High performance controller for shifting resonance in micro-electro-mechanical systems (MEMS) devices
First Claim
1. A control method for a system with a shifting resonance point comprising:
- issuing a command to manipulate a mechanical device;
detecting physical information of the mechanical device;
computing a compensation value based on the detected physical information;
combining the computed compensation with the command; and
manipulating the mechanical device based on the combined command.
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Accused Products
Abstract
Devices being controlled electronically via physical manipulation often display a resonance. In many circumstances, the frequency range of operation is not close to the resonance frequency. In these cases, the resonance can be removed through the use of simple compensation techniques such as filters. However, when the resonance frequency is close to the frequency range of operation and when the resonance frequency can change depending on temperature, time, and physical position of the device, simple compensation techniques cannot be used. The present invention presents a non-mechanical technique for providing compensation for devices with a shifting resonance. The non-mechanical technique allows for the compensation to be performed via computation.
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Citations
27 Claims
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1. A control method for a system with a shifting resonance point comprising:
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issuing a command to manipulate a mechanical device;
detecting physical information of the mechanical device;
computing a compensation value based on the detected physical information;
combining the computed compensation with the command; and
manipulating the mechanical device based on the combined command. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A circuit for controlling a system with a shifting resonance comprising:
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a processor, the processor containing circuitry to issue commands for controlling the functionality of the system;
an actuator coupled to the processor, the actuator containing circuitry to respond to the commands issued by the processor;
a physical device coupled to the actuator;
a sensor coupled to the physical device and the processor, the sensor containing circuitry to detect physical information regarding the physical device and forwarding the detected physical information to the processor;
a differentiator coupled to the sensor, the differentiator containing circuitry to differentiate and filter signals provided by the sensor; and
a damping-scaling unit coupled to the differentiator, the damping-scaling unit containing circuitry to ensure that signals from the differentiator does not exceed a permitted range of signals and to provide an additional damping factor to the signal to rapidly control the physical device. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification