EP4298637A1

EP4298637A1 - Apparatus for controlling a training device

Info

Publication number: EP4298637A1
Application number: EP22706275.9A
Authority: EP
Inventors: Valentina Unakafova; Anton Unakafov; Alexander Schmitt; Thomas Marik; Balthasar Stelzner; Joachim Köninger; Max Batt; Julien HENAUT
Original assignee: Bitifeye Digital Test Solutions GmbH
Current assignee: Bitifeye Digital Test Solutions GmbH
Priority date: 2021-02-25
Filing date: 2022-02-11
Publication date: 2024-01-03
Also published as: JP2024508576A; TW202239446A; DE102021104520B3; CN115516572A; WO2022179860A1; US20230084426A1

Abstract

The invention relates to an apparatus for controlling a training device (2), said apparatus comprising: - the training device, which is designed to receive a mechanical effort (9) expended by a person (8) performing a physical exercise; - a support unit (6) which is designed to support the exercise and/or to make the exercise more difficult; - an exertion measuring device (5) which is designed to measure mechanical exertion data BD(t) of an exertion expended by the person during the exercise, where t is time; - a body sensor (7) which is designed to measure physiological data PD(t) of the body of the person; - a computing unit (3) in which a mathematical model of the form mPD(t+ T)= a₁₀ +Σ_x B_x(t) is stored which includes (Formula I) and (Formula II), the computing unit (3) being designed to adjust the coefficients a_xi, the summand a₁₀, and the delays τ_xi at least in part, and the delay T individually for each person, by means of an optimisation algorithm (11) in such a manner that mPD(t+T) approximates the measured physiological data PD(t+T), and to make a forecast mPD{t+T) of the physiological data PD(t+T) on the basis of said model; and a control unit (4) which is designed to take a predefined reference variable for the physiological data PD(t), to take the forecast mPD(t+T) as a control variable, and to control a support u(t) of the support unit as a manipulated variable.

Description

Device for controlling an exercise machine

The invention relates to a device for controlling a training device.

There is a variety of exercise equipment that a person can use to exercise and thus improve their fitness. An electric bicycle is mentioned as an example. Other examples include a stationary bike, an abductor/adductor machine, and an arm strength machine. When exercising, it is critical that the individual exerts enough effort so that the exercise actually results in an improvement in fitness, but also avoids overexertion, which can result in physical harm to the individual. It is important to remember that an optimal effort range can vary greatly from person to person. It is important that during training the training device is used or adjusted correctly so that the person exerts himself sufficiently but at the same time does not overexert himself. Ideally, the exerciser should be designed to be adjustable for both a person suffering from heart failure and a person engaged in competitive sports. An example of improper use of the exercise machine is setting the power of the e-bike motor too high. As a result, the person does not make enough effort, but at the same time drives at a rather high speed, which is associated with an increased risk of accidents.

It is therefore the object of the invention to create a device with a training device that is controlled in such a way that a person exercising with the training device can make sufficient effort, but at the same time overexerting the person can be avoided.

A device according to the invention for controlling a training device has: - The training device, which is set up to record a mechanical power exerted by a person performing physical training, and a

Support unit set up to support the training and/or to make the training more difficult, and comprising an effort measurement device set up to measure mechanical effort data BD ( t ) of an effort exerted by the person during the training, where t is the time ,

- a body sensor set up to measure physiological data PD ( t ) of the person's body,

- a computing unit in which a mathematical model of the form mPD ( t+ T) is stored, the computing unit being set up to adapt mPD ( t+ T) and the delay T individually for each person by means of an optimization algorithm such that mPD ( t+ T) approximating the measured physiological data PD ( t+ T) and using the model to make a prediction mPD ( t+ T) of the physiological data PD ( t+ T), and

- A control unit that is set up to take a predetermined reference variable for the physiological data PD {t) as a control variable to take the prognosis mPD (t+T) and to control a support u {t) of the support unit as a manipulated variable.

It is preferred that: wherein the computing unit is set up to use the optimization algorithm to adjust the coefficients a _x1 , the summand a ₁₀ and the delays Τ _Xi individually, at least in part, for each person in such a way that mPD ( t + T) the measured approximates physiological data PD(t+T). In the term Bi(t), an averaging of D _i +1 measurement points is made, which have a time interval K _i . For example, the values for Di can be _selected from a range of 0-60. The values for the time interval K _i can be selected from a range of 0.2 seconds to 2 seconds, for example.

