Atch 01_Req Document_Ruggedized DAS_Rev 1.pdf

Ruggedized Data Acquisition System (DAS)

Requirements Document for

704th Test Group/846th Test Squadron

1.0 PURPOSE

The 704th Test Group (704 TG) mission is to be the premier provider of unique test and evaluation capabilities relevant to tomorrow’s warfighter through world-class people improving technical excellence, cost-effectiveness, and agility. The 846th Test Squadron (846 TS) is one of the units assigned to the 704

TG. The 846 TS’s primary test capability is the Holloman High Speed Test Track (HHSTT) where they utilize rocket powered sled trains to simulate flight like environments and scenarios with the control and recovery of a ground based system. In order to collect data from these systems a robust data acquisition system is required. These tests are required for the test mission and validation of various avionics platforms, payloads, and equipment for the Department of Defense in conjunction with its partners over a number of differeing rocket sled configurations. The 846 TS has purchased two DTS Slice NANOs, and requires two (2) additional data acquisition system that will interface directly to the DTS Slice NANOs, but with additional collection capability, to continually meet customer requirements.

2.0 SCOPE

The Contractor shall deliver two (2) DAS system and meet the following requirements:

2.1 Operational requirements:

2.1.1 System Control:

2.1.1.1 DAS shall have a single controlling module capable of operating up to 24 channels of analog data

2.1.1.2 System shall be capable of communicating with a PC over Ethernet to a distance of 350 feet without external aid and to a distance of 1000 feet with an Ethernet extender

2.1.2 Data Acquisition Parameters:

2.1.2.1 For piezo-resistive and voltage input sensors, DAS must provide the following signal conditioning characteristics:

2.1.2.1.1 Input range of ±2.4 V

2.1.2.1.2 Programmable bandwidth of DC to 35 kHz

2.1.2.1.3 Programmable gain range of 1.0 to 1280

2.1.2.1.4 Auto offset range with 100% of effective input range

2.1.2.1.5 Software controlled half-bridge completion

2.1.2.1.6 Automatically calculated emulation method shunt check

2.1.2.1.7 Linearity 0.2% for gain setting of 1 to 320, and 0.5% for gain setting >320)

2.1.2.1.8 Accuracy of 0.5% including reference uncertainty

2.1.2.2 For piezo-electric sensors, DAS must provide the following signal conditioning characteristics:

2.1.2.2.1 Input range of 0.5-23.5 V

2.1.2.2.2 Programmable bandwidth of DC to 35 kHz

2.1.2.2.3 Programmable gain options of 1 or 10

2.1.2.2.4 Auto offset range with 100% of effective input range

2.1.2.3 DAS must contain anti-aliasing capability with the following specifications:

2.1.2.3.1 Fixed 4-pole butterworth low pass filter with 40 kHz knee frequency

2.1.2.3.2 Programmable 5-pole butterworth low pass filter, configurable between 1 Hz and 35 kHz

2.1.2.3.3 Filter response must meet SAE J211/ISO6487 response cooridoors

2.1.2.4 DAS shall contain one 16-bit SAR (Successive Approximation Register) ADC per channel, with simultaneous sampling of all channels.

2.1.3 Triggers (DAS unit will provide the following triggering capability):

2.1.3.1 Triggering by means of:

2.1.3.1.1 Contact closure & TTL logic-level (active low)

2.1.3.1.2 Positive and/or negative level on any active sensor channel

2.1.3.2 Software triggering shall be available for daisy-chained systems

2.1.4 Power (DAS shall have the following power characteristics):

2.1.4.1 Operate on 9 to 18 VDC

2.1.4.2 Maximum current draw ≤ 1.0 amps

2.1.4.3 Remote power control input for on/off

2.1.4.4 Reverse current and electrostatic discharge protection

2.1.5 Data Recording:

2.1.5.1 Minimum of 16 GB of non-volatile system memory

2.1.5.2 Must include multiple data recording modes:

2.1.5.2.1 Recorder

2.1.5.2.2 Circular buffer

2.1.5.2.3 Multiple event

2.1.5.2.4 Arm on power-up

2.1.5.3 Maximum sample rate per channel shall be no less 200,000 samples /second

2.1.5.4 Minimum sample rate per channel shall be no more than 10 samples /second

2.1.6 Excitation (DAS unit will provide the following excitation capability):

2.1.6.1 For piezo-resistive and voltage input sensors:

2.1.6.1.1 Independently regulated channels

2.1.6.1.2 Supply 5 V and up to 20 mA per channel

2.1.6.1.3 Include short circuit protection

2.1.6.2 For piezo-electric sensors:

2.1.6.2.1 Supply one 2.2 mA constant-current source per channel at up to 24 V

2.1.6.3 DAS shall shut down excitation when not armed or recording

2.1.7 Hardware Interface:

2.1.7.1 DAS must directly interface with:

2.1.7.1.1 Minimum of 18 piezo-resistive or voltage input sensors

2.1.7.1.2 Minimum of three piezo-electric sensors

2.1.7.2 Contain internal three-axis 100G accelerometer

2.1.7.3 Allow for connection to multiple data acquisition systems including:

2.1.7.3.1 Two Slice NANO via Base-to-Base daisy chain

2.1.7.3.2 Two additional data acquisition systems with no more than 5 meter separation

2.1.7.4 DAS shall have electronic ID interface to automatically read and determine what sensor is attached to each sensor input channel

2.1.7.5 Interface will be internal for any modular components

2.1.8 Physical and Environmental:

2.1.8.1 Mounting shall be accomplished with no less than two 8-32 bolts through the face of the machined case

2.1.8.2 Interfacing connectors shall be mounted on the face of the machined aluminum case

2.1.8.3 System shall not be larger than 2.25”L x 2.25”W x 4.5”H

2.1.8.4 System shall not exceed 14 oz

2.1.8.5 Operational Temperature range of -40 to 140°F

2.1.8.6 Operational Humidity of 95% RH non-condensing

2.1.8.7 Shock on all axis ± 500 g, 4 msec half sine

2.1.8.8 Vibration on all axis shall meet MIL-STD-810G

2.2 Documentation and Support:

2.2.1 An operations manual for the unit will be provided

2.2.2 DAS control software shall be provided

3.0 MILESTONES

The contractor shall deliver two (2) 24-channel ruggedized data acquisition systems no later than 28 Feb

2021.

4.0 DELIVERABLES

The contractor shall deliver all hardware and documentation FOB Destination to 704 TSS/XPL, Attn: 846

TS/TGTMI, 1644 Vandergrift Road, Building 1260, Holloman Air Force Base, New Mexico 88330-7850.