Kelude Heavy Industry Crane R&D Testing Capabilities Revealed
Two Decades of Engineering Expertise, Three Test Platforms: Kelude Heavy Industry's Crane R&D and Testing Capabilities Revealed. As China's crane industry advances toward intelligent, high-end solutions, R&D and testing capabilities have become the definitive benchmark of a manufacturer's core technological strength.
As China's crane industry advances toward intelligent, high-end solutions, R&D and testing capabilities have become the definitive benchmark of a manufacturer's core technological strength. Kelude Heavy Industry, a technology-driven enterprise with over two decades of experience in lifting equipment, is opening the doors to its three core test platforms for the first time: the Structural Fatigue and Vibration Test Platform, the Electrical and Control System Hardware-in-the-Loop (HIL) Simulation Platform, and the Full-Machine Load and Reliability Test Site. Together, these platforms cover the entire R&D testing chain—from material-level and component-level assessments to full-machine validation—and form the infrastructure underpinning Kelude's competitive edge in reliability, longevity, and intelligent crane technology.
Structural Fatigue and Vibration Testing: Building Durability into Every Frame
Testing Capabilities and Industry Impact
This platform has accelerated Kelude's electrical system testing efficiency by more than 10 times. Traditional testing, which relies on full-machine commissioning, requires 3–5 days per electrical system validation and is constrained by weather and site conditions. The HIL platform compresses this cycle to just 4–6 hours and operates 24/7 without interruption.
Fault injection is a standout feature of this platform. Simulating a VFD communication failure on a physical crane requires manually disconnecting wires, exposing both equipment and personnel to safety risks. On the HIL platform, the same fault can be injected in milliseconds with zero risk. To date, Kelude has executed over 20,000 automated test cases on this platform, covering the full operational lifecycle of crane electrical systems—from power-on self-checks and normal operation to emergency shutdown scenarios.
At the industry level, this capability positions Kelude as one of the few crane manufacturers in China with dSPACE-grade HIL testing proficiency. This directly supports rapid iteration in Kelude's Smart Crane development—from functional validation of PLC Control programs and parameter tuning of advanced Anti-sway algorithms to communication protocol testing for Remote Monitoring systems—all thoroughly verified on the HIL platform before deployment to physical equipment.
Full-Machine Load and Reliability Testing: Proven Under Fire
Platform Overview
The Full-Machine Load and Reliability Test Site is the final validation stage in Kelude's testing framework. This outdoor facility spans over 8,000 square meters and features a 50-meter Span heavy-duty test line, a 200% overload test zone, an environmental aging chamber for simulating harsh weather conditions, and a round-the-clock data acquisition system. Every new Kelude crane model must complete a minimum of 500 hours of full-machine reliability assessment here before delivery.
Core Equipment and Parameters
| Equipment/Facility | Technical Parameters | Application |
|---|---|---|
| Heavy-dutyTestLine | Span50m;Effective Length120m;track accuracy±2mm/m;Rated Capacity320t | CompletedcraneComplete Machinetraveling,Hoisting / Lifting,Slewing,LuffingFour MajormechanismOveralloperating conditionsCommissioningTest |
| 200%dynamic loadTestingSystem | CounterweightLoading Method;overloadCoefficient1.0~2.5Adjustable;DynamicLoadAccuracy±1% | In accordance withFEM 1.001《crane test specification and procedures》Executestatic loadanddynamic loadOverload Test,Verify Complete Machinesafety margin |
| AcceleratedAgingEnvironmental Chamber | Temperature Range-40℃~+85℃;Humidity Range10%~98%RH;Salt Spray/UV/Sand/Dust (Optional) | SimulatecraneOutdoorlife cycleClimate Exposure,Accelerated Verification of Electrical Components andcoating systemofenvironmental adaptability |
| data acquisitionand Analysis System | 256access systemSynchronizationAcquisition;Sampling Rate1kHz;SupportStress/Displacement/Plusspeed/Temperature/CurrentTorqueMulti-ParameterFusion | OverallTestPeriodic Continuous Recording of Equipment Status Data,Automatic GenerationreliabilityAnalysis Report and Weak PointsIdentification |
Testing Capabilities and Industry Significance
The defining feature of the complete machine test site is its commitment to "real-world operating conditions and extreme performance assessment." The heavy-duty test line with a 50-meter span is one of the few infrastructure assets in China's crane industry capable of full-machine testing for large-tonnage bridge and gantry cranes. With a 200% dynamic load testing capability, Kelude can safely push cranes to twice their rated load for assessment—a testing intensity far exceeding the industry-standard 125%–140% range.
Accelerated aging testing is a signature capability at Kelude. By subjecting crane electrical control systems, motors, brakes, and other components to cyclic environments ranging from -40°C to +85°C, combined with salt spray and UV radiation, the company can simulate 5–8 years of outdoor natural aging in just three months. This testing ensures long-term stable operation of Kelude cranes in extreme environments such as wind farms in the northwest, humid port terminals in the south, and frigid workshops in the north.
