Abstract
This paper proposes an adaptive backstepping control algorithm for electric braking systems with electromechanical actuators (EMAs). First, the ideal mathematical model of the EMA is established, and the nonlinear factors are analyzed, such as the deformation of the reduction gear. Subsequently, the actual mathematical model of the EMA is rebuilt by combining the ideal model and the nonlinear factors. To realize high performance braking pressure control, the backstepping control method is adopted to address the mismatched uncertainties in the electric braking system, and a radial basis function (RBF) neural network is established to estimate the nonlinear functions in the control system. The experimental results indicate that the proposed braking pressure control strategy can improve the servo performance of the electric braking system. In addition, the hardware-in-loop (HIL) experimental results show that the proposed EMA controller can satisfy the requirements of the aircraft antilock braking systems.
Highlights
With the development of aviation technology, the performance of modern aircraft has greatly improved and the requirement of braking system performance is more stringent [1,2,3,4,5]
According to the characteristics of the actual electromechanical actuators (EMAs) mathematical model, this paper proposes an adaptive backstepping control method that uses an radial basis function (RBF) neural network to approximate and adaptively cancel the unknown parts of the system
The actual mathematical is obtained by reasonably simplifying the nonlinear factors
Summary
With the development of aviation technology, the performance of modern aircraft has greatly improved and the requirement of braking system performance is more stringent [1,2,3,4,5]. The electric braking system is a new type of braking system that uses electromechanical actuators instead of traditional hydraulic actuators. Compared with the hydraulic braking system, the electric braking system has advantages of light weight, small volume, and high reliability which make it the development direction of aircraft braking systems in the future [6,7,8,9]. As a new type of actuator, the electromechanical actuator (EMA) is composed of a motor, reduction gear, and a ball screw. With the development of permanent magnet material technology, the brushless.
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