DONALD F DECLEENE
Engineers in Ardsley, PA
License number
Pennsylvania PE017454E
Category
Engineers
Type
Professional Engineer
Address
Address
Ardsley, PA 19038
Professional information
Linear And Rotational Accelerometer
US Patent:
5831164, Nov 3, 1998
Filed:
Jan 21, 1997
Appl. No.:
8/786774
Inventors:
M. Mahadeva Reddi - Bryn Mawr PA
Donald F. DeCleene - Wyndmoor PA
Donald F. DeCleene - Wyndmoor PA
Assignee:
Conrad Technologies, Inc. - Paoli PA
International Classification:
G01P 1500
US Classification:
7351401
Abstract:
A two degree of freedom (2 DOF) accelerometer comprising two imbalanced sensing modules (i. e. , bar modules having an unbalance) is provided such that two sensing modules are located in the plane to be measured. The two imbalanced sensing modules have force balance and are used to measure linear and angular accelerations in two degrees of freedom. A single modular design is used for both of the axes. Each of the two individual sensing modules has a housing containing a proof mass for each measured output and a support of the proof mass with the support optimized for the sensitive axis selected for sensor output and having high rigidity in all other axes of the support. Also provided is electrostatic servo force balance technology. A proportional-integral-derivative (PID) controller is used to obtain a closed loop bandwidth of 1 kHz and a steady state error of zero for full scale accelerations up to 75 g's and 1000 rad/sec. sup. 2.