Abstract: An observable micro-nano mechanical testing apparatus and an observable micro-nano mechanical testing method are provided. The apparatus includes a supporting component, a driving component, a bearing component and an imaging component. The driving component and the imaging component are respectively vertically arranged on the supporting component, the bearing component is horizontally arranged on the supporting component and positioned below the driving component and the imaging component, the bearing component is used for bearing a sample and moving the sample, the driving component is used for driving an indenter to apply loads on the sample so as to form an indentation on the sample, and the imaging component is used for observing and analyzing the indentation on the sample.

Abstract: A load control method and a load control system of an indenter based on fuzzy predictive control, are provided. The method includes acquiring an actual measured force value of a sensor and an expected force value of the nth cycle in the loading stage; calculating a first error and a change rate; establishing and optimizing a fuzzy predictive controller; determining movement steps of a motor in the loading stage; acquiring the actual measured value of the sensor and an expected force value of the nth cycle in the full load stage; controlling the movement of the motor; acquiring the actual measured force value of the sensor and an expected force value of the nth cycle in the unloading stage; calculating a third error and a change rate; and determining the movement steps of the motor in the unloading stage.

Abstract: The present disclosure discloses an observable micro-nano mechanical testing apparatus and method. The apparatus includes a supporting component, a driving component, a bearing component and an imaging component. The driving component and the imaging component are respectively vertically arranged on the supporting component, the bearing component is horizontally arranged on the supporting component and positioned below the driving component and the imaging component, the bearing component is used for bearing a sample and moving the sample, the driving component is used for driving an indenter to apply loads on the sample so as to form an indentation on the sample, and the imaging component is used for observing and analyzing the indentation on the sample. Based on the testing method conducted by the testing apparatus in the present disclosure, mechanical property parameters of materials can be effectively measured; the structure is simple; and accuracy of measurement results is high.

Abstract: A load control method of an indenter based on fuzzy predictive control and a system, acquiring the actual measured force value of a sensor in the loading stage; acquiring the expected force value of the nth cycle in the loading stage; calculating a first error and a change rate; establishing and optimizing a fuzzy predictive controller; determining the movement steps of a motor in the loading stage; acquiring the actual measured value of the sensor in the full load stage; acquiring the expected force value of the nth cycle in the full load stage and calculating a second error; controlling the movement of the motor; acquiring the actual measured force value of the sensor in the unloading stage; acquiring the expected force value of the nth cycle in the unloading stage; calculating a third error and a change rate; determining the movement steps of the motor in the unloading stage.

Abstract: The disclosure discloses a micro-nano indentation testing device and method. A lower end of an upright post is fixedly connected to a base, a top support plate is fixedly connected to an upper end of the upright post, a precise pressing device is fixedly connected to the top support plate; a load detection module is fixedly connected to the lower end of the output shaft, an elastic element is sleeved on the output shaft, and two ends of the elastic element respectively press against the precise pressing device and the load detection module; the displacement detection module is fixedly connected to the lower end of the load detection module, an indenter fixer is fixedly connected to the lower end of the displacement detection module and used for fixedly mounting an indenter; and a stage is fixedly connected to the base and used for fixedly mounting a sample.