Gerald Held

US Patent:

60145048, Jan 11, 2000

Filed:

Aug 27, 1996

Appl. No.:

8/703607

Inventors:

David C. Saine - Brea CA
Gerald E. Held - Santa Ana CA
David A. Norris - Brea CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01R 3102

US Classification:

39550003

Abstract:

Fault simulation apparatus 10 that simulates faults in a piece of equipment 12 coupled to a VME bus 11. A computer 30 generates user defined faults that are to be simulated and provides initialization data and control signals to VME fault insertion apparatus 20 coupled between the VME bus 11 and the piece of equipment 12. The VME fault insertion apparatus 20 comprises bus fault logic 15 interposed in request and acknowledgment signal lines and data lines, that intercepts normal bus data transmission, and inserts user-defined data into bus data that is transmitted to the equipment 12 to simulate failures therein in response to fault definition signals 23. A fault processor 16 receives initialization data and control signals from the computer 30, sets an address of the VME fault insertion apparatus 20, interprets received commands, outputs address select signals that decode the address lines, and outputs fault definition signals 23 to the bus fault logic 15 in response to the initialization data and control signals that define the fault that is to be simulated. Function select logic 13 decodes the address lines in response to the address select signals provided by the fault processor 16 that enables selected data paths through the bus fault logic 15. Using the present invention, a user can easily activate and deactivate simulated faults in the equipment 12.

US Patent:

59131594, Jun 15, 1999

Filed:

Sep 14, 1992

Appl. No.:

7/944561

Inventors:

James O. Muirhead - San Pedro CA
Gerald E. Held - Santa Ana CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

H04B 1700
G01S 302

US Classification:

4552264

Abstract:

An adaptive signal level detector. The inventive detector includes a first circuit for receiving an input signal and providing a second signal identical to said input signal and delayed relative thereto. The amplitude of the delayed signal is compared to the maximum amplitude of the input signal. When the second signal is at a predetermined level relative to the input signal an output signal is provided. In a specific implementation, the invention (10) includes a first circuit (18) for detecting the signal level of the transmitted signal and providing a second signal in response thereto. The second signal is a logarithmic representation of the input signal The second signal is delayed (20) to provide a third signal. The third signal is subtracted (24) from the second signal to provide a fourth signal. When the fourth signal exceeds a predetermined threshold, an output signal is provided.

US Patent:

52807517, Jan 25, 1994

Filed:

Nov 26, 1991

Appl. No.:

7/798480

Inventors:

James O. Muirhead - Torrance CA
Gerald E. Held - Santa Ana CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

F42B 1240

US Classification:

102210

Abstract:

A munition incorporating a miniature transmitter (25) and a piezoelectric power supply (45) which converts a portion of the kinetic energy of the projectile (20), upon impact, into radio frequency energy and radiates that energy into space. The transmitter (25) can be made in suitable sizes to fit various calibers of ammunition. Different caliber ammunition can be made to radiate different frequencies. The transmitted RF energy allows the point of impact of the projectiles to be located with a high degree of precision. This type of munition may be used in the scoring of air to ground gunnery in training environments by receiving the RF energy at several known locations and determining the point of impact using time of arrival or angle of arrival techniques. Frequency discrimination allows simultaneous scoring of multiple weapons from the same aircraft or from multiple aircraft. The munition may be employed in tactical applications by allowing the fall of fire to be located and adjusted.