#Matlab 2014a you have entered invalid series
If the block output is fed back into this port, either directly or through a series of blocks with direct feedthrough, an algebraic loop results (see Algebraic Loops). Select level to trigger the reset and hold the output to the initial condition while the reset signal is nonzero.Select either to trigger the reset when either a rising or falling signal occurs.Select falling to trigger the state reset when the reset signal has a falling edge.Select rising to trigger the state reset when the reset signal has a rising edge.A trigger port appears below the block's input port and indicates the trigger type, as shown in this figure. To cause the block to reset its state, select one of the External reset choices. The block can reset its state to the specified initial condition based on an external signal. When this option is selected, the block has three zero crossings: one to detect when it enters the upper saturation limit, one to detect when it enters the lower saturation limit, and one to detect when it leaves saturation. -1 indicates that the lower limit is being applied.0 indicates that the integral is not limited.1 indicates that the upper limit is being applied.A saturation port appears below the block output port, as shown on this figure. To generate a signal that indicates when the state is being limited, select the Show saturation port check box. When the integral is greater than or equal to the Upper saturation limit and the input is positive, the output is held at the Upper saturation limit.When the integral is between the Lower saturation limit and the Upper saturation limit, the output is the integral.When the integral is less than or equal to the Lower saturation limit and the input is negative, the output is held at the Lower saturation limit.During a simulation, you can change the limits but you cannot change whether the output is limited. When the output reaches the limits, the integral action is turned off to prevent integral wind up. Doing so causes the block to function as a limited integrator. To prevent the output from exceeding specifiable levels, select the Limit output check box and enter the limits in the appropriate parameter fields. If the initial condition is outside the block's saturation limits, the block displays an error message. If the integrator limits its output (see Limiting the Integral), the initial condition must fall inside the integrator's saturation limits. An additional input port appears under the block input, as shown in this figure. To provide the initial conditions from an external source, specify the Initial condition source parameter as external.To define the initial conditions as a block parameter, specify the Initial condition source parameter as internal and enter the value in the Initial condition parameter field.You can define the initial conditions as a parameter on the block dialog box or input them from an external signal:
Use the Discrete-Time Integrator block to create a purely discrete system. Create an optional state output that allows you to use the value of the block's output to trigger a block reset.Create an input that resets the block's output (state) to its initial value, depending on how the input changes.Define upper and lower limits on the integral.The parameter dialog box also allows you to The block's parameter dialog box allows you to specify another value for the initial condition or create an initial value input port on the block. The default value of the initial condition is 0. The block also provides the solver with an initial condition for use in computing the block's initial state at the beginning of a simulation run. To support this computational model, the Integrator block saves its output at the current time step for use by the solver to compute its output at the next time step. The currently selected solver computes the output of the Integrator block at the current time step, using the current input value and the value of the state at the previous time step. The Integrator block's input is the state's time derivative. Simulink treats the Integrator block as a dynamic system with one state, its output. The Solver pane of the Simulation parameters dialog box (see The Solver Pane) allows you to select the technique best suited to your application. Simulink can use a number of different numerical integration methods to compute the Integrator block's output, each with advantages in particular applications. The following equation represents the output of the block y as a function of its input u and an initial condition y 0, where y and u are vector functions of the current simulation time t. The Integrator block outputs the integral of its input at the current time step. Integrator (Simulink Reference) Simulink Reference
0 kommentar(er)
