# BLADE-EDGE Governance Node Project Guide

## Overview
The BLADE-EDGE Governance Node is a rugged, portable edge computing device designed for real-time trust and multi-sensor consensus in critical environments. It integrates GPU-accelerated edge AI, robust power systems with redundancy, and secure communication links for latency-critical operations, all within a MIL-STD-810G rated, IP67 sealed, and MIL-STD-1275 compliant chassis. Key subsystems include redundant compute (Jetson Orin, Zynq US+), a secure power backbone, diverse sensor inputs, and a robust, tamper-evident enclosure.

## Assumptions
*   **Power Source:** Stable 28VDC input, MIL-STD-1275 compliant, available for primary and redundant power paths.
*   **Environment:** Operation in harsh, military-grade conditions (MIL-STD-810G, IP67) with extreme temperature fluctuations.
*   **Skill Level:** Assemblers possess expertise in military-spec hardware integration, secure electronics handling, and thermal management.
*   **Software/Firmware:** Pre-validated golden bitstreams for secure_fpga_eeprom and OS images for Jetson Orin are prepared.
*   **Cable Harnesses:** Pre-fabricated MIL-DTL-27500 internal cable harness for all internal electrical connections.

## Action Items
- [ ] Fabricate Main Chassis, Top Cover, Internal Base Mounting Plate, Connector Gland Plate, NATO Rail Mount, NVMe SSD Mount, and Thermal Spreader Plate per mechanical drawings.
- [ ] Mount all MIL-DTL-38999 connectors (power, sensors, commands, datalink, antenna) to the Connector Gland Plate with EMI backshells and secure to Main Chassis.
- [ ] Apply conformal coating to custom_carrier_board, mil_std_1553_module, puf_hsm, atmospheric_sensor_module, gpio_driver_module, safety_interlock_relay, and all sensing modules (IMUs, LIDAR).
- [ ] Integrate and secure all power components (EMI filters, MIL-STD-1275 power modules, battery backups, supercapacitor bank, OR-Diode Isolation Module, PDU, DC-DC converter bank) to the Internal Base Mounting Plate.
- [ ] Mount custom_carrier_board, Jetson AGX Orin modules, Zynq UltraScale+ modules, NVMe SSDs, and industrial Ethernet switches to the Internal Base Mounting Plate using standoffs and appropriate brackets.
- [ ] Install vapor_chamber_cooler and thermal_spreader_plate with thermal interface materials to main chassis and all major compute modules (Jetson, Zynq) for optimal heat dissipation.
- [ ] Install and wire all sensing and actuation modules (M-Code GPS, IMUs, LIDAR, atmospheric sensor, laser director GPIO, safety interlock, MANET radios, flight recorder) to their respective power and data connections.
- [ ] Integrate all security and redundancy features: PUF HSM, tamper mesh, chassis intrusion switch, secure FPGA EEPROMs, supervisor watchdog ICs, and MIL-STD-1553 link encryptors.
- [ ] Install EMI gaskets, bonding strap kit, TVS diode array, and gas discharge tubes to ensure EMI/EMP compliance and system grounding.
- [ ] Route and connect all internal MIL-DTL-27500 cable harness connections according to the wiring diagram, ensuring proper strain relief and EMI shielding.
- [ ] Mount sealed fans, ensuring proper airflow for internal circulation and exhaust.
- [ ] Perform final assembly: Install IP67 sealing gasket, secure Top Cover with screws, and apply tamper-evident seals.

## Assembly Key Points

| Component A                    | Component B                        | Key Considerations                                          |
| :----------------------------- | :--------------------------------- | :---------------------------------------------------------- |
| main_chassis                   | top_cover                          | IP67_gasket ensures environmental seal.                     |
| custom_carrier_board           | m3_standoffs_pcb                   | Proper alignment for all module mounting.                   |
| jetson_orin_primary            | thermal_spreader_plate             | Optimal thermal paste application for heat transfer.        |
| zynq_us_primary                | thermal_spreader_plate             | Ensure tight contact and even pressure.                     |
| thermal_spreader_plate         | vapor_chamber_cooler               | Consistent thermal interface material application.          |
| vapor_chamber_cooler           | main_chassis                       | Secure mounting for efficient heat dissipation.             |
| mil_dtl_38999_conn_power       | emi_filter_1                       | Correct pin assignment for 28VDC input.                     |
| mil_dtl_38999_conn_antenna_1   | gas_discharge_tubes                | Proper RF signal path and surge protection.                 |
| manet_radio                    | mil_dtl_38999_conn_datalink        | Ensure secure Ethernet and RF connections.                  |
| custom_carrier_board           | nvme_ssd                           | PCIe Gen4x4 M.2 slot compatibility and secure mounting.     |
| chassis_intrusion_switch       | top_cover                          | Correct placement for reliable tamper detection.            |
| industrial_ethernet_switch     | custom_carrier_board               | Gigabit Ethernet port mapping.                              |
| military_power_supply_module   | battery_backup_module              | Correct power sequencing and charge status monitoring.      |
| flight_recorder                | internal_base_plate                | Mount with shock absorbers for crash survivability.         |
| bonding_strap_kit              | main_chassis                       | Establish robust chassis ground continuity.                 |
| emi_gasket_kit                 | top_cover                          | Beryllium Copper gaskets for EMI sealing effectiveness.     |
| mil_spec_cable_harness         | All Electrical Modules             | MIL-DTL-27500 for robust, shielded internal wiring.         |
| power_distribution_unit        | bulk_decoupling_cap_kit            | Ensure stable power delivery to all downstream components.  |
| sealed_fan_1                   | main_chassis                       | Secure mounting for optimal airflow and IP67 integrity.     |