adaptive control


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adaptive control

[ə′dap·tiv kən′trōl]
(control systems)
A control method in which one or more parameters are sensed and used to vary the feedback control signals in order to satisfy the performance criteria.

Adaptive control

A special type of nonlinear control system which can alter its parameters to adapt to a changing environment. The changes in environment can represent variations in process dynamics or changes in the characteristics of the disturbances.

A normal feedback control system can handle moderate variations in process dynamics. The presence of such variations is, in fact, one reason for introducing feedback. There are, however, many situations where the changes in process dynamics are so large that a constant linear feedback controller will not work satisfactorily. For example, the dynamics of a supersonic aircraft change drastically with Mach number and dynamic pressure, and a flight control system with constant parameters will not work well. See Flight controls

Adaptive control is also useful for industrial process control. Since delay and holdup times depend on production, it is desirable to retune the regulators when there is a change in production. Adaptive control can also be used to compensate for changes due to aging and wear. See Process control

References in periodicals archive ?
Therefore immersion and invariance adaptive control is proposed to solve the problems above in [7,8,11,15].
Therefore, considering an adaptive control input that can compensate for the model error is necessary when designing a pseudo input.
In the early 1980s, the robust adaptive control behavior has become much discussed [17,18].
Lloyd, "Variable structure adaptive control of robot manipulators," IEE Proceeding-Control Theory and Applications, vol.
At present, the control problem of hydraulic servo-system has been an active research field by designing the adaptive control technique.
Adaptive Control Systems are classified into the following categories a) Adaptive Control for Optimization (ACO) for process and system constraints.
The second feature is a patented adaptive control algorithm, which immediately corrects after disturbances, splices or changes in material.
The APS's ability to self-adjust speed to maintain 0.1F control accuracy, adaptive control low mass--high watt density nozzle and auto-staged heating system will "ensure perfect parts every cycle" the company claims.
Adaptive control systems use a computer and data from intrinsic sensors to constantly and rapidly change the knee's resistance to flexion and extension [27].
Under this contract, Iteris' work is expected to include procurement and installation of central hardware and software that upgrades the District's current central traffic control system with an adaptive control module to enhance the system functionality.
For increased efficiency, the application software includes options enabling users to add a feed rate optimizer, tool balancer, an integrated measuring system and adaptive control.

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