Electric & Hydraulic Power Steering Test Systems | MTS

1. Low-Torque Steering Head Module (steering Input)
2. Power steering pump drive system
3. Power steering fluid temperature conditioning
4. FlexTest Controller
5. User Interface
6. T-Slot Bed Plate
7. Tie Rod Inputs (335: lateral; 337: lateral & vertical)
8. Steering Rack Reaction Fixture
9. Hydraulic Distribution/Accumulation
10. Steering System Test Specimen

	Units	Model 335 (3-Axis)	Model 337 (5-Axis)
Steering Input Assembly
Maximum Steering Input Angle	± deg	1080	1080
Maximum Steering Input Velocity	deg/sec	1200	1200
Maximum Steering Input Torque	Nm	113 (optional 226)	113 (optional 226)
Operation Frequency	Hz	0.1-20	0.1-20
Tie Rod Input Assembly
Tie Rod Input Lateral Stroke	± mm	125	125
1Tie Rod Input Lateral Velocity	mm/sec	350	350
2Tie Rod Input Lateral Force	kN	15	15
Tie Rod Input Lateral Frequency	Hz	0.1-20	0.1-20
Tie Rod Input Vertical Stroke	± mm	N/A	125
Tie Rod Input Vertical Velocity	m/sec	N/A	3
Tie Rod Input Vertical Force	kN	N/A	34
Tie Rod Input Vertical Frequency	Hz	N/A	0.1-50

1. The lateral input velocity can be changed based on unique customer test requirements, changing this parameter requires re-configuring hydraulic supply and distribution components accordingly.
2. The lateral input force can be changed based on unique customer test requirements, typical forces are between 15 and 25 kN peak force

MTS steering test systems feature an innovative, highly sensitive low-torque steering head module optimized for measuring steering effort.

• Integrates the torque sensor, motor and steering wheel angle feedback in a single, compact footprint
• Accurately replicates vehicle input stiffness and inertia, enabling realistic tests with extremely high-resolution measurement at very low torque magnitudes:
  • 113 Nm with resolution of  0.00001347 Nm,  Noise floor of +/- 0.004 Nm
  • 226 Nm with resolution of  0.00002694 Nm, Noise floor of +/- 0.008 Nm 
• Six-axis positioner that enables test engineers to match vehicle geometries exactly.
• Hand wheel can be engaged at any time during testing
• Steering inputs can be applied at the rack, I-shaft connection point or steering column input
• Also suitable for traditional durability steer tests

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• Steering column reaction fixture
• Specimen fixturing
• Power steering pump drive system
• Power steering fluid temperature conditioning
• EPS power panel
• Additional data acquisition capability
• Specimen Transducers (force, displacement, temperature, pressure, current, etc)
• Vehicle Bus / ECU Integration
• Environmental Chamber and Conditioner
• Facility and peripheral items
• Mechanical Hardware-in-the-Loop (mHIL) integration
• More available upon request

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