By taking the forecast mPD(t+T) as the control variable, in which the time t+T is the delay T in the future, the control unit can react to changes in the training much more quickly than it would if as the controlled variable the physiological data PD(t) would be taken. As a result, control deviations of the controlled variable from the reference variable can be kept much lower than would be the case if the physiological data PD(t) were taken as the controlled variable. Due to the fact that the computing unit is set up to adjust the coefficients a _x1 , the summand a ₁₀ , the delays Τ _Xi and the delay T individually for each person, the system deviations for any given person can be kept low. Different people react at different speeds to a change in a load acting on the person from the outside, which is generated by the training device, for example. If the person is rather untrained, they will react rather slowly to the change, if the person is rather trained, they will react rather quickly to the change. Since the computing unit is set up not only to adapt the coefficients a _x1 and the summand a ₁₀ but also the delays Τ _Xi and the delay T individually for each person, the model can reflect the fact that different people react at different speeds to changes in the load. As a result, the prognosis for each person has a particularly high degree of accuracy, which also means that deviations from the control are particularly low. It is only necessary to specify the appropriate reference variable for the physiological data PD(t) for each person, it being possible for the reference variable to vary over time. For example, a sports physician or consult a physiotherapist. Due to the fact that the control deviations are particularly low, it is now possible to control the training device in such a way that the person exerts enough effort to improve the person's fitness and that overexertion of the person is avoided.

The support u(t) can be positive, which aids the training, and/or negative, which makes the training more difficult. An example of a support unit that is set up to support the training is an electric motor of an electric bicycle. In this case, the support could be power applied by the electric motor, for example. An example of a support unit that is set up to make training more difficult is a brake on a bicycle ergometer. In this case, the support could be braking power, for example. An example of one

A support unit that is set up to support and make training more difficult is an electric motor of an electric bicycle that is set up to carry out recuperation, i.e. to convert a person's pedaling power into electricity. In order to keep the control deviation particularly low, it is preferable for the support unit to be set up to control the support u(t) in small increments. For example, the increments can be a maximum of 3%, in particular a maximum of 1.5% or a maximum of 1%. It applies here that 100% corresponds to a maximum support u(t) if the support unit is set up to support the training. In the event that the support unit is set up to make the training more difficult, -100% corresponds to a maximum difficulty of the training.

The exertion data BD(t) characterizes a mechanical exertion of the person that he exerts in the training to overcome the load. In a resting state of the subject, the exertion data BD(t) is zero. The physiological Data comprises variables that characterize the functioning of systems and/or subsystems in the person's body and are measurable with a sensor. The system or subsystem may be the cardiorespiratory system, or part thereof, or the musculoskeletal system, or part thereof. For example, the physiological data PD(t) can be a heart rate. There are some variables, such as a knee adduction moment and/or a knee abduction moment, that are relevant to both the exertion data BD(t) and the physiological data PD(t).

It is preferred that j is selected from the range of 2-5. It was found that for j=2 only a small amount of computing power is required, but sufficient precision for the prediction is achieved, with higher precision for the prediction being achieved for j=5.

It is preferred that k is selected from the range of 1-4. It was found that for k=1 only a small amount of computing power is required, but a sufficient precision for the forecast is achieved, with a higher precision for the forecast being achieved for k=4.

The training device preferably has an altimeter which is set up to measure the height h(t) of the training device, with the model is. Because the height h(t) has an influence on the load, the control deviations can be further reduced by using B3(t). The provision of the altimeter is particularly relevant when the exercise device is the electric bicycle. The altimeter can be implemented by a GPS receiver, for example. The GPS receiver can be part of a smartphone, for example. It is particularly preferred that 1 is in the range of 1 to 4 is selected. It was found that 1=1 requires little computational power but achieves sufficient prediction precision, while 1=4 achieves greater prediction precision.

The training device preferably has a temperature sensor which is set up to measure the temperature Temp(t) in the vicinity of the training device, in which case in the model is. Because the temperature Temp(t) has a major influence on the load, the control deviations can be further reduced by using B ₄ (t). The provision of the temperature sensor is particularly relevant when the training device is intended to be used outdoors, as is the case with the electric bicycle, for example. It is particularly preferred that m is selected from the range 1-2. It was found that only a small amount of computing power is required for m=1, but sufficient precision for the forecast is achieved, with higher precision for the forecast being achieved for m=2.

