Abstract:
Piezoelectric transducer drive apparatus applies varying pulse rates to the terminals of the transducer with the transducer acting as a capacitor and integrating the applied pulses. A conductive path from each transducer terminal removes charge from each terminal. Control of the voltage across the transducer is achieved by individually varying the pulse rates applied to each of the transducer terminals.
Abstract:
A piezoelectric transducer drive apparatus continuously charges the terminals of the transducer through either resistors or constant current diodes. Digital words related to desired voltages at the transducer terminals are converted to first and second pulse rates. The first and second pulse rates separately discharge the terminals of the transducer through resistors or constant current diodes to achieve control of the drive voltage.
Abstract:
An improved PLL synthesizer (10) including a gain control compensator (40) which compensates the PLL synthesizer output over the frequency range of operation of the PLL synthesizer. The gain control compensator includes a gain control amplifier (48) and programmable resistor (46) which function to eliminate the effects of changing N over the frequency range of operation. The gain control amplifier couples a loop filter (18) output signal to the VCO (20) and generates a factor equal to an inverse N to compensate the PLL synthesizer. The PLL synthesizer can compensate for gain non-linearity in the VCO transfer function.
Abstract:
A readout device is provided for use in a ring laser angular rate sensor assembly which has improved low rate performance. Low rate performance is improved by reducing sources of backscatter thus not allowing light to be reflected back into the optical signal carrying medium. Backscatter is reduced by placing the optical sensors (62, 64) directly upon the gyro output mirror (14), thus causing the optical sensors to be dithered along with the laser block (10). By dithering the optical sensors, any backscatter caused by these elements is dealt with by dithering. While the optical sensors are dithered, the readout apparatus (44) continues to utilize the advantages of a case mounting.
Abstract:
A functional radar warning receiver back-up generator (225) provides threat information in the total absence or partial absence of the radar warning receiver information (42, 208). Radar warning receiver information (42, 208) such as radar detection data and radar identification data is also generated by other systems such as the Pulsed Radar Jammer (36) and the Continuous Wave Radar Jammer (34). An on-board computer processes and presents the back-up information to the pilot as if the Radar Warning Receiver (12) was still operational. Voice (226) and video (224) functions of the Radar Warning Receiver (12) are also displayed and presented to the pilot. Partial back-up (222) and full back-up (220) of the Radar Warning Receiver (12) are provided. A temporal data correlation algorithm (206), a radar emitter ID conversion algorithm (260), cross sensor correlation algorithm (248) and prioritization algorithm (244, 252) provide the back-up data.
Abstract:
A complementary threat sensor data fusion capability for an aircraft survivability equipment system (10). A set of aircraft survivability sensors (12, 32, 34, 36) provides a threat sensor data fusion control process (302) with status data (304). The control process controls (302) whether or not a threat ambiguity detector (308) receives radar warning receiver data (42) or a radar emitter ID conversion apparatus (310) receives pulsed radar jammer data (38) or continuous wave radar jammer data (46). The threat sensor data fusion control process (302) also determines whether missile approach detector data (48) is sent to a countermeasures analyzing apparatus (326). The threat ambiguity detector (308) provides ambiguity data (340) to a threat ambiguity resolving apparatus (324). The radar emitter ID conversion apparatus (310) provides converted jammer data (342) to a functional sensor back-up apparatus (201). The radar emitter ID conversion process (310) receives a common radar emitter (ID) data base (312). The threat sensor data fusion process controller (302) also provides fusion process control (338) to the complementary threat data apparatus (322). Complementary threat data (332) is provided to the pilot through various presentation methods and to the jammers (34, 36) for electronic countermeasures. Also, threat ambiguity resolution data (334) is provided and back-up data (228, 230) is provided. The presentation methods include video (224) and voice (226) and a tactical electronics countermeasures command (330) is automatically initiated. A multi-pass sensor data correlation algorithm (328) and a threat prioritization algorithm (252) share information with the threat ambiguity resolving algorithm (324), complementary threat data algorithm (322), functional sensor back-up apparatus (201), and electronic countermeasures apparatus (326). The direction of jamming is determined by data correlation between the radar warning receiver (12) and the CW Jammer (34).
Abstract:
Control apparatus for an RLG dither motor (10) includes a digital phase shifter (40) for providing a clock signal related to the RLG position signal. A rate pulse generator (50) for receiving an amplitude word signal generated by a processor (28) at intervals determined by the clock signal provides a pulse rate signal related to the amplitude word signal. The pulse rate signal (51) is combined with the RLG position signal (33) to provide a second pulse rate signal which is integrated to provide a triangular dither drive signal.
Abstract:
A thermoelectric sensor element that is adapted to respond to thermal radiation is capable of manufacture into a sensor array on a single crystal semiconductor means, such as silicon. An anisotropically etched pit is provided under the sensing surface, and the pit generally corresponds to the geometry of the sensor element. The geometry is selected to be rectangular and falls along a selected orientation of the particular crystalline structure used for manufacture of the device to thereby allow for a high density of the sensor elements. The sensor elements are manufactured of two dissimilar metals in a sinuous pattern to provide the thermoelectric effect.
Abstract:
An annunciator for the status of interlock switches connected into a series circuit for supplying power from a power source to a load, includes a memory recording the status of each switch at a selectable instant. A plurality of display elements are arranged in a pattern corresponding to the pattern of the interlock switch circuit. A manually operable switch allows a user to select for graphically showing with the display either the switch status recorded by the memory or the current status of the switches. The signals controlling the display are conditioned so that the particular display element assigned to the first out switch as recorded in the memory flashes to indicate the switch closest to the power source which was not conducting at the selectable instant.