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An actuator is a component of a machine that produces force, torque, or displacement, when an electrical, pneumatic or hydraulic input is supplied to it in a system (called an actuating system). The effect is usually produced in a controlled way. [1] An actuator translates such an input signal into the required form of mechanical energy.
These include dc brush, dc brushless, stepper, or in some cases, even induction motors. It all depends on the application requirements and the loads the actuator is designed to move. For example, a linear actuator using an integral horsepower AC induction motor driving a lead screw can be used to operate a large valve in a refinery.
A rotary actuator is an actuator that produces a rotary motion or torque. The simplest actuator is purely mechanical, where linear motion in one direction gives rise to rotation. The most common actuators are electrically powered; others may be powered pneumatically or hydraulically , or use energy stored in springs .
The current ratio divides current assets by current liabilities. For instance, Alphabet’s Q2 2024 balance sheet had $162.0 billion in current assets compared to $77.9 billion in current liabilities.
In accounting, a current asset is an asset that can reasonably be expected to be sold, consumed, or exhausted through the normal operations of a business within the current fiscal year, operating cycle, or financial year. In simple terms, current assets are assets that are held for a short period.
A circuit where rectifier devices are externally controlled to change AC to current flowing in one direction. actuator An end device of a control system, that manipulates a physical variable such as a valve opening or position of a machine part. adaptive control A control strategy where parameters are adjusted as the controlled process changes.
In UNSNA, the value at current prices of the gross capital stock is obtained, by using price indices for fixed assets at current replacement cost, irrespective of the age of the assets. The net, or written-down value of a fixed capital asset is equal to its current replacement cost, less CFC accrued up to that point in time.
Current liabilities in accounting refer to the liabilities of a business that are expected to be settled in cash within one fiscal year or the firm's operating cycle, whichever is longer. [1] These liabilities are typically settled using current assets or by incurring new current liabilities.