Model 320 ePost™ Tire-coupled Road Simulators
Highly efficient and reliable electric 4-posters for a full range of test applications

Benefits» Highly accurate and repeatableperformance» Full range of passenger car andtruck test applications:- Durability- Noise, Vibration, andHarshness (NVH)- Buzz, Squeak, and Rattle (BSR)- Inline Production Quality» Reliable, energy-efficient operation» Compact, portable designs» Low audible noise» Clean, streamlined and safe –minimal facility impact» Low maintenance requirements

To meet growing industry demands forcleaner, quieter and more economical testsystems, MTS offer the Model 320 ePostTM
Tire-coupled Road Simulator, a highly
efficient and reliable electric 4-poster
engineered to deliver a complete rangeof full-vehicle testing capabilities.
Deployed by OEMs around the world,
ePost systems employ four electric
actuators to replicate road profiles andobstacles, providing test engineers witha highly efficient means for subjecting
full-vehicles to real-world conditions incontrolled laboratory environments.
ePost systems combine proprietary MTS
linear electric actuators, versatile FlexTest®
controllers and industry-proven MTS
application software to satisfy a full rangeof passenger car and truck test applications,
including Durability; Noise, Vibration andHarshness (NVH); Buzz, Squeak and Rattle(BSR); and Inline Production Quality.
ePost systems employ new proprietary
MTS-designed ironcore actuators toachieve a more streamlined testing
environment with significantly reduced
operating and maintenance costs relativeto hydraulic simulators.
Electric ePost systems also enable a cleaner
and more eco-friendly testing environment,and are quiet enough for effective BSR andNVH testing. ePost systems can also beintegrated within an environmental chamber
for testing at temperatures ranging from-40°F to 160°F.

Accurate & Reliable Electric Actuation

Model 320 ePost systems feature a patented hybrid actuation designthat integrates linear electric motors, which deliver dynamic force
and motion, with pneumatic cylinders that provide static support.
This scheme enables the ePost to perform a full range of test
applications, including durability, inline production quality, BSR,
and NVH with significantly reduced operating and maintenancecosts relative to hydraulic simulators.
Proprietary MTS ironcore linear electric actuators feature aniron-backed rare-earth magnet assembly that glides througha fixed steel assembly. These liquid-cooled actuators exhibit
relatively high peak forces and are well-suited for rigorous
durability applications. Additionally, MTS engineers havedeveloped an optimized ironcore motor design that effectively
resolves the “cogging” phenomena endemic to the technology,
greatly expanding its application range.

Compact, Streamlined System Design
Model 320 ePost Road Simulators are
powered by an electric drive system, ratherthan a hydraulic power unit (HPU), which
delivers current on-demand for2

significantly higher operating efficiency.
Additionally, the elimination of hydraulicdistribution requirements (pumps, fluid,hoses, accumulators) allows for a cleaner,safer more streamlined test environmentand reduced maintenance needs.

System Configuration

Ethernet LAN (customer)

Wireless Router

Touch-screen Tablet
EStop

System Cables

System Options:» Layout of seismic base» Seismic system integration» X-Y positioning system» Acoustic treatments

FlexTest® Controller & Software

Application
Software Options» RPC® Pro» cRPC Pro» First Road Interact» MTS TestSuite™

Linear Electric Actuators» Ironcore with pneumatic static support and liquid coolingElectric Drive System» Power wiring

Versatile MTS Controls & Easy-to-use Application Software
Model 320 ePost Road Simulators feature modular FlexTest digital
controllers, which are renowned for their scalability, advanced tuning
and compensation tools and intuitive software user interface. ePost
simulators can run a broad selection of MTS application software,
including easy-to-use First Road Interact Production Test Software,
which is designed to support end-of-line vehicle development andproduction quality testing.

First Road Interact Software benefits:Time History Playout» Intuitive, easy-to-use interface» Flexible program inputs with 3
predefined user selectable testinterfaces- Sine Sweep- Random- Time History Playout» Includes portable touch-screen tablet
for test control within and aroundtest vehicle

RandomSine Sweep

3

Model 320 ePost Specifications

MTS ePost Specification1

Units

320e.050

Peak Dynamic Force(peak dynamic force electric only with cooling)kNlbf

429400Continuous Dynamic Force(electric motor only with cooling)kNlbf163600

Continuous Static Force(pneumatic only)kN
lbf

102250Peak Combined Force(peak dynamic force and continuous pneumatic force)kN
lbf

5211700

Continuous Combined Force(continuous dynamic force and continuous static force)kN
lbf

265875Velocity

m/sec
in/sec4157

Strokemmin

25010Actuator Height with Standard Wheelpan

cmin

120.65
47.5

Maximum Acceleration2g30

Digital Encoder Accuracy

μ.005

Noise Level – TypicaldbA

Emergency Stop Method<55MTS SoftStop or HardStop Shutdown

Wheelbase Adjust

Electromagnetic Clamping (60 TONS) Electromechanical Positioning

Bearing Material
Facility Requirements

Air Bearings - Maintenance FreeVA

480
400 @ 460V

Air Supply3PSIBAR
CFM

100
760

Recommended Reaction Masst200

1. Specifications subject to change.
2. 40 kg unsprung mass used for specifications.
3. Air supply system must be adequately sized for continuous operation providing above specified flow at a pressure consistently above 5.2 bar (75 psi).
Note: Higher pneumatic and combined force available on request.

MTS Systems Corporation
14000 Technology Drive
Eden Prairie, MN 55344-2290 USA
Telephone: 1.952.937.4000
Toll Free: 1.800.328.2255
E-mail: info@mts.com
www.mts.com
ISO 9001 Certified QMS

MTS, FlexTest and RPC are registered trademarks and ePost and MTS TestSuite aretrademarks of MTS Systems Corporation in the United States. These trademarks may
be protected in other countries. RTM No. 211177.
Products or company names other than trademarks of MTS Systems are used foridentification purposes only and may be trademarks of their respective owners.
© 2023 MTS Systems Corporation
100-301-051g 320ePost • Printed in U.S.A. • 09/23