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Ontario Tech acknowledges the lands and people of the Mississaugas of Scugog Island First Nation.

We are thankful to be welcome on these lands in friendship. The lands we are situated on are covered by the Williams Treaties and are the traditional territory of the Mississaugas, a branch of the greater Anishinaabeg Nation, including Algonquin, Ojibway, Odawa and Pottawatomi. These lands remain home to many Indigenous nations and peoples.

We acknowledge this land out of respect for the Indigenous nations who have cared for Turtle Island, also called North America, from before the arrival of settler peoples until this day. Most importantly, we acknowledge that the history of these lands has been tainted by poor treatment and a lack of friendship with the First Nations who call them home.

This history is something we are all affected by because we are all treaty people in Canada. We all have a shared history to reflect on, and each of us is affected by this history in different ways. Our past defines our present, but if we move forward as friends and allies, then it does not have to define our future.

Learn more about Indigenous Education and Cultural Services

Climatic Four-Poster Shaker

The four-poster shaker encompasses a traditional four-poster design situated in a fully climatic chamber. It tests products with four single-axis vertical actuators that move in an up-and-down motion. It can be programmed to simulate any condition such as a gravel road, high-velocity pot holes or jarring drop simulations. In addition, the room has climatic capabilities, with temperatures ranging from -40˚C to +60˚C and five per cent to 95 per cent relative humidity.


Although the four-poster was designed primarily for automotive use, it can be utilized for a wide range of industries due to its climatic capabilities. Sectors include:

  • agricultural vehicles
  • automotive
  • construction vehicles
  • defense
  • human performance
  • motorcycles
  • motorsport
  • scooters
  • unmanned aerial vehicles (UAVs)

Testing examples

Suspension (durability and life cycle) can be tested under different surface simulations, such as gravel roads or pot holes. Suspension optimization is available for motorsports to optimize ride comfort, while structural and squeak-and-rattle tests ensure product quality.

4-Poster Shaker Close-Up   NASCAR Suspension Testing

Key features 

  • Drive-on post feature with automatic positioning system.
  • Temperatures ranging from -40°C to +60°C and relative humidity ranging from five per cent to 95 per cent.
  • Dual modes: Road-load simulation and high-flow, high-G.
  • Complete suite of ancillary systems for customer vehicle operation.
4-Poster Control Room   Close Up Of Truck

Test section features 

Overall dimensions:

  • Length: 8.3 metres
  • Width: 7.2 metres
  • Height: 5.6 metres

Vehicle entry clearance

  • Width: 4.26 metres
  • Height: 4.49 metres

Drive-on wheel pans

Remotely adjustable track and wheelbase

Exhaust extraction system



Man-down pull cord

In-chamber power

Outlets for plug-in vehicles

Prius on 4-Poster  Prius On 4-Poster

Thermal performance specifications 

Thermal Performance Specifications

Other performance (measured):

  • Maximum cooling rate: +60°C to -40°C in six hours.
  • Temperature uniformity: σ ≤ 1.05 °C over the entire temperature range -40°C to +60°C.
  • Temperature stability: σ = 0.28°C over the entire temperature range -40°C to +60°C.

Four-poster shaker specifications 

Manufacturer and model

MTS 248.05

Control system

Flextest GT with 793 system software

Simulation software

MTS RPC Pro software

Actuator force


Servovalve flow


Vehicle types

Passenger car, light-duty trucks

Track range

1,270 mm to 2,110 mm

Wheelbase range

1,572 mm to 4,572 mm

Vehicle weight

4500 kg

Range of motion

+/- 150 mm

Frequency response

0.5Hz to 50Hz

Maximum acceleration

19.5 g to 100 g (depending on moving mass)

Maximum velocity

5 m/s