Slipping Fault Diagnosis and Fault-Tolerant Control for Powershift Tractors Based on the Integration of Model-Based Design and Communication Protocols

Slipping wet clutches are serious issues that can damage the tractor’s transmission system and operational safety. Existing techniques for detecting slipping wet clutches usually only detect whether or not the slipping condition occurs by using thresholds.lacking in the system level integration as well as a realtime fault response capability. In order to address such shortcomings of current systems, we develop an integrated fault diagnosis and fault tolerant control scheme by combining MBD approach with traditional vehicle-to-vehicle communications in this paper. A clutch slip-ratio-based real-time diagnosis model is built in Simulink and the master pressure control andengine torque limitation, and intelligent gear selection for fault severity management and system recovery capability. Additionally, the architecture integrates with SAE J1939 & ISO 14229 standards by utilizing DTCs along with a generic UDS message format to establish feedback mechanism between diagnosis and control actions. The tests conducted at site shows that the proposed algorithm detects slippage due to solenoids with zero false negatives.with the fault tolerant control restoring a safe operation in 0.6 s thus avoiding any transmission damage.In this paper, we propose an efficient and practical method to increase the dependability and resilience of contemporary agricultural machines.