Coordinated Design Method for Structure and Control Parameters of Two-stage Damper Active Suspension
A technology of active suspension and secondary vibration reduction, which is applied in the direction of suspension, elastic suspension, vehicle components, etc., and can solve the problems of inapplicability
Active Publication Date: 2021-09-10
JIANGSU UNIV
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[0004] Although genetic algorithm, ant colony algorithm, or particle swarm algorithm can be used to optimize multiple parameters to obtain the minimum overall performance value of the suspension, these methods are not suitable for ensuring the minimum overall performance value of the suspension while ensuring other indicators do not exceed specific limits
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[0025] see figure 1 , the two-stage damping active suspension is modified by adding a bushing spring 8 to the ordinary suspension. The wheel mass 2, sprung mass 4, tire stiffness, and suspension stiffness are obtained by referring to the prototype passive suspension, which is the known parameter. The mechanical properties of the actuator 6 are obtained from bench tests, and the equivalent inertial mass of the actuator 6 and the Coulomb damping force of the actuator 6 are also known parameters. The equivalent stiffness k of the newly added bushing spring 8 of the two-stage damping active suspension c , the equivalent viscous damping c of bushing spring 8 c These two suspension structure parameters, therefore, need to design these two new suspension structure parameters.
[0026] Under the specific working capacity of the actuator 6, the bushing spring 8 reduces the overall performance index of the suspension by reducing the required electromagnetic control force amplitude of...
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The invention discloses a method for coordinating the structure and control parameters of a two-stage shock-absorbing active suspension in the field of vehicle suspension, and constructs a dynamic model and a state space equation of the two-stage shock-absorbing active suspension, expressed by a state vector H without ideal control force soft constraint parameters 2 Index equation, in H 2 Add 1 control force soft constraint to the index equation to form H containing ideal control force soft constraint parameters 2 Index equation, establish the comprehensive performance index function of the suspension, obtain the wheel acceleration and sprung mass acceleration as the output equation, calculate the overall control matrix, and construct the optimization objective function. When the objective function is at the minimum value, the equivalent of the corresponding bushing spring The values of the two structural parameters of stiffness, equivalent viscous damping of the bushing spring and the control parameters are the coordinated optimization design values, which are obtained under the condition that the ideal electromagnetic control force and the disturbance of the bushing spring are constrained by their respective upper limits The minimum comprehensive performance index value of the suspension.
Description
technical field [0001] The invention belongs to the technical field of vehicle suspension, and in particular relates to a method for coordinating and optimizing the structure and control parameters of a secondary vibration-damping active suspension. Background technique [0002] In order to deal with the problem that the equivalent inertial mass of the rotary motor actuator is too large, a Chinese patent application number 201810431986.6, titled "An Active Suspension with Helical Springs and Rubber Springs with Different Axis Centers", proposed a different Axial two-stage damping active suspension structure, its principle is as follows figure 1 As shown, when the suspension spring 3 and the actuator 6 are installed off-axis, a bushing spring 8 is used between the actuator 6 and the wheel to add a first-stage damping structure, and in the vertical direction (related to the suspension movement The directions of all physical quantities are in the vertical direction), the wheel...
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IPC IPC(8): B60G17/018
CPCB60G17/018B60G2600/1871
Inventor 陈士安蒋旭东姚明仝嘉成
Owner JIANGSU UNIV