19, 2022
- Kenneth Knecht
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD AND SYSTEM FOR MITIGATING ROTOR BOW IN A TURBO MACHINE
- Publication number 20220154594
- Publication date May 19, 2022
- GENERAL ELECTRIC COMPANY
- Bojan Lukovic
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD FOR CONTROLLING THE BENDING DEFORMATION OF A TURBOMACHINE SH...
- Publication number 20220098997
- Publication date Mar 31, 2022
- SAFRAN AIRCRAFT ENGINES
- Clément Georges Henri GORCE
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
SYSTEM AND METHOD FOR AIR FILTRATION WITH SELF-CLEANING FILTER MEDI...
- Publication number 20210403172
- Publication date Dec 30, 2021
- AIRBUS HELICOPTERS
- Benoit FAYARD
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
GAS TURBINE ENGINE AND OPERATION METHOD
- Publication number 20210254490
- Publication date Aug 19, 2021
- Rolls-Royce plc
- Nicholas S. CRISTINACCE
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
BOWED ROTOR START MITIGATION IN A GAS TURBINE ENGINE USING AIRCRAFT...
- Publication number 20200291860
- Publication date Sep 17, 2020
- United Technologies Corporation
- Frederick M. Schwarz
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHODS AND SYSTEMS FOR CONTROLLING OPERATION OF AIRCRAFT ENGINES
- Publication number 20200269989
- Publication date Aug 27, 2020
- Pratt & Whitney Canada Corp.
- CARMINE LISIO
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Application
AIRFLOW CONTROL FOR AIR TURBINE STARTER
- Publication number 20200217251
- Publication date Jul 9, 2020
- HAMILTON SUNDSTRAND CORPORATION
- Myles R. Kelly
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
APPARATUS, ASSEMBLIES, AND METHODS FOR MITIGATING THERMAL BOW IN TH...
- Publication number 20200165976
- Publication date May 28, 2020
- The Boeing Company
- Kevin Brown
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
COST EFFECTIVE MANUFACTURING METHOD FOR GSAC INCORPORATING A STAMPE...
- Publication number 20200149431
- Publication date May 14, 2020
- United Technologies Corporation
- Christopher W. Strock
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
METHOD AND DEVICE FOR DETECTING CONDITIONS CONDUCIVE TO THE ONSET O...
- Publication number 20200010211
- Publication date Jan 9, 2020
- SAFRAN AIRCRAFT ENGINES
- Emmanuel Mickaël Eburderie
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Application
GAS TURBINE ENGINE MOTORING SYSTEM FOR BOWED ROTOR ENGINE STARTS
- Publication number 20190219021
- Publication date Jul 18, 2019
- HAMILTON SUNDSTRAND CORPORATION
- John T. Pech
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Method of Starting a Gas Turbine Engine
- Publication number 20190186368
- Publication date Jun 20, 2019
- GENERAL ELECTRIC COMPANY
- Praveen Sharma
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
METHOD OF MONITORING RUBBING BETWEEN A ROTARY PARTY AND A STATIONAR...
- Publication number 20190154495
- Publication date May 23, 2019
- Nuovo Pignone Srl
- Antonello PEPE
- G01 - MEASURING TESTING
Information Patent Application
AIRCRAFT POWER SETTING TRIMS FOR LIFE EXTENSION
- Publication number 20190031358
- Publication date Jan 31, 2019
- United Technologies Corporation
- Kurt J. Sobanski
- G05 - CONTROLLING REGULATING
Information Patent Application
INTEGRATED FUEL AND BLEED SYSTEM CONTROL ARCHITECTURE
- Publication number 20190010876
- Publication date Jan 10, 2019
- HAMILTON SUNDSTRAND CORPORATION
- Robert M. DeRoy
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
SYSTEMS AND METHODS FOR BOWED ROTOR START MITIGATION
- Publication number 20180334963
- Publication date Nov 22, 2018
- GENERAL ELECTRIC COMPANY
- Christian Michael Fernholz
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
PIEZO-ELECTRIC MOTOR FOR BOWED ROTOR MITIGATION
- Publication number 20180283219
- Publication date Oct 4, 2018
- The Boeing Company
- Jason J. Jackowski
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SYSTEM AND METHOD FOR IMPROVED TURBOMACHINERY OIL LUBRICATION SYSTEM
- Publication number 20180252116
- Publication date Sep 6, 2018
- GENERAL ELECTRIC COMPANY
- Mareldi Ahumada Parás
- F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF...
Information Patent Application
TURBINE ENGINE EXHAUST CASING WITH IMPROVED LIFETIME
- Publication number 20180195416
- Publication date Jul 12, 2018
- SAFRAN AIRCRAFT ENGINES
- Baptiste Marie Aubin Pierre JOUY
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
TURBINE ENGINE AND METHOD OF OPERATING
- Publication number 20170342908
- Publication date Nov 30, 2017
- GENERAL ELECTRIC COMPANY
- Robert Charles Hon
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SYSTEM AND METHOD OF GAS TURBINE ENGINE SHAFT COOLING
- Publication number 20170335772
- Publication date Nov 23, 2017
- HAMILTON SUNDSTRAND CORPORATION
- Joseph Kenneth Coldwate
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
SYSTEM AND METHOD FOR PROTECTING THE STRUCTURAL INTEGRITY OF AN ENG...
- Publication number 20170267365
- Publication date Sep 21, 2017
- The Boeing Company
- Robert S. Wright
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
BOWED ROTOR START RESPONSE DAMPING SYSTEM
- Publication number 20170234158
- Publication date Aug 17, 2017
- United Technologies Corporation
- Gregory M. Savela
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

