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Patent US3753106A successfully refreshed from Google Patents.
US3753106A
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System and method for dynamic control of electrical rotary devices
Assignee: General Scanning Inc
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Filing: 1971-02-25
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Granted: 1973-08-14
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Expires: 1991-02-25
Abstract
Abstract A method and system for obtaining precise step-wise motion in an electrical rotary device such as a moving-iron galvanometer, a stepping motor or other electrical device having a linear rotating response controllable by applied electrical pulses. Motion of the device is arrested exactly at the points desired by breaking down the actuating step into a sequence of two steps, the first being applied as the motion-initiating step, and the second being applied at the time of peak overshoot resulting from the first step. The second pulse is of a magnitude to exactly terminate motion at a half-period of resonant oscillation of the system. Signal-conditioning circuits for programming the sequence or time of application of the pulses and their amplitude include a storage circuit, an averaging circuit and a timing circuit to control the application of the sequence pulse.
Inventors
- 👤 P Brosens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:11
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445; G01; G01R; G01R11/00; G01R11/02; G01R11/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
The method of controlling the dynamic response to a stepchange in input signal of a limited rotation device having a control coil and a damping ratio less than unity, said device being linearly responsive to variable magnitude step-changes in said input signal, said method comprising the steps of generating and applying a fraction of said step-change in input signal to said control coil at a given time t and generating and applying in addition the remainder of said step-change in input signal to said control coil at a time substantially equal to t +( pi / omega square root 1 - Zeta 2), where said fraction is substantially equal to 1/(1+x) of said step-change, x is approximately equal to the peak overshoot of said limited rotation device, omega is the undamped natural angular frequency of said limited rotation device and Zeta is the damping ratio.
Claim 2
Independent Claim
145 words
The method of controlling the dynamic response to a stepchange in input signal of a limited rotation device having a control coil and a damping ratio less than unity, said device being linearly responsive to variable magnitude step-changes in said input signal, said method comprising the steps of generating and applying a fraction of said step-change in input signal to said control coil at a given time t and generating and applying in addition the remainder of said step-change in input signal to said control coil at a time substantially equal to t +( pi / omega square root 1 - Zeta 2), where said fraction is substantially equal to 1/(1+x) of said step-change, x is approximately equal to the peak overshoot of said limited rotation device, omega is the undamped natural angular frequency of said limited rotation device and Zeta is the damping ratio.
Claim 3
Dependent Claim
49 words
The method defined in claim 1 wherein the amplitude of said first fraction is substantially equal to 1/(1 + X) and the amplitude of said second fraction is substantially equal to X/(1 + X ) where X is approximately equal to the peak overshoot of said rotary electrical device.
Claim 4
Independent Claim
168 words
The method of controlling the dynamic response to a step-change in input signal of a limited rotation device having a control coil and a damping ratio less than unity, said device being linearly responsive to variable magnitude step-changes in input signal, said step-change of a magnitude sufficient if abruptly applied to cause rotation of said device to, and decaying oscillation of said device about, a predetermined point, said method comprising the steps of generating said step-change in input signal as a sequence of two component steps, the first component step being equal to a fraction of said step-change sufficient to cause rotation of said device to a position of maximum overshoot at said predetermined point, and the second component step being equal to the remainder of said step-change, applying said first component step to said coil at a given time and following a duration approximately equal to half a period of the undamped natural oscillation of said device applying in addition the second component step to said coil.
Claim 5
Independent Claim
168 words
The method of controlling the dynamic response to a step-change in input signal of a limited rotation device having a control coil and a damping ratio less than unity, said device being linearly responsive to variable magnitude step-changes in input signal, said step-change of a magnitude sufficient if abruptly applied to cause rotation of said device to, and decaying oscillation of said device about, a predetermined point, said method comprising the steps of generating said step-change in input signal as a sequence of two component steps, the first component step being equal to a fraction of said step-change sufficient to cause rotation of said device to a position of maximum overshoot at said predetermined point, and the second component step being equal to the remainder of said step-change, applying said first component step to said coil at a given time and following a duration approximately equal to half a period of the undamped natural oscillation of said device applying in addition the second component step to said coil.
Claim 6
Dependent Claim
168 words
A signal-conditioning circuit for controlling the dynamic response of a linearly responsive limited rotation device having a control coil responsive to a step-change in input signal comprising means for normally applying said input signal to said control coil, continually updatable storing means for normally receiving said input signal, means responsive to a step-change in said input signal to set said storing means with the input signal valve preceding said step-change, means for averaging the output of said storing means and said step-chanGed signal, said averaging means set to produce an output equal to the total of said stored signal and a fraction of said step-change, said fraction being substantially equal to 1/(1 + X), where X is approximately equal to the peak overshoot of said device, means for applying said averaged output to said control coil, and means for establishing the full step-changed input signal at said control coil after a period of time approximately equal to half a period of the undamped natural oscillation of said device.
Claim 7
Dependent Claim
168 words
A signal-conditioning circuit for controlling the dynamic response of a linearly responsive limited rotation device having a control coil responsive to a step-change in input signal comprising means for normally applying said input signal to said control coil, continually updatable storing means for normally receiving said input signal, means responsive to a step-change in said input signal to set said storing means with the input signal valve preceding said step-change, means for averaging the output of said storing means and said step-chanGed signal, said averaging means set to produce an output equal to the total of said stored signal and a fraction of said step-change, said fraction being substantially equal to 1/(1 + X), where X is approximately equal to the peak overshoot of said device, means for applying said averaged output to said control coil, and means for establishing the full step-changed input signal at said control coil after a period of time approximately equal to half a period of the undamped natural oscillation of said device.
Claim 8
Dependent Claim
90 words
A signal-conditioning circuit as defined in claim 4 wherein said means for normally storing said input signal comprises a capacitor and resistance network having a time constant permitting storage of said input signal, said means responsive to a step-change in said input signal comprises a switch-drive and switch, said capacitor being normally connected to receive said input signal through said switch, said switch-drive being responsive to step-change to open said switch, stored charge on said capacitor being applied with said step-change to said control coil upon opening of said switch.
Claim 9
Dependent Claim
148 words
A limited rotation electrical device in combination with a circuit for conditioning a step-change in input signal for application to control coil means of said limited rotation device, said device being linearly responsive to variable magnitude step-changes in input signal, comprising means for generating a fraction of said step-change in input signal, said fraction being substantially equal to 1/(1 + X) of said step-change, means for applying said fractional step-change to said control coil means at a given time t, means for generating the remainder of said step-change in input signal, and means for applying in addition said remainder to said control coil means at a time substantially equal to t + ( pi / omega Square Root 1-zeta 2), where x is approximately equal to the peak overshoot of said device, omega is the undamped natural angular frequency of said device and zeta is the damping ratio.
Claim 10
Dependent Claim
148 words
A limited rotation electrical device in combination with a circuit for conditioning a step-change in input signal for application to control coil means of said limited rotation device, said device being linearly responsive to variable magnitude step-changes in input signal, comprising means for generating a fraction of said step-change in input signal, said fraction being substantially equal to 1/(1 + X) of said step-change, means for applying said fractional step-change to said control coil means at a given time t, means for generating the remainder of said step-change in input signal, and means for applying in addition said remainder to said control coil means at a time substantially equal to t + ( pi / omega Square Root 1-zeta 2), where x is approximately equal to the peak overshoot of said device, omega is the undamped natural angular frequency of said device and zeta is the damping ratio.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |