Test system of power gearshift controller of tractor

Abstract

The invention provides a test system of a power gearshift controller of a tractor. The test system comprises a PXI real-time system, an electric signal conditioning module, a fault injection module and a computer. The PXI real-time system generates a gearshift control signal according to a test scene, the fault injection module transmits a gearshift control signal injected with fault information to the electric signal conditioning module, the electric signal conditioning module conditions the gearshift control signal injected with fault information and transmits the conditioned signal to the power gearshift controller, the power gearshift controller emits a control instruction and signal and returns the control instruction and signal to the PXI real-time system according to the gearshift control signal and a control strategy of the controller, and a computer carries out analysis according to the gearshift control signal and the control instruction and signal returned from the power gearshift controller to obtain a fault condition test result. The system of the invention can be used to carry out hardware-in-loop fault injection test on the power gearshift controller of the high-horsepower tractor effectively, and a test result can be used to improve the reliability of the power gearshift controller of the tractor.

Description

technical field [0001] The invention relates to the technical field of controller testing, in particular to a testing system for a tractor power shift controller. Background technique [0002] As a big agricultural country, high-horsepower tractors play a pivotal role in my country's agricultural production. With the improvement of the electronic level of tractors, more and more tractors are equipped with power shift controllers. The power shift controller (power shift transmission control unit) is an important part of the electro-hydraulic transmission system. The difference of the control unit is that it can realize gear shifting without power interruption, which is very important for high-horsepower tractors operating at low speed, and can greatly improve the precision of farming. The power shift controller receives instructions from the cab, collects information such as speed at the same time, and drives the electro-hydraulic proportional valve to realize shifting and p...

AI Technical Summary

Problems solved by technology

[0006] 2. High-horsepower power shift tractors have many gears. At present, the mainstream gears are 36 gears, and the gears with higher horsepower can reach 128 gears. Too many gears make modeling difficult;

[0007] 3. The working environment of the tractor is harsh, high temperature, dust, etc., which makes the tractor controller and gearbox more faulty, and fault simulation is difficult

[0010] The disadvantages of the above-mentioned first method for testing the power shift controller of a high-horsepower tractor include: the test cycle of this method is too long and the cost is too high for rapidly updated electronic equipment, and due to the presence of the driver, it is difficult to consider Security, powershift controller cannot be fault injection tested

[0012] The disadvantages of the above-mentioned second method for testing the power shift controller of a high-horsepower tractor include: this method is more suitable for testing hardware equipment such as gearboxes, but it is still difficult to test electronic equipment such as power shift controllers. The cycle is long and the cost is high, and due to the existence of physical gearboxes and other equipment, the fault injection test has disadvantages such as difficult operation and high cost

Images