It is preferred that the training device has an inclination sensor, which is set up to measure an inclination N(t) of the training device and in the model is. The inclination sensor can have an inclination calculation unit, for example, which is set up to determine the inclination N(t) from the time derivation of the height dh(t)/dt. Alternatively, it is conceivable that the inclination sensor is part of a smartphone. It is also conceivable that the inclination sensor is permanently installed in the training device. It is particularly preferred that n is selected from the range 1-4. It was found that for n=1 only a small amount of computing power is required, but sufficient precision for the forecast is achieved, with n=4 a higher precision for the forecast being achieved. It is preferred that the delays τ _xi be zero and all delays Τ _xi are adjusted for i>1. It is preferred that the computing unit is set up to create the prognosis mPD(t+T) for the point in time t+T, which is at least T=5 s in the future.

It is preferred that the computing unit is set up to use the optimization algorithm to calculate the coefficients a _x1 , the summand a ₁₀ , the delays τ _xi and the delay T after the training session using the exertion data BD(t) determined in a plurality of training sessions and the physiological data PD(t) determined in the majority of the training units and optionally the height h(t) determined in the majority of the training units, the temperature Temp(t) determined in the majority of the training units and/or the incline determined in the majority of the training units Adjust N{t) to take into account a basic fitness of the person. With the majority of

Training units can be, for example, all training units carried out by the person. Alternatively, it is conceivable that the majority of the training units is a number of the last training units carried out.

It is preferred that the arithmetic unit is set up, after the training unit, to adjust the coefficients a _x1 , the addend a ₁₀ , the delays τ _xi and the delay T by means of the optimization algorithm 11, which has the steps: a) specifying a plurality of discrete values in each case for each of the coefficients a _xi , for each of the delays τ _xi , for the summand a ₁₀ , and for the delay T; b) setting a _xi , a ₁₀ , τ _xi and T to one of the values; c) calculating mPD (t+T) from the model; d) calculating a modeling error between the measured physiological data PD(t+T) and mPD(t+T) for a plurality of t. e) repeating steps b) through d) for all combinations of values; f) Choosing those values for a _xi , a ₁₀ , τ _xi and T that result in the lowest modeling error. here Although this is a computationally intensive method, the values a _xi , a ₁₀ , τ _xi and T can be determined with a high level of accuracy, so that the control deviations are particularly low. It is particularly preferred that underestimation errors are weighted more heavily than overestimation errors in step d).

The computing unit is preferably set up to calculate the coefficients a _xi and the summand a ₁₀ during a training session using an algorithm for adapting a daily fitness level, using the exertion data BD(t) determined in the training session and the physiological data PD(t) determined in the training session as well optionally adapt to the height h(t) determined in the training session, the temperature Temp(t) determined in the training session and/or the incline N(t) determined in the training session, in order to take into account the person's fitness for the day. By taking the daily fitness into account, the deviations from the rules can be kept particularly low.

It is particularly preferred that the computing unit is set up to calculate a difference Diff(t)=mPD(t)−PD(t) between the forecast of the physiological data mPD(t) and the measured physiological data PD using the algorithm for adjusting the daily fitness (t) to determine, and if the difference Diff(t) exceeds a threshold level of Schlelei>0, to correct the coefficients axi by adding a respective constant constixi and to correct the summand a ₁₀ by adding a constant constio and if the difference falls below the difference Diff (t) to correct the coefficients a _xi by adding a respective constant const _Mxi and to correct the summand a ₁₀ by adding a constant const _M0 from a threshold value thresholdM<0. This is advantageously a method that requires little computational effort and is also suitable for implementation during the training session. Further threshold values can also be provided. For example, a corresponding program code can look like this: if (Diff(t)>Threshold ₁ ) a _x1 = a _x1 + constix a _X2 = a _X2 + consti _X2 , else if (Diff(t)>Threshold2) a _x1 = a _x1 + const2 _Xi , a _X2 = a _X2 + const2 _X2 , eiif (Diff(t)>thresholdM-i) a _x1 — a _x1 + const _(M-1)x1; a _X 2 = a _X 2 + const _(M-1)X2, even if (Diff(t)<thresholdM) a _x1 = a _x1 + const _Mx1 , a _X2 = a _X2 + const _Mx2 , even if (Diff(t)< thresholdM+K) a _x1 = a _x1 + const(H+K)a _x1, a _X 2 = a _X 2 + const(H+K) _X2,

End

With each if query, all the coefficients a _xi and the summand a ₁₀ are corrected and the following applies:

