A flexible structure that exhibits axial, bending, and twisting compliance, allowing for limited freedom of deformation and impact load dampening characteristics tailored accordingly for the applications of the flexible structure. The flexible structure comprises two or more formers, a plurality of resilient members supporting and affixed to the perimeters of the formers, and either an elastomeric central member located between each former and in the center of the resilient members, or an elastomeric surrounding member located between each former and around the resilient members, or both. The presence of the central member or surrounding member acts to inhibit excessive deformations of the resilient members through contact forces. This construction provides a strong and flexible structure that can be incorporated with robots, orthopedic braces, and other devices.

A method of making a magnetic miniature robot includes: rotationally deforming a segment of material about a rotational deformation axis, from an initial shape to a deformed shape, the material including a plurality of magnetic particles distributed in an elastic matrix; magnetizing the plurality of magnetic particles in the segment to form a magnetized segment in a magnetization process, in the magnetized segment in the deformed shape being characterized by a uniform magnetization profile; after the magnetization process, enabling the magnetized segment to elastically recover the initial shape and form a non-uniform magnetization profile; and coupling together at least one pair of the segment to form a main component, wherein the non-uniform magnetization profiles of the at least one pair of the segment are disposed in opposing orientations to configure the main component with a zero net magnetic moment about a sixth degree-of-freedom axis.

A system including an inspection robot having a plurality of sensors, a further sensor, and a controller. The controller having circuitry to receive inspection data with a first resolution from the plurality of sensors, determine a characteristic on the inspection surface based on the inspection data, and provide an inspection operation adjustment in response to the characteristic, wherein the inspection operation adjustment includes a change from the first resolution to a second resolution. The change from the first resolution to the second resolution includes enabling the further sensor where the further sensor is at least one of: horizontally distributed with or vertically displaced from the plurality of sensors relative to a travel path of the plurality of sensors, and at least one of: offset in alignment from the travel path of the plurality of sensors, or operated out of phase with the plurality of sensors.

Disclosed are a flexibly-driven small underwater robot and a driving method thereof. The underwater robot provided by the invention comprises a driving module and a propelling module. Two propelling modules are designed at head and tail portions, and the driving module is arranged between the two propelling modules. A rib plate in the driving module comprises a carbon fiber plate matrix and a piezoelectric fiber sheet; and a shape of the carbon fiber plate matrix is optimized by width change and hole digging. The propelling modules comprise a head propelling module and a tail propelling module, and the head propelling module and the tail propelling module are both propelled through a one-way valve. According to the invention, two modes of the pre-compression rib plate are adjusted through the piezoelectric fiber sheet, so that a volume of an internal cavity is changed, and jet propelling is carried out.

A flexible structure that exhibits axial, bending, and twisting compliance, allowing for limited freedom of deformation and impact load dampening characteristics tailored accordingly for the applications of the flexible structure. The flexible structure comprises two or more formers, a plurality of resilient members supporting and affixed to the perimeters of the formers, and either an elastomeric central member located between each former and in the center of the resilient members, or an elastomeric surrounding member located between each former and around the resilient members, or both. The presence of the central member or surrounding member acts to inhibit excessive deformations of the resilient members through contact forces. This construction provides a strong and flexible structure that can be incorporated with robots, orthopedic braces, and other devices.

A spatial large-stroke compliant hinge with hybrid structure, which includes a rectangular planar unit for implementing an out-of-plane torsion function and a crossed-shaped planar unit for achieving an in-plane rotation function. The crossed-shaped planar unit is formed by two flexible straight beam thin sheets intersecting into a crossed-shaped structure with an angle, and the rectangular planar unit and the crossed-shaped planar unit are connected through an external connection or an embedded connection.

Inspection robots with a multi-function piston connecting a drive module to a central chassis and systems thereof are disclosed. An example inspection robot may include a center chassis coupled to a payload coupled to at least two inspection sensors. The inspection robot may further include a drive module coupled to the center chassis, the drive module having a drive wheel to engage an inspection surface and a drive piston mechanically interposed between the center chassis and the drive module. The example may further include wherein the drive piston in a first position couples the drive module to the center chassis at a minimum distance between and the drive piston in a second position couples the drive module to the center chassis at a maximum distance between. The example may further include wherein the drive module is independently rotatable relative to the center chassis.

Disclosed are a flexibly-driven small underwater robot and a driving method thereof. The underwater robot provided by the invention comprises a driving module and a propelling module. Two propelling modules are designed at head and tail portions, and the driving module is arranged between the two propelling modules. A rib plate in the driving module comprises a carbon fiber plate matrix and a piezoelectric fiber sheet; and a shape of the carbon fiber plate matrix is optimized by width change and hole digging. The propelling modules comprise a head propelling module and a tail propelling module, and the head propelling module and the tail propelling module are both propelled through a one-way valve. According to the invention, two modes of the pre-compression rib plate are adjusted through the piezoelectric fiber sheet, so that a volume of an internal cavity is changed, and jet propelling is carried out.

A gripper with at least one gripping jaw is provided. The at least one gripping jaw includes a base, a gripping portion configured to contact an object, a flexible member connecting the base and the gripping portion, and a sensor assembly located between the base and the gripping portion. The flexible member is configured to enable the gripping portion to deflect with respect to the base when the gripping portion is subjected to a force in a first direction from the object. The sensor assembly is configured to generate a signal in response to the deflection of the gripping portion.

Systems, methods, and apparatus for acoustic inspection of a surface are described. An example system may include an inspection robot structured to traverse an inspection surface in a direction of travel. The inspection robot may include a payload having a plurality of arms, connected to the inspection robot, to rotate around respective ones of a plurality of axes while the inspection robot traverses the inspection surface, where each of the plurality of axes is in the direction of travel. A plurality of sleds may be connected to the plurality of arms, and a plurality of inspection sensors connected to the plurality of sleds. The plurality of inspection sensors may be spaced apart from each other at adjustable positions to inspect the inspection surface at an adjustable resolution.