CD Impulse Response VI

Owning Palette: Time Response VIs

Requires: Control Design and Simulation Module

Calculates the output of the system when an impulse excites it. Wire data to the State-Space Model input to determine the polymorphic instance to use or manually select the instance.

Details  

Impulse Response (State-Space)

	States Graph Ref is a reference to the State Trajectory Graph. States Graph Ref configures the x-scale, y-scale, and legend properties. If you want to use the default settings or customize the settings for these properties, do not wire a value to this input.
	Response Graph Ref is a reference to the Impulse Response graph. Response Graph Ref configures the x-scale, y-scale, and legend properties. If you want to use the default settings or customize the settings for these properties, do not wire a value to this input.
	State-Space Model contains a mathematical representation of and information about the system for which this VI calculates impulse response.
	Time Range contains information about the initial time, final time, and time step. t0 is the initial time in seconds in the Step Response graph. The default is –1. dt is the constant interval between successive values in the time vector. The default is –1. tf is the final time in seconds up to which this VI calculates the step response. The default is –1.
	Initial Conditions specifies the initial values of the states or outputs. The default is 0.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Response Plots Index specifies the index number of the inputs and outputs of the system. Input # is the index number of the specific input to the system. This VI displays the response to this input on the Initial Response graph. The index is zero-based. Output # is the index number of the specific output of the system that this VI displays on the Initial Response graph. The index is zero-based.
	State Plots Index specifies the index number of the inputs and outputs of the system. input # is the number of the specific input to the system due to which this VI displays the state trajectories in the State Trajectory Graph. The index is zero-based. output # is the index number of the specific output of the system due to which this VI displays the state trajectories in the State Trajectory Graph. The index is zero-based.
	Impulse Response Graph displays an XY graph that shows the forced response of the system when the forcing function is an impulse. For MIMO systems, this VI determines the impulse response by applying an impulse on one input at a time and letting other inputs to the system equal zero.
	State Trajectory Graph displays an XY graph that shows the value of each state as a function of time. For MIMO systems, this VI calculates the states for each input at a time, where one input is the impulse and all the other inputs to the system are zero.
	Impulse Response Data returns information about the impulse response. To access the Impulse Response Data, use the CD Get Time Response Data VI. Time is the uniformly-spaced time vector against which this VI plots the impulse response and the state trajectories. Outputs Data returns data about the time response of the outputs to the inputs. Refer to the Details section for more information about the Outputs Data. States Data returns data about the time response of the states to the inputs. For transfer function and zero-pole-gain models, this array is empty. Refer to the Details section for more information about the States Data.
	error out contains error information. This output provides standard error out functionality.

Impulse Response (Transfer Function)

	Response Graph Ref is a reference to the Impulse Response graph. Response Graph Ref configures the x-scale, y-scale, and legend properties. If you want to use the default settings or customize the settings for these properties, do not wire a value to this input.
	Transfer Function Model contains a mathematical representation of and information about the system for which this VI calculates impulse response.
	Time Range contains information about the initial time, final time, and time step. t0 is the initial time in seconds in the Step Response graph. The default is –1. dt is the constant interval between successive values in the time vector. The default is –1. tf is the final time in seconds up to which this VI calculates the step response. The default is –1.
	Initial Conditions specifies the initial values of the states or outputs. The default is 0.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Response Plots Index specifies the index number of the inputs and outputs of the system. Input # is the index number of the specific input to the system. This VI displays the response to this input on the Initial Response graph. The index is zero-based. Output # is the index number of the specific output of the system that this VI displays on the Initial Response graph. The index is zero-based.
	Impulse Response Graph displays an XY graph that shows the forced response of the system when the forcing function is an impulse. For MIMO systems, this VI determines the impulse response by applying an impulse on one input at a time and letting other inputs to the system equal zero.
	Impulse Response Data returns information about the impulse response. To access the Impulse Response Data, use the CD Get Time Response Data VI. Time is the uniformly-spaced time vector against which this VI plots the impulse response and the state trajectories. Outputs Data returns data about the time response of the outputs to the inputs. Refer to the Details section for more information about the Outputs Data. States Data returns data about the time response of the states to the inputs. For transfer function and zero-pole-gain models, this array is empty. Refer to the Details section for more information about the States Data.
	error out contains error information. This output provides standard error out functionality.

Impulse Response (Zero-Pole-Gain)

	Response Graph Ref is a reference to the Impulse Response graph. Response Graph Ref configures the x-scale, y-scale, and legend properties. If you want to use the default settings or customize the settings for these properties, do not wire a value to this input.
	Zero-Pole-Gain Model contains a mathematical representation of and information about the system for which this VI calculates impulse response.
	Time Range contains information about the initial time, final time, and time step. t0 is the initial time in seconds in the Step Response graph. The default is –1. dt is the constant interval between successive values in the time vector. The default is –1. tf is the final time in seconds up to which this VI calculates the step response. The default is –1.
	Initial Conditions specifies the initial values of the states or outputs. The default is 0.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	Response Plots Index specifies the index number of the inputs and outputs of the system. Input # is the index number of the specific input to the system. This VI displays the response to this input on the Initial Response graph. The index is zero-based. Output # is the index number of the specific output of the system that this VI displays on the Initial Response graph. The index is zero-based.
	Impulse Response Graph displays an XY graph that shows the forced response of the system when the forcing function is an impulse. For MIMO systems, this VI determines the impulse response by applying an impulse on one input at a time and letting other inputs to the system equal zero.
	Impulse Response Data returns information about the impulse response. To access the Impulse Response Data, use the CD Get Time Response Data VI. Time is the uniformly-spaced time vector against which this VI plots the impulse response and the state trajectories. Outputs Data returns data about the time response of the outputs to the inputs. Refer to the Details section for more information about the Outputs Data. States Data returns data about the time response of the states to the inputs. For transfer function and zero-pole-gain models, this array is empty. Refer to the Details section for more information about the States Data.
	error out contains error information. This output provides standard error out functionality.

CD Impulse Response Details

In the state-space version of the CD Impulse Response VI, the State Trajectory Graph is not available when the model contains transport delays. You can reduce the nonzero delay entries in the transport delay matrix with the CD Distribute Delay VI. However, distributing the transport delay does not accurately reflect the effect of the delay in the states. Therefore, when transport delays are present in state-space models, the CD Impulse Response VI eliminates the state trajectories.

This VI supports input and output delays. This VI ignores transport delay information. Refer to the LabVIEW Control Design User Manual for more information about delays.