Abstract
Loading system is the core system of multi-functional engineering machinery as load vehicle to test traction performance of construction vehicle. For secondary regulation technology in loading system of multifunctional test platform, the mathematical models of electro-hydraulic servo valve, variable fuel tanks, secondary component were established by modeling method for the secondarily regulated loading system. By using the PID controller to adjust the parameters, mainly from step loading model and sine wave loading model to analysis the simulation. Studying on dynamic characteristics and reliability of the secondary regulation technology system for loading control system of test-platform. The results show that the construction machinery multi-function test-platform uses the secondary regulation technology system is feasible, the secondary regulation technology can meet the performance requirements of the loading system.
Highlights
In order to study the construction vehicle traction performance, in the laboratory soil tests, usually using simulated loading trucks on the tractor, to reproduce the load during towing operations
Traction load imposed by vehicles controlled by secondary regulated loading system, the running wheels of load car are driven by the secondary component, when the system loads, the Secondary component impose a load torque shaft to the test platform
The literature studies have shown that construction vehicle traction load is often volatile, and its dominant frequency is generally less than 6Hz (Yao, Huai-xin, 2002), so secondary regulated loading system should meet this requirement, and has a degree of stability nature, it is necessary to study the dynamic characteristics of hydrostatic secondary regulated loading system
Summary
In order to study the construction vehicle traction performance, in the laboratory soil tests, usually using simulated loading trucks on the tractor, to reproduce the load during towing operations. Traction load imposed by vehicles controlled by secondary regulated loading system, the running wheels of load car are driven by the secondary component, when the system loads, the Secondary component impose a load torque shaft to the test platform. The literature studies have shown that construction vehicle traction load is often volatile, and its dominant frequency is generally less than 6Hz (Yao, Huai-xin, 2002), so secondary regulated loading system should meet this requirement, and has a degree of stability nature, it is necessary to study the dynamic characteristics of hydrostatic secondary regulated loading system
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