Difference between Feedback and Feed Forward control systems Last Updated : 15 Jul, 2025 Comments Improve Suggest changes Like Article Like Report Control systems play an essential role in regulating processes to ensure stability and productivity, primarily through the use of feedback and feedforward control mechanisms. Feedback control systems respond to output deviations and provide precise corrections but may be slower. Feedforward control systems act proactively to disturbances, offering quick responses but lack error-correcting capabilities. Understanding the differences between these systems enhances decision-making when selecting the appropriate control method for specific processes.What is Feedback Control System?Feedback control system is basically a control system where the output depends on the generated feedback signal. Feedback control system is responsible for processing the feedback signals which further act as an input to the system. Feedback control system consist of different components such as resistors, transistors and other electrical appliances which do the basic functioning. The feedback can further be divided into positive feedback and negative feedback.Feedback Control SystemAdvantages of Feedback Control SystemsAccurate Error Correction: Continuously monitors and rectifies output deviations, ensuring high precision.Stability: Effective for maintaining accuracy and balancing variations in input or disturbances.Adaptability: Adjusts to disturbance inputs and variations, ensuring consistent system performance.Simplified Design: Feedback loops can be implemented without needing predictive modeling of disturbances.Broad Applicability: Suitable for systems requiring precise adjustments, such as temperature controlDisadvantages of Feedback Control SystemsSlower Response Time: Reacts only after detecting an error, which may cause delays in dynamic systems.Complexity: Designing feedback loops for complex systems can be challenging.Potential for Oscillations: May cause instability unless carefully tuned.Dependence on Measurement Accuracy: Requires precise measurement of output variables for effective error correction.Error-Dependent: Struggles with large errors, potentially limiting corrective capabilityWhat is Feed Forward Control System?Feed forward control system is a system which passes the signal to some external load. It rejects the disturbances before they affect the controlled variable. It controls the major disturbances and is many times used with the combination of a feedback system. Feed forward systems are sensitive to modelling errors. It does direct measurement of the disturbances in the system. Feedback and feedforward control systems are two different types of control systems used in organizations to monitor and manage processes.Feedforward Control SystemAdvantages of Feed Forward Control SystemsFaster Response: Preempts before an error takes place, it means that it responds faster.Simple Design: Thus, no feedback loop simplifies the system design of the given problem.Efficient for Predictable Systems: Most appropriate for those systems expected to undergo regular interferences or disruptiveness.Smooth Operation: It helps maintain stability by adjusting inputs early, leading to smoother system performance.Prevents Disturbances: By anticipating disturbances, feedforward systems can prevent them from affecting the output.Disadvantages of Feed Forward Control SystemsNo Error Correction: Should the unexpected disturbance happen the organization is unable to manage it once it happens.Less Accurate: If the forecast of disturbances is wrong, then the system isn’t going to operate as planned.Requires detailed system knowledge: Unlike feedback control, it requires modeling of the process and disturbance in order to function efficiently.Sensitive to Changes: Feedforward systems are sensitive to changes in the environment or system that weren’t predicted.Complexity: Designing a feedforward system can be more complex, as it requires understanding and modeling disturbances.Difference between Feedback and Feed Forward Control SystemsFeedback Control SystemFeed Forward Control SystemIn feedback system output depends on the generated feedback signal.In feed forward system the signal is passed to some external load.Measure of disturbances in the system is not needed by feedback system.Measure of disturbances in the system is needed by feed forward system.All the disturbances are detected in feedback system.All the disturbances are not detected in feed forward system.The loop in a feedback control system is a closed loop.The loop in a feed forward control system is an open loop.It focuses on the output of the system.It focuses on the input of the system.Can be more stable but may cause oscillations if not tuned properly.Less stable if predictions are wrong; relies on accurate models.Slower response, as it reacts after errors are detected.Faster response, as it anticipates and adjusts in advance.The variables are adjusted on the basis of errors.The variables are adjusted on the basis of knowledge.Used in systems where errors need to be corrected, such as temperature control, home heating, etc.Used in systems where disturbances can be predicted, like in manufacturing processes or systems with known disturbances.ConclusionFeedback and feedforward control systems are critical tools in managing processes effectively. Feedback systems focus on correcting errors after they occur by monitoring output, making them reliable but slower. Feedforward systems act proactively by anticipating disturbances, offering faster responses but relying heavily on accurate predictions. Combining both methods (hybrid control systems) can leverage the strengths of each, providing precise error correction and quick responsiveness. Comment More infoAdvertise