Threshold>threshold2>...>threshold _M-1 > threshold+ _K >...>threshold _M+1 > thresholdM

The control unit is preferably a PID controller. The PID controller is particularly suitable for controlling the physiological data PD(t) because its integral term helps to gradually reduce the control deviation and its derivative term allows control deviations to be corrected even before they actually occur. It is particularly preferred that the PID controller is set up to support u(t) according to to be determined, where K _p , K _I and K _D are control parameters, where e(t) is the control deviation at time t, the functions f ₁ (e), f ₂ (e) and f ₂ (e) being so chosen are that underestimation errors are weighted more heavily than overestimation errors. As a result, deviations of the controlled variable to values greater than the reference variable are less likely than deviations of the controlled variable to values lower than the reference variable. This can avoid the overexertion that can cause physical harm to the person. It is particularly preferred that and and f ₃ (e)=0 for e<0 and f ₃ (e)=e for e>0, where in fi(e) and -f ₂ (e) the polynomial can be different from e in different regions.

It is particularly preferred that the computing unit is set up to adjust the control parameters K _p , K _I and K _D individually for each person. In this way it can be achieved that the deviations for each person are particularly low.

The processing unit is preferably set up to carry out a calibration method in which a step response of the physiological data PD(t) is generated by an abrupt change in the manipulated variable, with the processing unit preferably being set up to calculate the control parameters K _p , K _I and K _D from the step response _TO determine. In order to generate the step response, the computing unit can be set up to continuously record the physiological data PD(t). The arithmetic unit is set up, the support unit at a point in time To to switch from a constant first support ui to a constant second support U2 in order to bring about the abrupt change in the manipulated variable. For example, ui can be from 80% to 100% and U2 from 0% to 20%. Information can be displayed to the person that they should exercise with a constant frequency, for example a cadence, if possible. Both with the first support ui and with the second support U2, the processing unit is set up to wait long enough for the physiological data PD(t) to have stabilized by a value PDi before switching and by a value PD2 after switching. The computing unit can be set up to wait at least 2 minutes before and after switching. It is also conceivable that the computing unit is set up to generate a second step response. For this purpose, after the exertion data BD ( t ) or the physiological data PD ( t ) have stabilized after the abrupt change in the manipulated variable, the processing unit can be set up to switch the support from U2 to U1 and to wait again until the physiological data PD ( t ) stabilized.

It is preferred that the arithmetic unit is set up to identify at least one abrupt change in the manipulated variable and the resulting step response of the physiological data PD(t) after a training session, the arithmetic unit being set up to use the at least one step response to identify the control parameters K _p , Determine K _I and K _D TO. It is conceivable that the computing unit is set up to use the calibration method for a rough adjustment of the control parameters K _p , K _I and K _D and to use the at least one step response identified outside of the calibration method after the training unit in order to finely adjust the control parameters K _p , K _I and K _D .

The exertion data BD(t) preferably show a performance, in particular a pedaling performance in the case of a bicycle, in particular an electric bicycle, or in the case of a bicycle ergometer Mileage, a rowing power, a speed, a torque, a speed, an angular velocity and/or a knee abduction moment.

It is preferred that the support unit has an electric motor, a gearbox and/or a brake.

It is preferred that physiological data PD(t) is a heart rate, heart rate variability, an electrocardiogram, blood oxygen saturation, blood pressure, neurological activity, in particular electroencephalography, a knee abduction moment, an adduction, in particular a knee adduction, and/or a exhibit knee flexion.

The invention is explained in more detail below with reference to the attached schematic drawing.

FIG. 1 shows an overview of a device according to the invention.

FIG. 2 shows a detail of the overview according to the invention.

FIG. 3 shows a plot for f ₁ (e) and -f ₂ (e).

FIG. 4 shows a plot for f ₃ (e).

FIG. 5 shows a plot for a step response of the physiological data PD(t), which is generated by an abrupt change in the manipulated variable.

FIG. 6 shows a plot of various measured variables recorded during a training session.

