Hardware-in-the-Loop (HIL) Testing & Validation Services

Reduce development risk before physical systems exist — validate control logic, fault handling and edge cases entirely in simulation.

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WHAT IS HIL?

Validate control software before physical hardware exists

Hardware-in-the-Loop (HIL) simulation runs your actual ECU, VCU, BMS, PLC or motor controller against a real-time simulated model of the physical system it will control, instead of the real hardware. The controller “sees” realistic sensor and actuator signals generated by the simulation and responds exactly as it would in the field — so integration and fault-handling issues surface while the software is still in development, not after a physical prototype has already been built.

TMCS builds these environments on NI VeriStand, PXI, LabVIEW and TestStand, giving engineering teams a validated, closed-loop test platform that runs the real control logic continuously against a real-time plant model — catching problems weeks or months earlier than physical testing alone would allow.

Why Engineering Teams Use HIL

  • Catches integration and fault-handling bugs before a physical prototype exists
  • Safely tests failure conditions too risky to induce on real hardware
  • Runs the actual production control software in a continuous closed loop
  • Cuts prototype dependency and reduces late-stage rework cost
  • Enables fast, repeatable regression testing as control software evolves

Trust & credibility

Trusted by engineering teams building mission-critical systems

TMCS is a leading engineering solutions company specializing in automated testing, simulation, validation, and NI-based engineering platforms. As an NI Certified System Integrator, we help organizations across Automotive, Electric Vehicles, Aerospace, Defence, Industrial Automation, and Energy sectors validate complex embedded systems with confidence.

NI Certified System Integrator

End-to-end HIL system development

Expertise in PXI, LabVIEW & TestStand

Real-time simulation specialists

Custom hardware & software integration

Long-term support & AMC services

How HIL testing works

A structured process to validate control systems before hardware exists

TMCS delivers HIL validation as a five-stage engineering process, from requirement to regression-ready test suite.

01

Define validation requirements

Functional and fault-response requirements mapped against the product specification

02

Build the real-time plant model

Vehicle, motor, actuator and plant behaviour simulated in real time on NI VeriStand

03

Integrate I/O & communication protocols

Controller connected via CAN, CAN FD, LIN and Ethernet exactly as it would be to the real plant

04

Configure & execute closed-loop tests

Fault scenarios programmed and automated closed-loop sequences run in LabVIEW/TestStand

05

Log, analyse & regress

Results captured, trended across builds, and re-run automatically as control software evolves

Why HIL testing matters

Reduce development risks before physical systems exist

Modern vehicles, aircraft, industrial machines, and energy systems depend on increasingly complex software and embedded controllers. Traditional validation methods often rely heavily on physical prototypes, making testing expensive, slow, and difficult to scale.

Aspect Physical Prototype Testing Only HIL Simulation
Testing Stage Testing begins after a physical prototype is available Testing can begin early, before the complete physical prototype is built
Hardware Dependency Requires physical hardware and prototypes for testing Uses real controllers with simulated plant and system behaviour
Test Coverage Limited by hardware availability and physical test conditions Enables repeatable testing across a wide range of operating conditions
Fault Testing Some faults can be difficult, costly, or unsafe to reproduce physically Fault conditions can be simulated safely and repeatedly
Testing Speed Testing cycles can be slow due to hardware setup and configuration Automated scenarios can be executed rapidly and repeatedly
Cost Requires multiple prototypes, test setups, and physical equipment Reduces dependence on repeated physical prototypes and test setups
Repeatability Results can vary due to physical conditions and manual setup Identical test scenarios can be reproduced consistently
Development Cycle Issues may be discovered later during physical testing Issues can be identified earlier, accelerating development and validation

Common engineering challenges

Limited prototype availability

High validation costs

Delayed software verification

Difficult fault testing

Incomplete test coverage

Long development cycles

Non-repeatable testing

Late discovery of software defects

Benefits of HIL testing

Earlier software validation

Reduced prototype dependency

Faster development cycles

Increased test coverage

Automated regression testing

Improved product quality

Lower development costs

Faster time-to-market

Hardware-in-the-Loop testing connects real controller hardware to a real-time simulation environment that accurately replicates actual operating conditions. Engineers can validate functionality, safety logic, communication networks, and fault handling under thousands of scenarios without requiring physical systems.

Related Case Study

Explore our project work in Case Studies

Steering HIL

Validated EPAS/HPAS systems with multi-actuator simulation, delivering accurate, repeatable testing for R&D and production.

Engine VCU HIL

Enabled real-time VCU validation with automated CAN/I/O testing, ensuring reliable and high-performance validation.

HIL for Electric Bus VCU

Enabled repeatable electric-bus VCU testing through real-time drive-cycle and fault simulation, reducing prototype dependency.

HIL Firmware

Automated real-time ECU testing, data logging, and reporting, enabling scalable validation across CAN, LIN, and Ethernet systems.

