Tension control system专利检索-施密特触发器电子零件及设备专利检索查询-专利查询网

Tension control system

阅读：86发布：2022-02-03

专利汇可以提供Tension control system专利检索，专利查询，专利分析的服务。并且The brake on an energy absorbing winch is controlled to maintain a predetermined tension in its line during payout by an electronic control circuit having a summing amplifier which operates the brake in response to several signals in various combinations. A signal corresponding to the deviation between the actual line tension and the preset tension is generated by a differential amplifier having inputs of actual and desired tension. Preliminarily and during initial payout, a derivative amplifier modulates the deviation and applies a corrective signal to the summing amplifier, which corresponds to the derivative of the tension deviation with respect to time. The derivative corrective signal immediately releases the brake on capture and initiation of payout. A switch removes the derivative signal from the summing amplifier as soon as the derivative changes polarity from negative to positive, and connects an error integral amplifier between the differential amplifier and the summing amplifier to stably control the braking pressure to obtain the predetermined tension. The standard source binds the error integral amplifier to the predetermined tension before the error integral amplifier is switched into the control circuit. The switching is accomplished by a modified Schmidt-Trigger, which is originally in the neutral state. The derivative amplifier is operatively connected to the Schmidt-Trigger circuit. When the derivative of the deviation originally goes negative, it cocks the trigger circuit. The trigger is actuated when the derivative becomes slightly positive to operate a relay, which disconnects the deviation derivative amplifier from the summing amplifier and replaces it by the deviation integral amplifier. At the end of the arrestment when the actual drag load is below the predetermined tension, the integral amplifier is driven to saturation which applies the full brake pressure during reelingin of the line.，下面是Tension control system专利的具体信息内容。

权利要求

1. A method of controlling a brake to maintain the tension of the line of a recovery winch substantially constant during payout and after capture of an object comprising the steps of preliminarily utilizing a preset signal to maintain a predetermined tension in said line prior to capture of said object, upon capture of said object generating corrective signals corresponding to the derivative and integral of the deviation from said predetermined tension, first applying said derivative signal to said brake for rapidly throwing it off and allowing said line to payout and achieve inertial loads, also utilizing said derivative signal to switch said derivative signal out of control of said brake when said derivative signal changes polarity and to switch said integral signal into control of said brake whereby a more stable correction is ultimately provided.

2. A method as set forth in claim 1 wherein the direct deviation is utilized in conjunction with first said derivative signal and then in conjunction with said integral signal to maintain said predetermined tension.

3. A method as set forth in claim 1 wherein said integral is preliminarily bounded to said preset level to bring it into control substantially at said predetermined tension.

4. A control system for operating a winch brake to maintain the tension on a recovery line substantially constant during capture and payout comprising load detecting means for measuring the tension in said line, a signal conditioner for generating a signal corresponding to said tension, a deviation amplifier, a preset source for feeding a preset signal corresponding to said predetermined tension to said deviation amplifier, said signal conditioner providing another input to said deviation amplifier whereby said deviation amplifier compares said signals and generates a corrective signal, a summing amplifier connected to said winch brake, input means to said summing amplifier connecting said corrective signal from said deviation amplifier thereto whereby said brake is controlled to provide said predetermined line tension, a deviation derivative amplifier, an inpUt and output circuit connecting said deviation derivative amplifier between said deviation amplifier and said summing amplifier whereby a signal corresponding to the derivative of said deviation is connected to said summing amplifier, a deviation integral amplifier, an input and output circuit connecting said deviation integral amplifier between said deviation amplifier and said summing amplifier whereby a signal corresponding to the integral of said deviation is connected to said summing amplifier, a switch in said input and output circuits, an actuator in said switch, said output circuit connecting said derivative amplifier to said actuator to operate said switch whereby said derivative amplifier is preliminarily connected in said system and said integral amplifier is connected out of said system prior to capture and the reverse of said connections when said derivative signal changes polarity.

5. A control system as set forth in claim 4 wherein said switch is preliminarily in a neutral condition, is cocked when said derivative becomes negative, and is then actuated when said derivative becomes slightly positive.

6. A control system as set forth in claim 5 wherein said switch and actuator comprises a Schmidt-Trigger circuit.

7. A control system as set forth in claim 4 wherein said integral amplifier is preliminarily connected to said preset tension level to maintain it substantially at said preset tension level prior to utilization in said control circuit.

说明书全文

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