In terms of reliability indicators, Kelude's systematic testing protocols have raised the mean time between failures (MTBF) for its cranes from the industry average of 2,500 hours to over 5,000 hours. During the cumulative 500-hour reliability test required for each new model, any design defect discovered mandates a complete rectification followed by a restart of the full 500-hour countdown. This "zero-tolerance" policy ensures that products reaching the market possess a sufficient level of maturity.
From Lab to Field: The Closed-Loop Value of the Testing System
These three major platforms do not operate in isolation; together they form Kelude's three-tier R&D testing loop: "simulation → component → complete machine." Strain data from the structural fatigue testing platform feeds back into the load models of the electrical simulation platform, and control strategies validated on the simulation platform are then applied to real equipment at the complete machine test site. The data flow across these three platforms creates a complete product quality traceability chain.
Behind this system lies two decades of sustained technical investment from Kelude. From establishing the first materials mechanics laboratory in 2005, to introducing the first electro-hydraulic servo fatigue equipment in 2014, to building the dSPACE HIL platform in 2019 and completing the upgrade of the complete machine test site in 2022—each investment has corresponded to tangible improvements in product reliability. According to statistics from Kelude's Technology Center, since these three platforms became operational, on-site commissioning cycles for new product development have been shortened by 60%, early-stage failure rates have dropped by 75%, and customer complaint rates have decreased by 82%.
Against the broader industry shift toward Smart Manufacturing, Kelude's decision to publicly unveil its three major testing platforms is both a confident demonstration of its R&D capabilities and a pragmatic step toward raising industry testing standards. As crane safety standards continue to tighten—such as the revision of ISO 4301 and updates to the ISO 4301 series—systematic R&D testing capabilities will transition from a "competitive advantage" to a "market entry requirement." Built on twenty years of technical expertise, Kelude uses its three testing platforms to back the reliability of every crane it delivers—this is the most fundamental quality commitment of China's heavy equipment manufacturing industry.
FAQ
Q: What sizes of crane components can Kelude's 1000kN electro-hydraulic servo fatigue testing machine test?
The 1000kN (approximately 100 ton-force) loading capacity is sufficient to cover the fatigue testing needs for main girders and end carriages of Kelude's mainstream bridge and gantry cranes. Per the design specification, this testing machine can be used to evaluate the fatigue characteristics of main girders for cranes with a rated lifting capacity of up to 50t, as well as smaller components and welded joint specimens from larger tonnage cranes. For full-scale main girder testing of extra-large cranes (e.g., the 200t class), the test site is equipped with higher-capacity static loading systems and on-site strain measurement solutions.
Q: What is the difference between HIL simulation and traditional software simulation?
In traditional software simulation (MIL/SIL), both the controller model and the plant model run entirely on a computer, making it impossible to verify the reliability of real controller hardware and low-level driver code. HIL simulation, by contrast, connects the actual crane controller (PLC, motion controller, VFD) into the simulation environment. The device under test is real physical hardware, while the simulation environment only emulates the external physical world—motors, sensors, loads, and so on. This approach can expose hardware faults, firmware bugs, communication latency, and electromagnetic compatibility defects that pure software simulation cannot detect. For safety-critical crane control systems, HIL testing is an indispensable verification method that software simulation cannot replace.
Q: Is the 200% dynamic load test at the complete machine test site safe? How often is this test performed?
The 200% dynamic load test is conducted under strict safety control procedures. The test area is equipped with physical isolation barriers and multiple emergency stop systems. All personnel remain at a safe distance during testing, with loading operations executed from a remote control room. The test follows a stepped loading strategy: increasing progressively from 125% → 150% → 175% → 200%, with structural verification at each level before proceeding to the next. This test is not part of routine Factory Acceptance Testing for every unit—it is a design type test, performed 1–2 times during the R&D and design finalization phase of each new model. Mass-produced units undergo standard factory testing per FEM 1.001, which includes 125% static load and 110% dynamic load tests.
Q: How does accelerated aging testing ensure correlation with real-world operating environments?
Kelude's accelerated aging test protocols reference the GB/T 2423 series of standards for environmental testing of electrical and electronic products, as well as ISO 9227, the salt spray test standard for artificial atmosphere corrosion testing. The correlation between test conditions and real-world environments is built on long-term data accumulation: Kelude's Technology Center has deployed over 60 long-term monitoring points on in-service equipment across four representative climate zones in China—North, East, South, and Southwest—collecting environmental exposure data continuously for more than five years. Based on this measured data, acceleration factor models (Arrhenius and Peck models) have been established to ensure a reliable conversion relationship between laboratory accelerated aging and actual environmental exposure. Currently, the prediction error of the accelerated aging model is controlled within ±15%.
