A controller (100, 100A) for easily evaluating validity of inertia is provided. A controller (100, 100A) includes: an electric motor (300); an actual operation acquisition unit (301) that acquires an actual operation of the electric motor (300); a model unit (108) that estimates an operation of the electric motor (300) from a current value applied to the electric motor (300) using a model including inertia of the electric motor (300) and a driven body (400) connected to the electric motor (300); an operation signal input unit (106) that applies an operation signal to a control loop of the electric motor (300) for a prescribed period; and an evaluation value calculation unit (111) that calculates an evaluation value for evaluating the inertia on the basis of a difference between an actual operation and an estimated operation in the application period of the operation signal.

A controller (100, 100A) for easily evaluating validity of inertia is provided. A controller (100, 100A) includes: an electric motor (300); an actual operation acquisition unit (301) that acquires an actual operation of the electric motor (300); a model unit (108) that estimates an operation of the electric motor (300) from a current value applied to the electric motor (300) using a model including inertia of the electric motor (300) and a driven body (400) connected to the electric motor (300); an operation signal input unit (106) that applies an operation signal to a control loop of the electric motor (300) for a prescribed period; and an evaluation value calculation unit (111) that calculates an evaluation value for evaluating the inertia on the basis of a difference between an actual operation and an estimated operation in the application period of the operation signal.

A method for demonstrating a new scientific discovery made by the inventor about the nonlinear instability of vehicles, like aircrafts, automobiles and ocean vehicles. Said method includes a model and a three-gimbaled framework that permits said model to respond to inertial moments about the axes of which the moments of inertias are the smallest and the largest, wherein said model has restoring and damping capabilities along these two axes. Said method also comprises how to use a variable motor or a crank for controlling said model rotational motions about the intermediate principal axis of inertia with closed form formulas for the external driven frequencies and amplitudes to be used to excite the nonlinear instabilities of said model. Said model could be an aircraft, an automobile, a ship, or even a rectangular block.

A method is provided during which surface data indicative of a measured surface geometry of a component is received. The surface data is processed to provide model data indicative of a solid model of the component. The model data is processed to determine a center of gravity distance of the component. A moment weight of the component is determined based on the center of gravity distance of the component and a measured weight of the component. The moment weight is communicated with the component.

A method is provided during which surface data indicative of a measured surface geometry of a component is received. The surface data is processed to provide model data indicative of a solid model of the component. The model data is processed to determine a center of gravity distance of the component. A moment weight of the component is determined based on the center of gravity distance of the component and a measured weight of the component. The moment weight is communicated with the component.

A device including a measuring instrument, supporting mechanisms, a swinging mechanism, and a rotating mechanism. The measuring instrument includes an angle sensor and a pressure sensor. The supporting mechanisms are symmetrically disposed at two ends of the swing mechanism. The supporting mechanisms each include a support frame, a base frame, a bracket, and a bracket support. The support frame is disposed on the base frame. The bracket support is disposed on the support frame. The bracket is slidably disposed on the bracket support via locating pins. The swinging mechanism includes a first swing frame, a second swing frame, and a rotary table base disposed between the first swing frame and the second swing frame. The rotating mechanism includes a rotary table. The rotary table is wheel-shaped and includes a rotating shaft and a plurality of radial supporting rods.

A device including a measuring instrument, supporting mechanisms, a swinging mechanism, and a rotating mechanism. The measuring instrument includes an angle sensor and a pressure sensor. The supporting mechanisms are symmetrically disposed at two ends of the swing mechanism. The supporting mechanisms each include a support frame, a base frame, a bracket, and a bracket support. The support frame is disposed on the base frame. The bracket support is disposed on the support frame. The bracket is slidably disposed on the bracket support via locating pins. The swinging mechanism includes a first swing frame, a second swing frame, and a rotary table base disposed between the first swing frame and the second swing frame. The rotating mechanism includes a rotary table. The rotary table is wheel-shaped and includes a rotating shaft and a plurality of radial supporting rods.

A measuring device includes a base station, a weight station unit and a controller. A mount station unit is connected to the weight station unit and has first and second mounting bases connected by a swing arm. The first mounting base is moveably supported on the first weight scale, and the second mounted base is moveably supported on the second weight scale. An adjustable holding part is disposed at one end of the first mounting base and a support is disposed at another end of the first mounting base adjacent the swing arm. A sports article is mountable on the first mounting base between the adjustable holding part and the support.

A measuring device includes a base station, a weight station unit and a controller. A mount station unit is connected to the weight station unit and has first and second mounting bases connected by a swing arm. The first mounting base is moveably supported on the first weight scale, and the second mounted base is moveably supported on the second weight scale. An adjustable holding part is disposed at one end of the first mounting base and a support is disposed at another end of the first mounting base adjacent the swing arm. A sports article is mountable on the first mounting base between the adjustable holding part and the support.

A metrological technique in which the internal mass-density distribution of an object is obtained by measuring the object's inertia. The object is rotated about at least one arbitrary axis while dynamic properties are measured. Moment of inertia is derived from the torque and angular acceleration of the object, which can be used to calculate and estimate the internal mass-density distribution of the object.