Abstract: A damping control method for a lower-limb prosthesis, comprising the following steps: isolate the driving motor of the lower-limb prosthesis from the driving voltage; the driving motor is driven to rotate by the force that results from locomotion of a human's CoM (Center of Mass), and generates an alternating induced voltage, when the driving motor behaves as a generator; connect output terminals of the driving motor with a full-bridge rectification circuit that is made of Schottky diodes to transform the alternating induced voltage to a direct-current voltage; connect the output terminals of the full-bridge rectification circuit with a controlled switch to form a closed circuit, which will generate induced current from the induced voltage; control the on-off ratio of the controlled switch with a Pulse-Width-Modulation signal to generate a controllable motor current, which will result in controllable braking torque under the magnet field of the driving motor.

Abstract: A damping control method for lower-limb prosthesis, comprising the following steps: Isolate the driving motor of the transmission structure from the driving voltage; The motor is driven to rotate by the force that results from the locomotion of human's CoM (Center of Mass), and generates alternating induced voltage, when the motor behaves as a generator; Connect the output terminals of the motor with a full-bridge rectification circuit that is made of Schottky diodes to transform the alternating induced voltage to direct-current voltage; Connect the output terminals of the rectification circuit with a controlled switch to form a closed circuit, which will generate induced current from the induced voltage; Control the on-off ratio of the switch with the Pulse-Width-Modulation signal to generate controllable motor current, which will result in controllable braking torque under the magnet field of the motor. This invention can be applied to prosthesis control.

Abstract: Provided are devices, systems, and methods for the testing of materials and structures. For example, the devices, systems, and methods are optionally used for the non-destructive testing of a material or structure. Furthermore, the devices, systems, and methods may optionally use a high-amplitude, air-coupled acoustic source for non-destructive testing of materials and structures.

Abstract: Provided are devices, systems, and methods for the testing of materials and structures. For example, the devices, systems, and methods are optionally used for the non-destructive testing of a material or structure. Furthermore, the devices, systems, and methods may optionally use a high-amplitude, air-coupled acoustic source for non-destructive testing of materials and structures.