ALLEN JAMES CLARK
Pilots at Eden Pr Rd, Hopkins, MN
License number
Minnesota A5211452
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
5824 Eden Prairie Rd, Hopkins, MN 55345
Personal information
See more information about ALLEN JAMES CLARK at radaris.comName
Address
Phone
5824 Eden Prairie Rd, Minnetonka, MN 55345
Professional information
See more information about ALLEN JAMES CLARK at trustoria.com
Load Dynamics Compensation Circuit For Servohydraulic Control Systems
Load Dynamics Compensation Circuit For Servohydraulic Control Systems
US Patent:
4537077, Aug 27, 1985
Filed:
Feb 8, 1984
Appl. No.:
6/578055
Inventors:
Allen J. Clark - Minnetonka MN
Dale N. Maue - Minnetonka MN
Dale N. Maue - Minnetonka MN
Assignee:
MTS Systems Corporation - Eden Prairie MN
International Classification:
G01N 2900, G01N 332, B06B 118, G01M 700
US Classification:
73665
Abstract:
A load dynamic compensation circuit for a servohydraulic control system for fixtures and specimens being tested operating in various degrees of freedom, for example in an environment to simulate earthquakes to test building specimens, or to provide road profile simulation for rail and automobile vehicles, or wind buffet loads for aircraft. A compensation circuitry compensates for specimen displacement disturbances in the control loop that are a function of the force exerted from the specimen and the acceleration of the test mass. This specimen disturbance factor may be provided by adding only a differential pressure transducer to measure the force on the actuator, and an accelerometer to measure the mass acceleration, to obtain the necessary electrical signals, which after being modified by factors including the oil column compliance spring factor, the piston area and the servovalve flow gain, is differentiated to compensate for the piston integration, and is then added in a summing junction into the servovalve command signal loop. The compensation signal is an anticipatory signal compensating for load dynamics on the specimen.