---
title: "Feedback Device (e.g., LVDT)"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:FEEDBACK_DEVICE_E_G_LVDT"
  data_integrity_hash: "20dc36b308f5b5d78836a5ae9f24ec8c"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:FEEDBACK_DEVICE_E_G_LVDT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/feedback-device-e-g-lvdt.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/feedback-device-e-g-lvdt"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-10 VDC output for ±0.5 mm spool displacement"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.1
    unit: "VDC"
    consequence: "Core material hysteresis exceeding 0.05% FS due to magnetic saturation at 1.2 T flux density"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Coil insulation breakdown at 150°C thermal limit"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Class H (180°C) polyimide-nomex composite insulation with 500 VAC hipot rating"
  - node_2:
      trigger: "Armature misalignment &gt;50 μm from mechanical shock"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Three-point kinematic mounting with 60 HRC hardened steel bearings"
bom_nodes:
  movable-core:
    type: "component"
    urn: "URN:CNFX:ME:MOVABLE_CORE"
    interface_type: "physical-logic-coupled"
  primary-coil:
    type: "component"
    urn: "URN:CNFX:ME:PRIMARY_COIL"
    interface_type: "physical-logic-coupled"
  secondary-coils:
    type: "component"
    urn: "URN:CNFX:ME:SECONDARY_COILS"
    interface_type: "physical-logic-coupled"
  bobbin:
    type: "component"
    urn: "URN:CNFX:ME:BOBBIN"
    interface_type: "physical-logic-coupled"
  housing:
    type: "component"
    urn: "URN:CNFX:ME:HOUSING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/feedback-device-e-g-lvdt.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "772c6a3d587cd83ddfbda083e7a2578a8b730ddf7a800222d985ed13476d1d9f"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Feedback Device (e.g., LVDT)

## 1. Technical Definition
A sensor component in servo valves that provides real-time position feedback of the valve spool to the control system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-10 VDC output for ±0.5 mm spool displacement**. Failure boundary: **Output voltage deviation &gt;±0.1 VDC from calibrated linearity curve**, Mechanism: **Core material hysteresis exceeding 0.05% FS due to magnetic saturation at 1.2 T flux density**.

### 2.1 Analytical Physics Model
Governed by the **Combined Measurement Uncertainty**:

> **Primary Equation**: $u_c = \sqrt{\sum u_i^2}$  
> **Engineering Impact**: Defines the precision confidence interval for inspection.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| u_i | Standard Uncertainty components | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Coil insulation breakdown at 150°C thermal limit | 8 | Primary-secondary winding short circuit | Class H (180°C) polyimide-nomex composite insulation with 500 VAC hipot rating |
| Armature misalignment &gt;50 μm from mechanical shock | 8 | Non-linear output with 2% FS null shift | Three-point kinematic mounting with 60 HRC hardened steel bearings |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Signal Conditioner**, **Calibration Fixture**, **Test Bench with Motion Simulator**  
**Downstream Applications**: Servo Valves, Hydraulic Actuators, Precision Motion Control Systems  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the primary function of this feedback device in servo valves?
**A**: This LVDT feedback device provides real-time position feedback of the valve spool to the control system, enabling precise servo valve operation in machinery and equipment manufacturing applications.

### Q: What materials ensure durability in industrial environments?
**A**: The device features an electrical steel core for magnetic efficiency, copper windings for conductivity, epoxy/phenolic insulation for protection, and stainless steel housing for corrosion resistance in demanding industrial settings.

### Q: How does this component integrate with servo valve control systems?
**A**: The movable core connects to the valve spool while primary and secondary coils on the bobbin generate position signals that interface directly with PLCs or controllers for closed-loop feedback in machinery automation systems.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Feedback Device (e.g., LVDT)](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/feedback-device-e-g-lvdt)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: FEEDBACK_DEVICE_E_G_LVDT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 8f232d28
