A six-degree-of-freedom vibration excitation system with four-stage stewart mechanism in parallel configuration

Abstract

The invention discloses a four-stage Stewart mechanism parallel configuration six-degree-of-freedom vibration excitation system, which adopts a four-stage Stewart mechanism six-degree-of-freedom parallel configuration, including twenty-four actuator branches, multiple air spring branches, Multiple auxiliary support branches, upper platform components, lower platform components and real-time control hardware system; the upper and lower platform components are connected by 24 actuator branches, air spring branches, and auxiliary support branches; each operating The actuator branch is composed of a linear moving magnet motor, a hinge assembly and an adapter; each air spring branch is composed of an air spring and an adapter; each auxiliary support branch is composed of a threaded screw lift and an adapter; real-time control The hardware system obtains the six-degree-of-freedom displacement and acceleration signals of the upper platform collected by the sensor through A / D sampling, and calculates the control signal; the control signal is output to the power amplifier through the D / A, and drives the actuator to output axial movement, pushing the upper platform to generate Desired six-degree-of-freedom vibration excitation signal.

Description

technical field [0001] The invention belongs to the field of vibration control of intelligent parallel mechanisms, in particular to a four-stage Stewart mechanism parallel configuration six-degree-of-freedom vibration excitation system, which can be used to simulate vibration signals received by precision instruments in various environments. Background technique [0002] High-precision loads, precision instruments, etc. are inevitably disturbed by mechanical vibration from the carrier itself or the outside world during the execution of tasks, and present the characteristics of multi-degree-of-freedom line-angle vibration coupling, high-frequency and low-frequency vibration coexistence, etc., which greatly affect Therefore, it is of great engineering significance to test the working state of the equipment under the multi-degree-of-freedom complex vibration interference and to debug it in the laboratory (inner field) environment. [0003] The typical equipment used to provide ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to propose a new six-degree-of-freedom vibration excitation system for a single-degree-of-freedom vibration table that is difficult to meet the test requirements of multi-degree-of-freedom vibration simulation, which can be used to simultaneously simulate vibration signals with up to six degrees of freedom. Provide multi-degree-of-freedom vibration excitations for test pieces (high-precision loads, precision instruments, etc.) Control accuracy, or perform functional performance testing and calibration, etc.

Images