Figures 1 and 2 show that the device 1 for controlling a training device 2 has: - The training device 2, which is set up to absorb a mechanical power 9 expended by a person 8 performing physical training, and a

Support unit 6, which is set up to support the training and/or to make the training more difficult, and has an effort measuring device 5, which is set up to measure mechanical effort data BD(t) of an effort exerted by the person during the training, where t is the Time is,

- a body sensor 7 which is set up to measure physiological data PD(t) of the body of the person 8,

- A computing unit 3, in which a mathematical model of the form is set up, using an optimization algorithm 11, the coefficients a _xi , the summand aio, the delays τ _xi at least partially and the delay T for each person individually so that mPD (t + T) the measured physiological data PD(t+T) and to create a prognosis mPD(t+T) of the physiological data PD(t+T) using the model, and a control unit 4 which is set up to use a predetermined reference variable for the physiological data PD( t), to take the prognosis mPD (t+T) as a controlled variable and to control a support u(t) of the support unit 6 as a manipulated variable. In the term Bi(t), an averaging of D _i +1 measurement points is made, which have a time interval K _i . The training device 2 can have an altimeter which is set up to measure the height h(t) of the training device 2 and in the model can be. In addition, the training device 2 can have a temperature sensor that is set up to measure the temperature Temp(t) in the vicinity of the training device 2 and in the model be. The exercise machine 2 may include an incline sensor configured to measure an incline N(t) of the exercise machine 2, and in the model may be.

The control unit can be a PID controller, for example. In this case, the PID controller can be set up, for example, the support u(t) according to to be determined, where K _p , K _I and K _D are control parameters, where e(t) is the control deviation at time t, the functions f ₁ (e), f ₂ (e) and f ₃ (e) being chosen in this way that underestimation errors are weighted more heavily than overestimation errors. Thereby can and and f ₃ (e)=0 for e<0 and f ₃ (e)=e for e>0, where in fi(e) and -fz(e) the polynomial can be different from e in different regions. FIG. 3 shows an example plot for f ₁ (e)=f ₂ (e) and FIG. 4 shows an example Plot for f ₃ ( e ) . As can be seen from FIG. 3, the functions f ₁ (e) and f ₂ (e) can have an angle bisector and lie above the angle bisector only in a range 0<e<Ei or 0<e<E2. For example, especially if the physiological data is a heart rate, the following can apply: f ₁ ( e) = f ₂ ( e) = e for e>12 or e<0 and f ₁ (e) = f ₂ (e )=2*e-0.082*e ² for 0≤e≤l2. As can be seen from FIG. 4, the following can apply for f ₃ (e), for example: f ₃ (e)=e for e>0 and f ₃ (e)=0 for e≦0.

It is conceivable that the computing unit 3 is set up to individually adjust the control parameters K _p , K _I and K _D for each person 8 . For this purpose, the processing unit 3 can be set up to carry out a calibration method in which a step response of the physiological data PD(t) is generated by an abrupt change in the manipulated variable at a point in time To, with the processing unit 3 being set up to calculate the control parameters K _p , K _I and K _D TO be determined.

An exemplary step response is shown in FIG.

In order to generate the step response, the computing unit 3 can be set up to continuously record the physiological data PD(t). The computing unit 3 can be set up to switch the support unit 6 from a constant first support ui to a constant second support U2 in order to bring about the abrupt change in the manipulated variable from . For example, ui can be from 80% to 100% and U2 from 0% to 20%. Information can be displayed to the person that they should exercise with a constant frequency, for example a cadence, if possible. Both with the first support ui and with the second support U2, the processing unit 3 can be set up to wait long enough for the physiological data PD(t) to have stabilized by a value PDi before switching and by a value PD2 after switching . The computing unit 3 can be set up to wait at least 2 minutes before and after switching. To determine the control parameters from the step response, the computing unit 3 be set up to apply an inflection tangent 13 to the step response. Before applying the turning tangent 13, PD(t) can be fitted by a function, for example a polynomial, and the turning tangent 13 can be applied to the fitted function. A least squares method can be used to fit the function. The intersection of turning tangent 13 with PD(t)=PDi determines a delay period Tu beginning at To, and the intersection of turning tangent 13 with PD(t)=PD2 determines a compensation period T _G beginning at the end of Tu. The control parameters can now, for example, according to K _P =1.2*T _G /

(Ks*Tu), K _I =0.6*T _G /(K _s *(T _u) ² ) and K _D =0.6*T _G /K _S where Ks is the gain factor and as a ratio can be calculated from control variable change to support change.

It is conceivable that the processing unit is set up to identify at least one abrupt change in the manipulated variable and the resulting step response of the physiological data PD(t) or the exertion data BD(t) after a training session, with the processing unit being set up to identify at least determine a step response the control parameters K _p , K _I and K _D ZU. It is also conceivable that the computing unit is set up to use the calibration method for a rough adjustment of the control parameters K _p , K _I and K _D and to use the at least one step response identified outside of the calibration method after the training unit in order to finely adjust the control parameters K _p , K _I and K _D .