with us K kapilsparshi Follow Improve Article Tags : Difference Between Digital Logic Similar Reads Digital Electronics and Logic Design Tutorials Digital Electronics and Logic Design are key concepts in both electronics and computer science. Digital systems are at the core of everything from basic devices like calculators to advanced computing systems. Digital systems use binary numbers (0s and 1s) to represent and process information.Logic g 4 min read Number SystemsNumber System and Base ConversionsElectronic and digital systems use various number systems such as Decimal, Binary, Hexadecimal and Octal, which are essential in computing. Binary (base-2) is the foundation of digital systems.Hexadecimal (base-16) and Octal (base-8) are commonly used to simplify the representation of binary data. T 9 min read 1's and 2's complement of a Binary NumberGiven a binary number s represented as a string. The task is to return its 1's complement and 2's complement in form of an array as [onesComplement, twosComplement].The 1's complement of a binary number is obtained by flipping all its bits. 0 becomes 1, and 1 becomes 0. Positive numbers remain uncha 8 min read BCD or Binary Coded DecimalBinary Coded Decimal (BCD) is a binary encoding system in which each decimal digit is represented by a fixed number of binary bits, typically four. 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The operation of logic gates is based on Boolean algebra or mathematics.There are basically s 10 min read Basic Conversion of Logic GatesIn the Digital System, logic gates are the basic building blocks.  In these logic gates, we can find the gates having more than one input, but will have only one output. The connection between the input and the output of a gate is based on some logic. 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There are various implicant in K-Map listed below :Prime Imp 5 min read Don't Care (X) Conditions in K-MapsOne of the most important concepts in simplifying output expressions using Karnaugh Maps (K-Maps) is the 'Don't Care' condition. The 'Don't Care' conditions allow us to treat certain cells in a K-Map as either 0, 1, or to ignore them altogether, which can help in forming larger and more efficient gr 4 min read Quine McCluskey MethodThe Quine McCluskey method also called the tabulation method is a very useful and convenient method for simplification of the Boolean functions for a large number of variables (greater than 4). This method is useful over K-map when the number of variables is larger for which K-map formation is diffi 8 min read Two Level Implementation of Logic GatesThe term "two-level logic" refers to a logic design that uses no more than two logic gates between input and output. 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Similarly, a parallel subtractor subtracts all bits at the same time for quic 5 min read Sequential Binary MultiplierIn this article, we are going to learn how a sequential binary multiplier works with examples. So for that, we also need to learn a few concepts related to the sequential circuit, binary multipliers, etc. Finally solving the examples using a sequential binary multiplier method.Sequential CircuitA se 12 min read Multiplexers in Digital LogicIn this article we will go through the multiplexer, we will first define what is a multiplexer then we will go through its types which are 2x1 and 4x1, then we will go through the Implementation of the 2x1 mux and higher mux with lower order mux, at last we will conclude our article with some applic 10 min read Event Demultiplexer in Node.jsNode.js is designed to handle multiple tasks efficiently using asynchronous, non-blocking I/O operations. But how does it manage multiple operations without slowing down or blocking execution? The answer lies in the Event Demultiplexer.The Event Demultiplexer is a key component of Node.js's event-dr 3 min read Binary Decoder in Digital LogicA binary decoder is a digital circuit used to convert binary-coded inputs into a unique set of outputs. It does the opposite of what an encoder does. A decoder takes a binary value (such as 0010) and activates exactly one output line corresponding to that value while all other output lines remain in 5 min read Encoder in Digital LogicAn encoder is a digital circuit that converts a set of binary inputs into a unique binary code. The binary code represents the position of the input and is used to identify the specific input that is active. Encoders are commonly used in digital systems to convert a parallel set of inputs into a ser 7 min read Code Converters - Binary to/from Gray CodeIn this article, we will go through Code Converters - Binary to/from Gray Code, we will start our article by defining Code converters, Binary code and Gray code, and then we will go through the conversion of binary code to gray code and vice versa.Table Of ContentCode ConvertersBinary CodeGray CodeC 5 min read Magnitude Comparator in Digital LogicA magnitude digital Comparator is a combinational circuit that compares two digital or binary numbers in order to find out whether one binary number is equal, less than, or greater than the other binary number. We logically design a circuit for which we will have two inputs one for A and the other f 7 min read Sequential CircuitsIntroduction of Sequential CircuitsSequential circuits are digital circuits that store and use the previous state information to determine their next state. Unlike combinational circuits, which only depend on the current input values to produce outputs, sequential circuits depend on both the current inputs and the previous state stor 7 min read Difference between Combinational and Sequential CircuitIn digital electronics, circuits are classified into two primary categories: The combinational circuits and the sequential