A Model-Assisted Reduced-Order ESO Based Cascade Controller for Sensorless Control of Independent Gear-Shifting Actuators

Abstract

Independent gear-shifting actuation systems, which are based on linear electromagnetic actuators (LEMAs), have tremendous potential to minimize the shifting duration of automated mechanical transmission (AMT). A velocity estimator based on the measurements of current is designed to achieve sensorless control of the actuator by using only electrical subsystem, thus avoiding the use of a complete system model that contains mechanical uncertainties. The elimination of the position sensor simplifies the structure of the gear-shifting system and reduces the manufacturing cost. To enhance the robustness of the position control, model-assisted reduced-order extended state observer (ESO) based cascade controller is constructed, which take parameter uncertainties and external load force as the lumped disturbance to observe and compensate them dynamically. Finally, simulation and experimental results are shown to demonstrate the effectiveness of the proposed velocity estimator and control method.

An improved adaptive position tracking strategy for automatic shift actuator with uncertain parameters

“…Long shifting time will deteriorate the quality of the shift gear. In 26 , to minimize the shifting time, a position control system was devised on the basis of model assisted reduced order for the linear electromagnetic gear-shifting actuator. In 27 , a feedback control strategy was proposed for an AMT system, in which the output of the controller could be accelerated by selecting maximum value or zero in order to control the shifting time.…”

Friction Coefficient Compensation Control in Synchronizer Synchronization Process for Transmission

“…A lot of basic research has been proposed to improve shift control accuracy [3,4]. The temperature changing regularities of the friction surface under different working conditions were analyzed by simulation and experiment [5,6].…”