It is also conceivable that the computing unit is set up to generate a second step response. For this purpose, after the physiological data PD(t) has stabilized after the abrupt change in the manipulated variable, the processing unit can be set up to switch the support from U2 to ui and to wait again until the exertion data BD(t) or the physiological data PD (t) stabilized. The control parameters K _p , K _I and K _D can be different when the support u(t) increases or decreases.

The computing unit 3 can be set up to use the optimization algorithm 11 (see Figure 2) to calculate the coefficients a _xi , the summand a _{10 ,} the delays Τ _Xi and the delay T after the training session using the exertion data BD(t ) and the physiological data PD(t) determined in the majority of the training units and optionally the height h(t) determined in the majority of the training units, which in the majority of the

Training units determined temperature Tempit) and / or the determined in the majority of training units inclination N (t) to adapt to a basic fitness of the person 8 into account. For this purpose, the computing unit 3 can be set up to adjust the coefficients a _xi , the summand a ₁₀ , the delays τ _xi and the delay T after the training unit using the optimization algorithm 11, which has the steps: a) Predetermining a plurality of discrete values for each the coefficient a _xi , for the summand a ₁₀ , for each of the delays τ _xi and for the delay T; b) setting a _xi , a ₁₀ , τ _xi and T to one of the values; c) calculating mPD (t+T) from the model; d) calculating a modeling error between the measured physiological data PD(t+T) and mPD(t+T) for a plurality of t; e) repeating steps b) through d) for all combinations of values; f) Choosing those values for a _xi , a ₁₀ , T _i and T that result in the lowest modeling error. In step d), underestimation errors can be weighted 11 more heavily than overestimation errors.

As can be seen from Figure 2, the computing unit 3 can be set up to calculate the coefficients a _xi and the summand a ₁₀ during a training session using an algorithm for adapting a daily fitness level 12 using the exertion data BD(t) determined in the training session and the in physiological data determined during the training session PD{t) and optionally the height h(t) determined in the training unit, the temperature Temp(t) determined in the training unit and/or the incline N(t) determined in the training unit, in order to take the daily fitness of the person 8 into account . For this purpose, the computing unit can be set up, for example, to calculate a difference Diff(t)=mPD(t)-PD(t) between the forecast of the physiological data mPD(t) and the measured physiological data PD(t ) to determine, and if the difference Diff(t) exceeds a threshold value of ₁ >0, to correct the coefficients a _xi by adding a respective constant constixi and to correct the summand a ₁₀ by adding a constant constio and if the difference Diff (t) from a threshold threshold 0 to correct the coefficients a _xi by adding a respective constant const _Mxi and to correct the summand aio by adding a constant const _MO .

The coefficients a _xi determined in the optimization algorithm 11 and delays Τ _Xi and T and the coefficients a _xi determined in the algorithm for adapting the daily form 12 and the summand aio determined in the optimization algorithm 11 and in the algorithm for determining the daily fitness are used to to create the prognosis mPD (t+T) in a step 10 . The prognosis mPD (t+T) is the controlled variable in the control unit 4 and the manipulated variable is the support u(t).

The exertion data BD(t) can be, for example, a performance, in particular a pedaling performance on a bicycle, in particular an electric bicycle, or on a bicycle ergometer, a mileage, a rowing performance, a speed, a torque, a speed, an angular velocity and/or knee abduction moment. If the training device 2 is the bicycle or the bicycle ergometer, the power 9 that is applied by the person 8 during training and is absorbed by the training device 2 becomes, a pedal performance. The training device 2 can also be a rowing ergometer or a rowing boat, for example, and the effort data could be the rowing performance. The exercise machine could also be an abductor/adductor machine and the effort data could be knee abduction moment.

