Rail Loading Simulation via Segmented Actuator Arrays

The patent divides the continuous rail into multiple independent rail segments positioned at different locations. Each segment is equipped with its own actuator that applies load independently. This segmentation allows the system to simulate the moving load effect by sequentially activating actuators along the rail direction, thereby achieving high-speed moving load simulation without requiring a physically large model or high moving speeds.

The patent uses multiple actuators to copy the wheel axle load at different positions along the rail. Instead of physically moving a single load, the system creates multiple copies of the load effect through distributed actuators that apply identical or similar load patterns at different locations and times, simulating the passing wheel axle load.

The patent employs dynamic control of multiple actuators with adjustable timing and amplitude parameters. The actuators can be programmed to apply loads with specific time intervals and force patterns that simulate different wheel axle speeds and loading conditions. This dynamic control capability allows the system to replicate real moving load conditions while maintaining a controlled laboratory environment, thereby achieving both realism and repeatability.

The patent enables variation of key parameters such as load amplitude, time interval between successive loads, and actuator activation sequence. By changing these parameters, the system can simulate different wheel axle speeds, weights, and loading patterns without altering the physical test environment, thus maintaining environmental simplicity while achieving diverse test conditions with high repeatability.

The patent replaces the single rotating eccentric block with multiple distributed actuators along the rail. Each actuator can generate high-frequency vertical excitation independently, and by coordinating their activation timing, the system simulates the moving load effect. This segmentation approach maintains the high excitation frequency capability while adding the mobility feature that the single rotating block cannot provide.

The patent transitions from a single-point excitation system (rotating eccentric block at one location) to a distributed multi-point excitation system. By adding the spatial dimension of multiple actuator positions along the rail and controlling their temporal activation sequence, the system achieves both high-frequency excitation and load mobility, effectively moving the excitation source along the rail direction.

The patent replaces the mechanical forward-reverse loading mechanism with multiple stationary actuators distributed along the rail. Instead of physically moving a single exciter back and forth, the system segments the loading function across multiple fixed actuators that are activated in sequence. This eliminates the mechanical constraints of the forward-reverse mechanism and enables constant high-speed moving load simulation through electronic timing control.

The patent substitutes the mechanical forward-reverse loader system with an electronically controlled actuator array. The mechanical motion of moving a single exciter is replaced by electronic timing control of multiple stationary actuators. This substitution removes the mechanical size and speed limitations of the forward-reverse mechanism while maintaining the moving load simulation capability.