Single degree of freedom machine identification
First Claim
1. A method of analyzing the characteristics of a cyclical machine having an accessible power transfer shaft comprising the steps ofdriving the machine through a series of operating cycles,measuring torque and angular velocity at the power transfer shaft during separate cycles of operation of the machine,collecting data during the operating cycle at the power transfer shaft for a predetermined number of the aforementioned measurements, andeffecting a solution in the coordinate domain for machine kinetic energy, potential energy and dissipation functions using the collected data.
1 Assignment
0 Petitions
Accused Products
Abstract
A method is presented, together with variations thereof, which provides for identifying single degree of freedom machine operating characteristics from machine power transfer shaft torque and angular velocity measurements, wherein solutions are determined within the physical coordinate domain. Apparatus is disclosed which provides for variation in torque and angular velocity at the power transfer shaft and the shaft is accessible, so that independent measurements may be made. The determination of machine characteristics is useful for verification of analysis, diagnostics, or on-line monitoring for conformance to machine model characteristics.
-
Citations
41 Claims
-
1. A method of analyzing the characteristics of a cyclical machine having an accessible power transfer shaft comprising the steps of
driving the machine through a series of operating cycles, measuring torque and angular velocity at the power transfer shaft during separate cycles of operation of the machine, collecting data during the operating cycle at the power transfer shaft for a predetermined number of the aforementioned measurements, and effecting a solution in the coordinate domain for machine kinetic energy, potential energy and dissipation functions using the collected data.
-
13. A method of analyzing the characteristics of a cyclical machine having an accessible power transfer member comprising the steps of
operating the machine through a series of the operating cycles, obtaining data related to power transfer member force, position and velocity during separate machine operating cycles, and effecting a solution in the coordinate domain for machine kinetic energy, potential energy and dissipation characteristics utilizing the obtained data.
-
24. A method of analyzing the characteristics of a single degree of freedom, scleronomic, holonomic machine having a mechanical operating cycle and an accessible power transfer shaft, comprising the steps of
driving the machine through a series of operating cycles, measuring torque and angular velocity of the power transfer shaft at predetermined angular locations thereof during separate operating cycles of the machine, obtaining data from the aforementioned measuring step for a predetermined number of operating cycles, solving in the coordinate domain for machine kinetic energy, potential energy and dissipation functions using the obtained data, and reducing noise content in the solutions.
-
36. Apparatus for driving a substantially single degree of freedom holonomic mechanical system through a power transfer member and for sensing system characteristics, comprising
a drive motor having an output drive shaft, variable transmission means for coupling said output drive shaft to the power transfer member, means for sensing torque at the power transfer member, means for detecting power transfer member drive position, means for obtaining power transfer member driven speed, feedback means coupled between said means for sensing torque, detecting drive position and obtaining driven speed and said variable transmission means, whereby said motor may impose distinct torque and driven speed conditions on the power transfer member.
-
39. Apparatus for determining the characteristics of a substantially single degree of freedom holonomic mechanical system having a contained power source coupled to a system power transfer member, comprising
means for providing a load coupled to the power transfer member, variable transmission means disposed between said load means and the power transfer member, means for sensing torque at the power transfer member, means for detecting power transfer member drive position, means for obtaining power transfer member speed, feedback means coupled between said means for sensing torque, detecting drive position and obtaining driven speed and said variable transmission means, whereby said means for providing a load may impose distinct torque and speed conditions on the power transfer member.
Specification