The support unit 6 can have, for example, an electric motor, a gearbox and/or a brake. The support u(t) applied by the support unit 6 can be positive, which supports the training, and/or negative, which makes the training more difficult. An example of the support unit 6 that is set up to support the training is the electric motor. In this case, the assistance u(t) could be power applied by the electric motor, for example. Alternatively, it is conceivable that in the event that the effort data BD(t) is the power, the control unit 4 may be set up to increase the power P _M of the electric motor according to Pn{t)=u(t)*K*BD(t). determine. The factor K indicates the maximum possible motor support. K can be from 1 to 5, for example, and is in particular 3. An example of the support unit that is set up to make training more difficult is a brake, for example of a bicycle ergometer. In this case, the support could be braking power, for example. An example of a support unit that is set up to support the training and to make it more difficult is the electric motor, which is set up to carry out recuperation, ie to convert the person's pedaling power into electrical current. The support unit 6 can be set up to control the support u(t) in small increments. For example, increments of at most 3%, in particular at most 1.5% or at most 1%, are conceivable. It applies here that 100% corresponds to a maximum support u(t) if the support unit is set up to support the training. In the event that the support unit is set up, the training to make it more difficult, -100% corresponds to a maximum difficulty of the training.

The physiological data PD(t) can include heart rate, heart rate variability, an electrocardiogram, blood oxygen saturation, blood pressure, neurological activity, in particular electroencephalography, adduction, in particular knee adduction, and/or knee flexion. The adduction and/or knee flexion can be determined, for example, by means of a plurality of inertial measurement units attached to the person 8, which are set up to determine acceleration values and/or rotation data.

The physiological data PD(t), the exertion data BD(t) and the support u(t) of a training unit carried out with an electric bicycle as the training device 2 are plotted in FIG. The physiological data PD(t) is the heart rate in beats per minute (bpm). The heart rate can be measured, for example, with the body sensor 7, which is housed in a chest strap. The effort data BD(t) is the pedal power in watts. Pedaling power can be determined, for example, by measuring torque and angular velocity. In order to achieve a particularly high quality of the torque, the torque according to FIG. 6 was measured using a torque sensor from Innotorq, as is described, for example, in WO 2015/028345 A1. The angular velocity was measured by measuring the rotation of a pole ring using a magnetic field sensor. The support unit 6 according to FIG. 6 is the electric motor of the electric bicycle, the support of which is regulated from 0% to 100%. If the electric motor can perform recuperation, the support can be regulated from -100% to 100%. In the top plot in Figure 6, the dashed line represents the reference variable.

It can be seen that the benchmark changes over time can change. In addition, it can be seen that the measured heart rate approximates the reference variable well at all times.

Reference List

1 device

2 training device 3 computing unit

4 control unit

5 effort measuring device

6 support unit

7 body sensor 8 person

9 performance

10 Creation of the forecast mPD(t+T)

11 optimization algorithm

12 Daily Fitness Adjustment Algorithm 13 Tangent at Inflection Point

BP(t) effort data PD(t) physiological data mPD (t+T) prediction of physiological data u support t time

Tu Delay period Tv Compensation period

To time of abrupt change of support

Claims

patent claims

1. Device for controlling a training device (2) with

- The training device (2), which is set up to absorb mechanical power (9) applied by a person (8) performing physical training, and a support unit (6) which is set up to support the training and/or the training to make it more difficult, and an effort measuring device (5) arranged to measure mechanical effort data BD(t) of an effort exerted by the person during the exercise, where t is the time,

- a body sensor (7) which is set up to measure physiological data PD(t) of the body of the person (8),

- a computing unit (3) in which a mathematical model of the form mPD(t+T) is stored, the computing unit (3) being set up using an optimization algorithm (11) mPD(t+T) and the delay T for each individually adapting the person so that mPD(t+T) approximates the measured physiological data PD(t+T) and using the model to make a prediction mPD(t+T) of the physiological data PD(t+T), and

- A control unit (4), which is set up to provide a predetermined reference variable for the physiological data PD{t), to take the prognosis mPD(t+T) as a controlled variable and to provide a support u{t) of the support unit ( 6) to control.

2. Device according to claim 1, wherein: and and wherein the computing unit (3) is set up to use the optimization algorithm (11) to adjust the coefficients a _xi , the summand aw and the delays Τ _Xi individually, at least in part, for each person in such a way that mPD ( t + T) matches the measured physiological data PD ( t +T) approximates.

3. Device according to claim 2, wherein the training device (2) has an altimeter which is set up to measure the height h {t) of the training device (2) and is in the model.

4. The device according to claim 2 or 3, wherein the training device (2) has a temperature sensor which is set up to measure the temperature Temp (t) in the vicinity of the training device (2) and is in the model.

5. Device according to one of claims 2 to 4, wherein the training device (2) has an inclination sensor which is set up to measure an inclination N(t) of the training device (2) and is in the model.

