The KL2706 chassis adopts a compact cabinet design. The front panel is mainly equipped with indicator lights and communication interfaces, and the rear panel is mainly equipped with input and output interfaces. It integrates a large number of electrical fault types into a box body to avoid user external complex lines. It can be used independently or in conjunction with hardware in a loop test system for automatic testing of fault simulation in a real-time environment.

HIL hardware in the ring test system IO signals can be transferred to the tested controller through the fault injection box. Each signal through the fault injection box can be set with different types of failures. The failure can be set manually through the supporting superior computer fault injection software. The upper computer software supports the import of. XML format fault injection lists to facilitate users to save reading and ensure repeatability of testing.

Figure 1 Diagram of Application of Fault Injection Box

KeLiang KL2706 fault injection box control section uses the STM32 MCU. The electric part uses fault bus and distributed relay to realize complex coupling electrical fault types.

Form 1 Functional Specification for Fault Injection Boxes

Typical Application of Fault Injection Box：

Ø  Diagnostic function debugging

Ø  Testing in virtual real-time testing environment, such as HIL hardware in loop system

Ø  Can be manually operated by the host computer software

Ø  Composite fault design using Simulink module

Automatically run with other automation tools

Fault injection box main function：

Ø  Real-time fault simulation

Ø  18 high current channels and 48 low current channels.

Ø  Connection Loose Simulation

Ø  API for system integration

Ø  Automatic test configuration

Ø  CAN and Ethernet communication interface for analog control

Ø  Master / From Cascade Mode, Extended Channel

Type of failure support：

Ø  Short circuit to the ground or to the power supply

Ø  Needle-to-pin malfunction

Ø  Disconnect cable

Ø  Electricity leakage

Ø  Other land or power short-circuit and cable disconnections