circuits. Where the outputs depend on the current inputs are called combination circuit, combinational circuits are simple and effective for functions like addition, subtraction 4 min read Latches in Digital LogicLatch is a digital circuit which converts its output according to its inputs instantly. To implement latches, we use different logic gates. In this article, we will see the definition of latches, latch types like SR, gated SR, D, gated D, JK and T with its truth table and diagrams and advantages and 7 min read Flip-Flop types, their Conversion and ApplicationsIn this article, we will go through the Flip-Flop types, their Conversion and their Applications, First, we will go through the definition of the flip-flop with its types in brief, and then we will go through the conversion of the flip-flop with its applications, At last, we will conclude our articl 7 min read Conversion of Flip-FlopConversion of S-R Flip-Flop into D Flip-FlopPrerequisite - Flip-flop1. S-R Flip-Flop : S-R flip-flop is similar to S-R latch expect clock signal and two AND gates. The circuit responds to the positive edge of clock pulse to the inputs S and R. 2. D Flip-Flop : D Flip-Flop is a modified SR flip-flop which has an additional inverter. It prevent 1 min read Conversion of S-R Flip-Flop into T Flip-FlopPrerequisite - Flip-flop Here, we will discuss the process of conversion of S-R Flip-Flop into a T Flip-Flop using an example. Rules for conversion: Step-1: Find the characteristics table of required flip-flop and the excitation table of the existing (given) flip-flop. Step-2: Find the expression of 1 min read Conversion of J-K Flip-Flop into T Flip-FlopPrerequisite - Flip-flop 1. J-K Flip-Flop: JK flip-flop shares the initials of Jack Kilby, who won a Nobel prize for his fabrication of the world's first integrated circuit, some people speculate that this type of flip flop was named after him because a flip-flop was the first device that Kilby buil 1 min read Conversion of J-K Flip-Flop into D Flip-FlopA flip-flop is a basic component of digital electronics. This kind of circuit has two stable states and is frequently used in storing one bit of information. Various flip-flops such as SR (Set-Reset), D (Data or Delay), JK and T belong to this category. Each category has distinct features and functi 4 min read Register, Counter, and Memory UnitCounters in Digital LogicA Counter is a device which stores (and sometimes displays) the number of times a particular event or process has occurred, often in relationship to a clock signal. Counters are used in digital electronics for counting purpose, they can count specific event happening in the circuit. For example, in 4 min read Ripple Counter in Digital LogicCounters play a crucial role in digital logic circuits, enabling tasks such as clock frequency division and sequencing. This article explores the concept of ripple counters, a type of asynchronous counter, their operation, advantages, and disadvantages in digital logic design. What is a Counter?Coun 5 min read Ring Counter in Digital LogicA ring counter is a typical application of the Shift register. The ring counter is almost the same as the shift counter. The only change is that the output of the last flip-flop is connected to the input of the first flip-flop in the case of the ring counter but in the case of the shift register it 7 min read General Purpose RegistersA register is a collection of flip-flops. Single bit digital data is stored using flip-flops. By combining many flip-flops, the storage capacity can be extended to accommodate a huge number of bits. We must utilize an n-bit register with n flip flops if we wish to store an n-bit word.General Purpose 8 min read Shift Registers in Digital LogicPre-Requisite: Flip-FlopsFlip flops can be used to store a single bit of binary data (1 or 0). However, in order to store multiple bits of data, we need multiple flip-flops. N flip flops are to be connected in order to store n bits of data. A Register is a device that is used to store such informati 8 min read Computer MemoryMemory is the electronic storage space where a computer keeps the instructions and data it needs to access quickly. It's the place where information is stored for immediate use. Memory is an important component of a computer, as without it, the system wouldn’t operate correctly. The computer’s opera 9 min read Random Access Memory (RAM)Random Access Memory (RAM) is a type of computer memory that stores data temporarily. When you turn off your computer, the data in RAM disappears, unlike the data on your hard drive, which stays saved. RAM helps your computer run programs and process information faster. This is similar to how the br 11 min read Read Only Memory (ROM)Memory plays a crucial role in how devices operate, and one of the most important types is Read-Only Memory (ROM). Unlike RAM (Random Access Memory), which loses its data when the power is turned off, ROM is designed to store essential information permanently.Here, we’ll explore what ROM is, how it 8 min read LMNs and GATE PYQsLMN - Digital ElectronicsDigital electronics deals with systems that use digital signals, represented as 0s and 1s, to process information. It is the backbone of modern devices like computers, smartphones, and calculators. Unlike analog electronics, which works with continuous signals, digital electronics offers higher accu 14 min read Digital Logic and Design - GATE CSE Previous Year QuestionsThe Digital Logic and Design(DLD) subject has high importance in GATE CSE exam because:moderate number of questions nearly 6-7% of the total papersignificant weightage (6-7 marks) across multiple years This can be seen in the table given below:YearApprox. Marks from Digital LogicNumber of QuestionsD 2 min read Practice Questions - Digital Logic & Design Like