6. Device according to one of claims 1 to 5, wherein the computing unit (3) is set up to create the prognosis mPD (t+T) for the point in time T, which is at least T=5 s in the future.

7. Device according to one of claims 2 to 6, wherein the computing unit (3) is set up using the optimization algorithm (11) the coefficients a _xi , the addend a ₁₀ , the delays Τ _Xi and the delay T after of the training session using the exertion data BD(t) determined in a plurality of the training sessions and the physiological data PD(t) determined in the majority of the training sessions and optionally the height h(t) determined in the majority of the training sessions, the altitude h(t) determined in the majority of the Training units determined temperature Temp (t) and / or determined in the majority of training units inclination N (t) to adapt to a basic fitness of the person (8) into account.

8. The device according to claim 7, wherein the computing unit (3) is set up, after the training unit, to adapt the coefficients a _xi , the summand a ₁₀ , the delays Τ _Xi and the delay T by means of the optimization algorithm (11), which has the steps: a) specifying a plurality of discrete values for each of the coefficients a _xi , for the summand a ₁₀ , for each of the delays Τ _Xi and for the delay T; b) setting a _xi , a ₁₀ , τ _xi and T to one of the values; c) calculating mPD (t+T) from the model; d) calculating a modeling error between the measured physiological data PD(t+T) and mPD(t+T) for a plurality of t. e) repeating steps b) through d) for all combinations of values; f) Choosing those values for a _xi , a ₁₀ , τ _xi and T that result in the lowest modeling error.

9. Device according to claim 8, wherein in step d) underestimation errors are weighted more heavily than overestimation errors (11).

10. Device according to one of claims 2 to 9, wherein the computing unit (3) is set up to use an algorithm for adapting a daily fitness (12) to calculate the coefficients a _xi and the summand a ₁₀ during a training session using the exertion data determined in the training session BP(t) and the one in the training session determined physiological data PD{t) and optionally the height h(t) determined in the training unit, the temperature Temp(t) determined in the training unit and/or the incline N(t) determined in the training unit, in order to adjust the person's fitness for the day (8) to be considered.

11. The device according to claim 10, wherein the computing unit is set up to calculate a difference Diff[t)=mPD(t)-PD(t) between the prognosis of the physiological data mPD(t) and to determine the measured physiological data PD(t), and if the difference Diff(t) exceeds a threshold value >0, to correct the coefficients a _xi by adding a respective constant const ₁ and to add a constant const 1 to the summand a ₁₀ correct and, if the difference Diff(t) falls below a threshold value thresholdM<0, to correct the coefficients a _xi by adding a respective constant const _Mxi and to correct the summand a ₁₀ by adding a constant const _MO .

12. Device according to one of claims 1 to 11, wherein the control unit (4) is a PID controller.

13. The device according to claim 12, wherein the PID controller is set up, the support u (t) according to to be determined, where K _p , K _I and K _D are control parameters, where e(t) is the control deviation at time t, the functions f ₁ (e), f ₂ (e) and f ₃ (e) being chosen in this way that underestimation errors are weighted more heavily than overestimation errors.

14. The device according to claim 13, wherein the computing unit (3) is set up to carry out a calibration method in which an abrupt change in the manipulated variable results in a step response of the physiological data PD(t) or the exertion data BD{T) is generated, the computing unit (3) being set up to determine the control parameters K _p , K _I and K _D ZU from the step response.

15. The device according to claim 13 or 14, wherein the computing unit (3) is set up to identify at least one abrupt change in the manipulated variable and the resulting step response of the physiological data PD(t) or the exertion data BD{T) after a training session, wherein the computing unit is set up to determine the control parameters K _p , K _I and K _D ZU from the at least one step response.

16. The device according to any one of claims 1 to 15, wherein the effort data BD (t) a performance, in particular a pedaling power in a bicycle, in particular an electric bicycle, or in a bicycle ergometer, a

Mileage, a rowing power, a speed, a torque, a rotational speed, an angular velocity and/or knee abduction moment.

17. Device according to one of claims 1 to 16, wherein the support unit (6) has an electric motor, a manual transmission and/or a brake.

18. Device according to one of claims 1 to 17, wherein the physiological data PD(t) is a heart rate, a heart rate variability, an electrocardiogram, an oxygen saturation of the blood, a blood pressure, a neurological activity, in particular an electroencephalography, an adduction, in particular a knee adduction , and/or knee flexion.