The Clutch Control In The Starting-up Process For AMT Vehicles

With the enhancement of life qualities, vehicle has become an essential tool in ourdaily life. The emergence of the Automated Manual Transmission (AMT) has signifcantlylowered the driving difculty. However, due to the vehicle powertrain’s high nonlinearity(e.g., resistance and actuator) and uncertainty (e.g., vehicle quality and road gradient),there are still numerous questions concerning the control process to be investigated. Thestarting-up process is not only basic and critical to driving, but also the most directreflection of vehicle qualities. In addition, performance indexes such as fuel economy anddriving comfortability also relate closely to the process.Thus, attempting to acquire better performance indexes, I choose the control problemof starting-up process as the research topic. Firstly, based on the investigation of the thestarting-up process, I set up the dynamic model of the process. Secondly, I systematicallyreview the composition of the vehicle powertrain system, apply the AMSim software tobuild the simulation model with5-speed, and employed the trial vehicle of the laboratory,I set up the components’ parameters of the simulation model according to real vehicledata, and test the model functionally to prove that the model could be applied to simulatethe vehicle starting-up process.Thirdly, I analyze the required clutch performance in the starting-up process, calcu-late the quantized requirements, and design the control system. The core of the controlsystem I introduce is the Active Disturbance Rejection Control (ADRC) algorithm, whichdoes not require a precise mathematical model, but concentrates on the dealing of the un-certainties inside and outside of the system, exactly being capable of meeting the controlrequirements of the research topic, e.g., externally numerous interferences and internal-ly signifcant parameter fluctuations. Then, based on PID algorithm, I accomplish theposition tracking control of the clutch actuator. Afterwards, I employ multiple workingconditions to test the ofine efectiveness of the designed control system.Finally, after the rapid prototyping experiment as the real-time validation of thesystem, I conduct the real vehicle experiment, in which the controller runs in the MicroAutobox of dSPACE, real-time data is collected through CAN and AD-DA, using the drive circuit to drive the actuator to engage the clutch, to test the performance of thecontrol system under multiple working conditions. Results of real vehicle tests indicatedthat the designed system can efectively and reliably accomplish the clutch control in thestarting-up process.