Inertial parameter measurement platform and method based on frequency response function mass line

Abstract

The invention discloses an inertial parameter measurement platform and method based on a frequency response function mass line. The platform comprises a support frame, a balance platform, three-axis acceleration sensors, a force hammer, a data collector and a display device, wherein the balance platform is suspended in the support frame through a flexible rope in a level water manner, a to-be-measured structural member is placed on the balance platform, the multiple three-axis acceleration sensors are respectively arranged on the to-be-measured structural member according to measurement requirements, the force hammer is used for applying excitation to the to-be-measured structural member, the three-axis acceleration sensors and the force hammer are respectively connected with the data collector through data lines, and the data collector is also connected with the display device and is used for displaying collected data. According to the invention, the platform is simple in balance adjustment operation and can be disassembled and expanded automatically; and coordinates of an excitation point and a response point can be accurately measured by means of geometric parameters of a measurement platform, repeated measurement of a three-dimensional coordinatograph is not needed, inertial parameters and errors of an experimental platform can be known, and measurement accuracy can be improved when inertial parameters of a to-be-measured component are calculated.

Description

technical field [0001] The invention relates to the technical field of inertial parameter measurement of complex component rigid bodies, in particular to an inertial parameter measurement platform and method based on frequency response function mass lines. Background technique [0002] Efficient, convenient and accurate acquisition of rigid body inertia parameters of complex components such as automobiles, aviation and aerospace has always been a hot and difficult research point in the field of mechanical manufacturing. Inertial parameters of complex components include mass, center of mass, moment of inertia, and product of inertia. Generally, when conducting mass line method experiments, a test bench is directly used to measure the inertial parameters of the component to be tested with soft ropes or flexible supports, and the coordinates of the excitation point and the response point are measured by an expensive three-dimensional coordinate instrument, ignoring the influenc...

AI Technical Summary

Problems solved by technology

Generally, when conducting mass line method experiments, a test bench is directly used to measure the inertial parameters of the component to be measured with soft ropes or flexible supports, and the coordinates of the excitation point and the response point are measured by an expensive three-dimensional coordinate instrument, ignoring the influence of unbalanced force on each flexible rope Experimental result factors, ignoring the error impact of the experimental test platform on the measurement results, resulting in a relatively cumbersome measurement process, high cost, low efficiency, and poor accuracy

Images