Small-delay numerical control current source circuit for magneto-rheological damper and parameter determination method thereof

Abstract

The invention discloses a small-delay numerical control current source circuit for a magneto-rheological damper of an automobile magneto-rheological semi-active suspension and a parameter determination method thereof. The small-delay numerical control current source circuit comprises a main circuit and a control circuit which are connected. The main circuit is composed of an MOS tube, an adjustable stabilized power supply, a fly-wheel diode, an adjustable resistor, a preset resistor, a preset inductor, a current sensor and a main circuit grounding module. The positive electrode of the adjustable stabilized power supply is sequentially connected with a preset resistor, a preset inductor, a magneto-rheological damper, a current sensor and a drain electrode of an MOS tube. A source electrodeof the MOS tube is grounded through the main circuit grounding module and connected with a negative electrode of the adjustable stabilized power supply, the adjustable resistor and the fly-wheel diodeare sequentially connected between the positive electrode of the adjustable stabilized power supply and the drain electrode of the MOS tube, an anode of the fly-wheel diode is connected with the drain electrode of the MOS tube, and a cathode of the fly-wheel diode is connected with the adjustable resistor. By increasing the preset resistor and the preset inductor, the electrical constant is reduced, and the response speed of the current is increased.

Description

technical field [0001] The invention belongs to the technical field of vehicle dynamics, and relates to a numerically controlled current source circuit structure for a magneto-rheological semi-active suspension of an automobile and a method for determining its parameters. Background technique [0002] In the magnetorheological semi-active suspension of a vehicle, the response speed of the magnetorheological shock absorber is the main factor affecting the overall performance of the suspension. The time lag of the MR damper is mainly the response time lag of the magnetorheological fluid and the current response. The current response time lag refers to the time required for the current to reach the steady state from the transient state. It is determined by the physical characteristics of the rheological fluid and basically cannot be reduced. Therefore, for the control of magneto-rheological dampers, it is usually necessary to reduce the current response time lag. In Wang Xian...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the current time lag problem existing in the magneto-rheological shock absorber in the existing vehicle using the magneto-rheological semi-active suspension, and propose a small-delay numerical control current source circuit for the magnetorheological shock absorber and the circuit The determination method of the main parameters in the method can improve the current response speed of the magneto-rheological shock absorber, reduce the response time lag of the current, and improve the performance of the magnetorheological semi-active suspension

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