End-to-end capabilities

Complete hardware-in-the-loop system development

Real-time simulation development

  • Vehicle dynamics models
  • Battery models
  • Motor models
  • Thermal models
  • Inverter models
  • Simulink integration

Controller validation

  • ECU testing
  • VCU testing
  • BMS validation
  • PLC testing
  • Embedded controller testing

Communication testing

  • CAN
  • CAN FD
  • LIN
  • Ethernet
  • J1939
  • Modbus
  • OPC UA

Fault injection system

  • Open circuit faults
  • Short circuit faults
  • Sensor failures
  • CAN bus errors
  • Communication failures

Automated testing & reporting

  • Regression testing
  • Automated test sequences
  • Data logging
  • Report generation
  • Traceability documentation

Technology stack

Built on proven NI technology

NI VeriStand

Real-time simulation and HIL system deployment

NI TestStand

Automated test sequencing and reporting

NI LabVIEW

Custom software development and operator interfaces

CompactRIO

Embedded control and rapid prototyping

PXI & PXIe systems

Modular high-performance validation platforms

High-speed DAQ systems

Precision measurement and monitoring solutions

TMCS, as an NI System Integrator, develops advanced Hardware-in-the-Loop (HIL) systems using NI PXI, CompactRIO (cRIO), LabVIEW Real-Time, and FPGA modules for comprehensive automotive ECU validation. Our platforms simulate real vehicle dynamics to test powertrain ECUs, body electronics, chassis controllers, braking systems, ADAS, and vehicle network communication including CAN, LIN, and Automotive Ethernet. With deterministic real-time processing and closed-loop simulation, we enable fault injection, functional safety validation, and performance verification. TMCS HIL systems reduce development cycles, improve reliability, and ensure production-ready ECU performance before on-road deployment.

TMCS delivers NI-based HIL solutions for Battery Management Systems (BMS), inverters, motor controllers, and EV charging systems using NI PXI, FPGA-based controllers, and LabVIEW software. Our real-time battery and powertrain simulation platforms replicate dynamic load profiles, grid conditions, and fault scenarios to validate SOC/SOH algorithms, protection mechanisms, and power electronics behavior. The system supports high-speed data acquisition, closed-loop testing, and safety-critical validation. Designed for electric vehicle and energy storage development, TMCS HIL solutions accelerate innovation while ensuring compliance with automotive and grid standards.

Leveraging NI PXI, CompactRIO, and LabVIEW FPGA, TMCS builds high-fidelity HIL systems for flight control computers, avionics, UAV controllers, and mission-critical defense electronics. Our platforms provide deterministic real-time simulation of aircraft dynamics, actuator models, and sensor feedback for closed-loop validation. Fault injection, redundancy testing, and safety logic verification are performed in controlled laboratory environments. TMCS HIL solutions help aerospace and defense organizations reduce integration risks, improve reliability, and support certification processes for safety-critical embedded systems.

TMCS provides NI-powered HIL systems for validating PLCs, motion control systems, robotics controllers, and industrial drives. Using CompactRIO, PXI, and LabVIEW Real-Time, we simulate plant models, machine dynamics, and process conditions for closed-loop control validation. Our digital twin-based HIL platforms enable testing of automation logic, safety interlocks, servo performance, and machine sequencing before field deployment. Designed for smart manufacturing environments, TMCS solutions reduce commissioning time, minimize downtime, and improve overall system performance and operational reliability.

TMCS develops advanced HIL solutions using NI PXI and FPGA-based real-time controllers for renewable energy systems, smart grid controllers, and grid-tied inverters. Our platforms simulate grid disturbances, load variations, harmonic conditions, and protection scenarios to validate power electronics and control algorithms. With high-speed data acquisition and deterministic processing, TMCS HIL systems ensure compliance with grid codes and safety standards. These solutions enable safe testing of distributed energy resources and advanced power conversion systems in controlled environments.

TMCS designs NI-based HIL platforms for traction control units, propulsion systems, and safety-critical controllers in railways, marine vessels, and off-highway equipment. Using PXI, CompactRIO, and LabVIEW FPGA, we simulate dynamic operating loads, braking systems, and real-world environmental conditions. The system supports autonomous control validation, redundancy checks, and fault scenario testing in real time. TMCS HIL solutions enhance system durability, reduce field failures, and ensure compliance with transportation safety standards before deployment.

Software Integration

Develop test automation, real-time models, and communication interfaces

Commissioning & Validation

Perform FAT, on-site installation, and system validation

Lifecycle Support

Provide calibration, upgrades, maintenance, and long-term technical support

Requirement Analysis

Define system objectives, ECUs, I/O signals, test scenarios, and real-time constraints

Architecture Design

Design an NI-based HIL architecture aligned with performance needs

System Build

Integrate real-time processors, sensor emulation, load simulation, and fault injection

Related Services & Products

Our Case Studies

Insights into How Our Solutions Deliver Value

Frequently Asked Questions

What is Hardware-in-the-Loop (HIL) testing?
Hardware-in-the-Loop (HIL) testing is a validation method where real controller hardware (such as ECUs, VCUs, BMS, PLCs, or embedded controllers) is connected to a real-time simulation environment. This allows engineers to test software functionality, communication, and fault handling before physical prototypes are available.
Which systems and controllers can be tested using HIL?
HIL platforms can validate a wide range of controllers and systems, including:
  • Vehicle Control Units (VCU)
  • Engine Control Units (ECU)
  • Battery Management Systems (BMS)
  • Motor Controllers
  • Charging Controllers
  • PLCs and Industrial Controllers
  • Aerospace & Defence Control Systems
  • Embedded Electronics and Software
What are the benefits of HIL testing compared to prototype testing?
HIL testing enables earlier software validation, reduces dependence on physical prototypes, improves test coverage, supports fault injection testing, and automates regression testing. This helps engineering teams reduce development costs, identify issues earlier, and accelerate product launches.
Which communication protocols are supported in TMCS HIL systems?
TMCS HIL platforms support industry-standard communication protocols including:
  • CAN
  • CAN FD
  • LIN
  • Ethernet
  • J1939
  • Modbus
  • OPC UA
Additional protocols can also be integrated based on project requirements.
Can TMCS develop a custom HIL system for our application?
Yes. TMCS designs and develops fully customized HIL test benches based on your application, controller architecture, simulation requirements, communication protocols, and validation objectives. Our team provides end-to-end support including system design, software development, integration, commissioning, training, and long-term maintenance.

Ready to De-Risk Your Control System Development?

Request a HIL Feasibility Discussion

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