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HG4930 INERTIAL

MEASUREMENT UNIT (IMU)

Installation and Interface Manual

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Summary of Contents for HG4930

Page 1: ...HG4930 INERTIAL MEASUREMENT UNIT IMU Installation and Interface Manual ...

Page 2: ... Mode Description Mechanical Drawing and Installation Export Guidance Contact Us Table of Contents 5 5 8 8 9 9 9 Table 1 Connector Pin Description Table 2 Input Power Specifications Table 3 Asynchronous Control Message 0x01 Format Table 4 Asynchronous Control Message Field Status Word 1 Table 5 Asynchronous Control Message Field Status Word 2A Table 6 Asynchronous Control Message Field Status Word...

Page 3: ...com HG4930 3 5 7 10 11 12 Figure 1 Figure 1 Typical Cold Left Figure and Hot Voltage In Rush Plots Figure 2 Data Synchronization Signal Timing Figure 3 Power Up Sequence Figure 4 Accelerometer and Gyro Senor Mounting Figure 5 Installation Drawing Table of Figures ...

Page 4: ...ineering infrastructure Honeywell has deep and long lasting relations with many commercial customers and is carrying that philosophy and product pedigree into our NLR IMU line Honeywell s forward looking product strategies will ensure that our NLR IMU s will fit your current and future needs The HG4930 IMU is a device which measures angular rates and linear accelerations in a body mounted strapdow...

Page 5: ...ve pull down to logic 0 7 No Connect 8 No Connect 9 SER_DATA_OUT_H Output RS 422 Asynchronous High 10 SER_DATA_OUT_L Output RS 422 Asynchronous Low 11 DATA_SYNC_OUT_H Output RS 422 Data Sync High 12 DATA_SYNC_OUT_L Output RS 422 Data Sync Low 13 No Connect 14 No Connect Table 2 Input Power Specifications VOLTAGE VDC TOLERANCE MAX RIPPLE MV P P MAX RUN CURRENT AMP MAX CURRENT MA 5 5 50 1 0 700 The ...

Page 6: ...600 Hz control data output consists of the angular rates linear acceleration and IMU status words in message ID 0x01 and 0x02 The angular and linear data is filtered and sampled at 1800 Hz The 1800 Hz filtered angular and linear data is decimated for 600 Hz control data The 100 Hz navigation data output consists of incremental or delta angles and velocities in message ID 0x02 The navigation data i...

Page 7: ...ire update of the body to local vertical attitude reference transformation of the body axis delta velocity components to the local vertical frame followed by update of the local vertical attitude components Data Synchronization Signal The Data Synchronization Signal shall be an active low pulse with the following characteristics Pulse start is within 1 microsecond of the most recent data sample ev...

Page 8: ...out regard for rollover 2 N A this pseudo code illustrates the checksum algorithm u16sum 0 for i 0 i 9 i 20 2 2 9 u16sum u16_msg_array i Checksum u16_msg_array 9 if Checksum u16sum checksum error Total Length 20 BIT DEFINITION NOTES Bit 0 1 2 Bit Counter 00 01 10 11 Bit 2 3 2 bit BIT mode indicator 0 Power up BIT 1 Continuous BIT 2 3 Reserved Bit 4 IMU 0 OK 1 Failed These fault monitors are aggreg...

Page 9: ...y X 4 2 27 0 3048 meters sec LSB or equivalently 0 3048 meters sec2 Hz LSB 15 Delta Velocity Y 4 2 27 16 Delta Velocity Z 4 2 27 17 Checksum Sum of all message data positions 1 16 of this table taken as 16 bit words and summed without regard for rollover 2 N A this pseudo code illustrates the checksum algorithm u16sum 0 for i 0 i 21 i 44 2 2 21 u16sum u16_msg_array i Checksum u16_msg_array 21 if C...

Page 10: ...nsmits a fixed pattern 0x5555 Hex in place of Control sensor data and 0x55555555 Hex in place of Inertial sensor data until the completion of Power Up BIT The IMU completes Power Up BIT and report the results within 400 milliseconds after power is within specified tolerances and IMU Reset is inactive Figure 3 Power Up Sequence Supervisor Reset or External IMU Reset Released Power Applied 40ms Seri...

Page 11: ...ion across a broad temperature range Because of their precision users can interpret real motion both angular and linear as sensor noise This noise can often be coupled mechanically through the mounting plate Installation on a thin structure is generally not desirable Placement at anti nodes will minimize angular rotation and maximize linear displacement Placement at nodes will maximize angular rot...

Page 12: ...nstallation and Interface Manual aerospace honeywell com HG4930 12 Figure 5 Installation Drawing Dimensioning and Tolerancing IAW ANSI Y14 5M 1982 All Dimensions are in Inches STP File Available from Honeywell ...

Page 13: ...is subject to export regulations This manual contains technology that has an Export Commodity Classification of ECCN 7E994 with associated country chart control code of AT1 This technology generally will not require a license to be exported or re exported However if you plan to export this item to an embargoed or sanctioned country to a party of concern or in support of a prohibited end use you ma...

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