by limiting mechanical stresses

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Methods and systems for operating an aircraft engine

Digital shaft positioning for a turbine rotor

Core turning system

System and method for air filtration with self-cleaning filter medi...

Method for controlling the bending deformation of a turbomachine sh...

Compliant shroud designs with variable stiffness

System and method for air filtration with self-cleaning filter medi...

Cost effective manufacturing method for GSAC incorporating a stampe...

Gas turbine engine operating schedules for optimizing ceramic matri...

Method and system for mitigating rotor bow in a turbo machine

Method and device for detecting conditions conducive to the onset o...

Transient control to extend part life in gas turbine engine

Gas turbine engine component

Bowed rotor start mitigation in a gas turbine engine using aircraft...

Method of starting a gas turbine engine

Turbomachine rotor and method for producing same

Apparatus, assemblies, and methods for mitigating thermal bow in th...

Fan stress tracking for turbofan gas turbine engines

Gas turbine blade flutter monitoring and control system

Independently controllable wheel for a turbine section of a gas tur...

Methods and systems for controlling operation of aircraft engines

Metered orifice for motoring of a gas turbine engine

Turbine engine for reducing rotor bow and method thereof

Bowed rotor prevention system

Control device of a variable section nozzle and the implementation...

Low-power bowed rotor prevention and monitoring system

Turbine engine and method of operating

Methods and systems for controlling operation of aircraft engines

Turbine engine exhaust casing with improved lifetime

Airflow control for air turbine starter

Patents Applicationslast 30 patents

CORE TURNING SYSTEM

COMPLIANT SHROUD DESIGNS WITH VARIABLE STIFFNESS

SYSTEM AND METHOD FOR AIR FILTRATION WITH SELF-CLEANING FILTER MEDI...

METHODS AND SYSTEMS FOR OPERATING AN AIRCRAFT ENGINE

GAS TURBINE ENGINE STARTER SYSTEMS AND ASSOCIATED METHODS

COMPLIANT SHROUD DESIGNS WITH VARIABLE STIFFNESS

DIGITAL SHAFT POSITIONING FOR A TURBINE ROTOR

METHOD AND SYSTEM FOR MITIGATING ROTOR BOW IN A TURBO MACHINE

METHOD FOR CONTROLLING THE BENDING DEFORMATION OF A TURBOMACHINE SH...

SYSTEM AND METHOD FOR AIR FILTRATION WITH SELF-CLEANING FILTER MEDI...

GAS TURBINE ENGINE AND OPERATION METHOD

BOWED ROTOR START MITIGATION IN A GAS TURBINE ENGINE USING AIRCRAFT...

METHODS AND SYSTEMS FOR CONTROLLING OPERATION OF AIRCRAFT ENGINES

AIRFLOW CONTROL FOR AIR TURBINE STARTER

APPARATUS, ASSEMBLIES, AND METHODS FOR MITIGATING THERMAL BOW IN TH...

COST EFFECTIVE MANUFACTURING METHOD FOR GSAC INCORPORATING A STAMPE...

METHOD AND DEVICE FOR DETECTING CONDITIONS CONDUCIVE TO THE ONSET O...

GAS TURBINE ENGINE MOTORING SYSTEM FOR BOWED ROTOR ENGINE STARTS

Method of Starting a Gas Turbine Engine

METHOD OF MONITORING RUBBING BETWEEN A ROTARY PARTY AND A STATIONAR...

AIRCRAFT POWER SETTING TRIMS FOR LIFE EXTENSION

INTEGRATED FUEL AND BLEED SYSTEM CONTROL ARCHITECTURE

SYSTEMS AND METHODS FOR BOWED ROTOR START MITIGATION

PIEZO-ELECTRIC MOTOR FOR BOWED ROTOR MITIGATION

SYSTEM AND METHOD FOR IMPROVED TURBOMACHINERY OIL LUBRICATION SYSTEM

TURBINE ENGINE EXHAUST CASING WITH IMPROVED LIFETIME

TURBINE ENGINE AND METHOD OF OPERATING

SYSTEM AND METHOD OF GAS TURBINE ENGINE SHAFT COOLING

SYSTEM AND METHOD FOR PROTECTING THE STRUCTURAL INTEGRITY OF AN ENG...

BOWED ROTOR START RESPONSE DAMPING SYSTEM