Servohydraulic test rig for full static, dynamic, fatigue, and lateral characterisation of railway bogie secondary air springs — compliant with EN 13597, UIC 515, and RDSO type-approval requirements.
Applicable Standards
M-73-ASTS Series
Air springs are the primary secondary suspension element in modern railway bogies — LHB coaches, Vande Bharat Express, Metro, and freight wagons. They must be validated for static stiffness, dynamic stiffness at operating frequencies, lateral compliance, and endurance life before fitment.
The M-73-ASTS is a multi-axis servohydraulic testing system that applies controlled vertical, lateral, and longitudinal loads while maintaining prescribed air pressure inside the specimen. It covers all test modes required by RDSO type-approval and European EN/UIC standards in a single integrated rig.
Capabilities
All test modes required by RDSO type-approval and EN / UIC standards, conducted on a single rig.
Quasi-static vertical, lateral, and longitudinal load-deflection curves to characterise spring rate and operating stiffness at defined inflation pressures.
Sinusoidal excitation at defined frequency and amplitude; computes dynamic stiffness and loss factor in real time for damping characterisation.
Up to 10 million cycles at design load and amplitude. Auto failure detection stops the test and logs the exact cycle count at first sign of bellow failure.
Shear load tests for horizontal compliance per bogie geometry. Measures lateral stiffness under combined vertical preload to simulate real bogie operating conditions.
Stiffness vs. inflation pressure curves across the full operating range, supporting air spring sizing and pressure management strategy development.
Long-duration hold tests under constant deflection or load for rubber bellow and diaphragm material creep characterisation.
Technical Data
| Parameter | Value |
|---|---|
| Vertical Static Load | Up to 300 kN |
| Dynamic Force Capacity | Up to 150 kN (peak sinusoidal) |
| Vertical Stroke | ±250 mm |
| Lateral / Longitudinal Stroke | ±100 mm |
| Frequency Range | 0.01 – 50 Hz |
| Fatigue Stroke Rate | 1 – 10 Hz (typical endurance) |
| Max Fatigue Cycle Count | 10 million cycles |
| Air Pressure Supply (specimen) | 0 – 10 bar, regulated |
| Control Modes | Force, Displacement, Hybrid |
| Load Cell Accuracy | ±0.05% FSR |
| Displacement Measurement | LVDT / Linear Encoder, 0.01 mm resolution |
| Actuator Type | Servohydraulic |
| Power Supply | 3-phase, 415 V, 50 Hz |
Specifications subject to change. Custom capacities and configurations available on request.
Standard Equipment
Closed-loop hydraulic system delivers precise, repeatable force and displacement control across static, dynamic, and fatigue test modes — from quasi-static to 50 Hz.
Independent vertical, lateral, and longitudinal actuators allow combined load conditions that match real bogie operating geometry without re-rigging.
Integrated regulated air supply maintains target inflation pressure in the spring throughout static, dynamic, and endurance tests — 0 to 10 bar.
Load cell, LVDT, and pressure transducer data sampled synchronously; stiffness and loss factor computed and displayed in real time during every test.
Automated test sequencing for all RDSO and EN-mandated test procedures. Reports formatted for RDSO type-approval submission — PDF, Excel, and CSV.
Continuous monitoring of peak force and air pressure; test stops and logs exact cycle count at the first sign of bellow failure during endurance runs.
What's Included
Product Range
After Sales
On-site and in-house calibration of testing machines and sensors
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Application engineering, test method development, and lab planning
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Safe disassembly, transport, and re-commissioning of testing machines
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Modernise legacy or imported test rigs with new controls and sensors
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Annual maintenance contracts (AMC) for all testing machines
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Tell us your spring dimensions, load range, and applicable standard — our engineers will configure the right M-73-ASTS system and quote quickly.
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