cascade control

cascade control

[ka′skād kən‚trōl]
(control systems)
An automatic control system in which various control units are linked in sequence, each control unit regulating the operation of the next control unit in line.
References in periodicals archive ?
The software will include basic process control tutorial and simulation models that include gas-liquid flow, single phase heat exchange, reciprocating compressor operations, three phase separation, ratio and cascade control and a glycol contactor dehydrator simulation," Hippensteel said.
Process Input/Remote Setpoint Cards: support input of 0/4 to 20 mA to enable cascade control loops where tighter control is required
There is a cascade control scheme with a parallel pressure controller.
The new controller has larger characters and buttons and its new functions include dual channel PID control, cascade control, square-root linearisation, wet bulb/dry bulb capability, ratio and pressure to altitude compensation curves.
The main feature of the new software is real-time processing capability for cascade control of the injection phase.
The pumps are then controlled in response to a pressure transducer and cascade control ensures adequate vacuum and flow rate is available for all connected machines at all times.
We describe an approach that is useful in deciding if significant benefits, in terms of control loop performance index (through variability reduction), will be achieved by a change in control loop configuration from simple feedback (SFB) to cascade control.
The control method is selectable between position proportional control and cascade control, in addition to the typical heat-only and heat/cool methods.
The control of the vacuum by the servovalve is replaced by a new cascade control including an inner control loop of the rotational pump speed.
0 software which gives enhanced functionality, in particular real-time processing capability for cascade control of the injection phase.
The 1,000 kg/hour capacity plant incorporates a state-of-the-art PLC control system with touch sensitive screens and cascade control from the depositor to the cooking system, maximising process efficiency and production output, while minimising labour requirements.