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Linear Regulators and Controllers

The theory of optimal control is concerned with operating a dynamic system at minimum cost. The case where the system dynamics are described by a set of linear differential equations and the cost is described by a quadratic function is called the LQ problem. One of the main results in the theory is that the solution is provided by the linear-quadratic regulator (LQR), a feedback controller whose equations are given below. The LQR is an important part of the solution to the LQG (Linear-Quadratic-Gaussian) problem. Like the LQR problem itself, the LQG problem is one of the most fundamental problems in control theory. This means that the settings of a (regulating) controller governing either a machine or process (like an airplane or chemical reactor) are found by using a mathematical algorithm that minimizes a cost function with weighting factors supplied by a human (engineer). The "cost" (function) is often defined as a sum of the deviations of key measurements from their desired values. In effect this algorithm finds those controller settings that minimize the undesired deviations, like deviations from desired altitude or process temperature. Often the magnitude of the control action itself is included in this sum so as to keep the energy expended by the control action itself limited.

Power Management > Linear Regulators and Controllers > Linear Regulator

Part No.	DS	Manufacturer	D/C	Qty	Region	Action
LM317AEMP		TI	-	2381	China	Request A Quote
LM317AEMP		TI	-	14051	Hong Kong	Request A Quote
LM317AEMP		TI	-	5000	China	Request A Quote
LM317AEMP		TI	-	2379	China	Request A Quote
LM317AEMP		TI	2021	1000	United Kingdom	Request A Quote
LM317AEMP		TI	-	10483	China	Request A Quote
LM317AEMP		TI	2022+	1000	China	Request A Quote
LM317AEMP		TI	2022+	10000	China	Request A Quote
LM317AEMP		TI	2021+	56200	Hong Kong	Request A Quote
LM317AEMP		TI	2021	8000	Hong Kong	Request A Quote
LM317AEMP		TI	2022+	1000	China	Request A Quote
LM317AEMP		TI	201735+	1000	China	Request A Quote
LM317AEMP		TI	-	33	U.S.A.	Request A Quote
LM317AEMP		TI	2022+	15000	China	Request A Quote
LM317AEMP		TI	-	835	China	Request A Quote
LM317AEMP		TI	2021+	12000	South Korea	Request A Quote
LM317AEMP		TI	-	463	China	Request A Quote
LM317AEMP		TI	202245+	3980	China	Request A Quote
LM317AEMP		TI	2019+	30000	Singapore	Request A Quote
LM317AEMP		TI	-	33	U.S.A.	Request A Quote
LM317AEMP		TI	2022+	5280	China	Request A Quote
LM317AEMP		TI	2022+	5894	China	Request A Quote
LM317AEMP		TI	2023+	1296	South Korea	Request A Quote
LM317AEMP		TI	-	250	China	Request A Quote
LM317AEMP		TI	-	12000	China	Request A Quote

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