APPARATUS AND METHOD FOR CHARACTERIZATION AND CONTROL OF USAGE DISTURBANCES IN A USAGE ENVIRONMENT OF PRINTERS AND OTHER DYNAMIC SYSTEMS
First Claim
1. A method of characterizing and controlling usage disturbances, such as shake and noise, in a dynamic system including at least one moving part, the method allowing characterization in the usage environment and comprising:
- exciting at least one usage disturbance in the dynamic system with an excitation force applied to the at least one moving part, the excitation force sufficiently small so as not to cause at least one of mechanical drive train failure or skipping, losing position feedback signal, mechanical breakage or burn out of electrical components, thereby creating a danger to a user or to the dynamic system;
measuring the usage disturbances in the dynamic system; and
analyzing the measured usage disturbances in a frequency domain or a time domain;
controlling the usage disturbances with a controller of the dynamic system based on the analyzing.
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Abstract
Dynamic systems with moving parts, such as printers and image forming apparatuses, for example, can shake as a result of reaction forces related to carriage movement. The characteristics of the shake are related to the particular usage environment and, therefore, can be different for the same dynamic system used in different environments. When the shake of a dynamic system is characterized while the dynamic system is in its particular usage environment, the shake can be reduced, for example, based on a degree of control specified by an operator, for every use in that same environment through adjustments based on the characterization.
53 Citations
27 Claims
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1. A method of characterizing and controlling usage disturbances, such as shake and noise, in a dynamic system including at least one moving part, the method allowing characterization in the usage environment and comprising:
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exciting at least one usage disturbance in the dynamic system with an excitation force applied to the at least one moving part, the excitation force sufficiently small so as not to cause at least one of mechanical drive train failure or skipping, losing position feedback signal, mechanical breakage or burn out of electrical components, thereby creating a danger to a user or to the dynamic system; measuring the usage disturbances in the dynamic system; and analyzing the measured usage disturbances in a frequency domain or a time domain; controlling the usage disturbances with a controller of the dynamic system based on the analyzing. - View Dependent Claims (2, 3)
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4. A method of characterizing usage disturbances, such as shake and noise, in a dynamic system including at least one moving part, the method allowing characterization in the usage environment of a user and comprising:
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exciting the usage disturbances in the dynamic system with a pseudo-random binary sequence to generate positions for the at least one moving part of the dynamic system within a tolerance of the dynamic system driving mechanism; measuring the usage disturbances in the dynamic system; and analyzing the measured usage disturbances in a frequency domain or a time domain.
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5. A method of characterizing shake of an image forming apparatus located on a support in the usage environment comprising:
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exciting the shake in at least one of the image forming apparatus or the support; measuring the shake in at least one of the image forming apparatus or the support; and analyzing the measured shake in a frequency domain or a time domain. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A computer-readable storage medium for storing a program therein that, when executed by a processor, causes the processor to perform the steps of:
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exciting a shake in an image forming apparatus; measuring the shake in the image forming apparatus; and analyzing the measured shake in a frequency domain or a time domain. - View Dependent Claims (19)
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20. An image forming apparatus configured to control shake during print operation, the apparatus comprising:
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a controller configured to; excite shake in the image forming apparatus in a usage environment, analyze the shake measured by a sensor in a time domain or a frequency domain, and control the shake by modifying carriage servo commands based on the analysis and a specified degree of control; the sensor configured to measure the shake and provide the measurement to the controller; and input device configured to receive an input of the specified degree of control desired. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A method of controlling shake in an image forming apparatus during print operation, the method comprising:
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exciting shake in the image forming apparatus in a usage environment; measuring the shake with a sensor; analyzing the shake measured by the sensor in a time domain or a frequency domain; and controlling the shake by modifying carriage servo commands based on the analyzing and on a degree of control specified by a user of the image forming apparatus.
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27. A method of manually setting control of usage disturbances in an image forming apparatus in a usage environment, the method comprising:
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initiating, with input from an operator, a sine sweep for positioning a carriage of the image forming apparatus; indicating, by the operator, a frequency at which a level of the usage disturbances is determined, by the operator, to exceed a desired level; and controlling the image forming apparatus at the indicated frequency to maintain the usage disturbances below the desired level.
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Specification