A combination of force control and position control loading system and method for strength test of aircraft structure

Abstract

The invention relates to a load test technology and in particular to a load system and method combining force control and position control and used for airplane structural strength tests. The load system combining force control and position control comprises a force control actuator cylinder, a position control actuator cylinder, a force control sensor, a displacement sensor, a control module, load devices used for connection and a load device used for crossing interference pieces. Two ends of the load device used for crossing interference pieces are respectively provided with the load devices used for connection, each load device used for connection is respectively connected with the force control actuator cylinder and the position control actuator cylinder, the force control actuator cylinder is provided with a load module controlling load and the force control sensor, and the position control actuator cylinder is provided with the control module used for control load. The load system and method combining force control and position control controls the force control actuator cylinder and the position control actuator cylinder to respectively perform load on two ends of loading devices according to control commands of load spectrums, the load devices can move along deformation of test pieces, and interference of the load devices and the test pieces during testing process can be avoided.

Description

technical field

[0001] The invention relates to a test loading technology, in particular to a force control and position control combined loading system and method for the strength test of an aircraft structure. Background technique

[0002] In the static / fatigue strength test of full-scale aircraft structures, in the case where the loading equipment needs to span the interfering parts during loading, a combination of active and passive loading methods was used to apply the load, that is, the load of the test piece needs to be applied by a An active loading point where the ram applies the load and a passive loading point where only a connector is used to apply the load. If the deformation of the test piece is large, in the process of applying the load, since the passive loading point cannot follow, the active loading point actuator needs to compensate for the deformation. , which may cause the stroke of the actuator to fail to meet the test requirements, and the collision b...

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