Abstract
In order to coordinate the damping performance and energy regenerative performance of energy regenerative suspension, this paper proposes a structure of a vehicle semi-active energy regenerative suspension with an electro-hydraulic actuator (EHA). In light of the proposed concept, a specific energy regenerative scheme is designed and a mechanical properties test is carried out. Based on the test results, the parameter identification for the system model is conducted using a recursive least squares algorithm. On the basis of the system principle, the nonlinear model of the semi-active energy regenerative suspension with an EHA is built. Meanwhile, linear-quadratic-Gaussian control strategy of the system is designed. Then, the influence of the main parameters of the EHA on the damping performance and energy regenerative performance of the suspension is analyzed. Finally, the main parameters of the EHA are optimized via the genetic algorithm. The test results show that when a sinusoidal is input at the frequency of 2 Hz and the amplitude of 30 mm, the spring mass acceleration root meam square value of the optimized EHA semi-active energy regenerative suspension is reduced by 22.23% and the energy regenerative power RMS value is increased by 40.51%, which means that while meeting the requirements of vehicle ride comfort and driving safety, the energy regenerative performance is improved significantly.
Highlights
Asuspension system is a key component of a vehicle’s chassis system, and its performance directly determines the ride comfort, operational stability, and driving safety of the vehicle
The test results show that when a sinusoidal is input at the frequency of 2 Hz and the amplitude of 30 mm, the spring mass acceleration root meam square value of the optimized electro-hydraulic actuator (EHA) semi-active energy regenerative suspension is reduced by 22.23% and the energy regenerative power RMS value is increased by
The type of energy regenerative active suspension raised provides a method to solve the above mentioned problems, that is, through the regeneration of a vehicle’s vertical vibration energy caused by an uneven road surface, the heat energy dissipated by the suspension’s shock absorber in the form of friction is transformed into a recyclable power through the energy recovery device, which is used for active suspension active control and utilization, thereby reducing the problem of the large energy consumption of the active suspension [6,7,8]
Summary
Asuspension system is a key component of a vehicle’s chassis system, and its performance directly determines the ride comfort, operational stability, and driving safety of the vehicle. The research on energy regenerative suspension systems is mainly focused on how to improve the efficiency of energy regeneration, while ignoring the original design of the suspension and lacking a coordination analysis of the suspension system’s damping performance and energy regenerative performance [9,10,11]. Algorithms 2018, 11, 12 while ignoring the original design of the suspension and lacking a coordination analysis of the suspension system’s damping performance and energy regenerative performance [9,10,11]. 3.2; and theofnonlinear model energy of the regenerative suspension with an EHA is established
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