DOUGLAS ALLAN LUND
Pilots at Skyline Way, Anacortes, WA
License number
Washington A1158452
Issued Date
May 2015
Expiration Date
May 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
1616 Skyline Way APT 1, Anacortes, WA 98221
Professional information
High Frequency Multiple Degree Of Freedom Vibration Test Machine
US Patent:
6860152, Mar 1, 2005
Filed:
Apr 26, 2002
Appl. No.:
10/133962
Inventors:
Douglas A. Lund - Anacortes WA, US
William B. Woyski - Anacortes WA, US
William B. Woyski - Anacortes WA, US
Assignee:
Team Corporation - Burlington WA
International Classification:
G01M007/06
US Classification:
73663, 73665
Abstract:
A vibration test machine comprises a stationary outer frame, a shake table in the form of a mass to which vibration energy is transmitted inside the outer frame, a driven preload piston supported by the outer frame and coupled to one side of the shake table, a passive preload piston supported by the outer frame and coupled to the shake table on a side opposite from the driven preload piston, and an external force generator external to the outer frame and coupled to the driven piston for inducing high frequency vibrational energy to the driven piston which, in turn, transmits that vibration energy to the shake table. In one embodiment, a multiple degree of freedom shaker comprises multiple exterior force generators each coupled to a corresponding driven preload piston having a related passive preload piston on a opposite side of the shake table. The preload piston couplings to the shake table comprise self-aligning bearing pads to accommodate the multiple degrees of freedom vibrational motion induced in the shake table.
Inertial Mass Guided Single Axis Vibration Test Machine
US Patent:
7267010, Sep 11, 2007
Filed:
Jun 17, 2005
Appl. No.:
11/155999
Inventors:
Douglas A. Lund - Anacortes WA, US
Assignee:
Team Corporation - Burlington WA
International Classification:
G01M 7/04
US Classification:
73663
Abstract:
A single axis vibration test system includes a vibration force generator or “shaker” which can be used with a head expander, and separate pairs of hydrostatic self-aligning sliding bearings connecting two large reaction masses to the head expander. Preload forces are applied by separate preload pistons supported on a preload ring surrounding the shaker. Preload forces are transmitted by the preload ring to the sliding bearings to clamp the head expander directly to the reaction masses, which resists lateral and rotational motions during vertical axis testing. The reaction masses are supported on resilient supports carried on a sub-structure rigidly affixed to ground, for avoiding a rigid connection between the preload ring and ground which in turn avoids unwanted mechanical resonances within the operational frequency range of the system during use.